The Samsung INR21700-53G 5300mAh 15.9A Continuous Discharge Li-ion Rechargeable Battery (the enhanced next-generation successor to the popular 50G cell) represents the pinnacle of energy density in the 21700 form factor. Manufactured by Samsung SDI and supplied by DXF POWER with strict quality grading, this flat-top unprotected cell delivers an industry-leading 5300mAh typical capacity (5140mAh minimum) on a 3.63V nominal platform with a robust 3C (15.9A / 15,900mA) maximum continuous discharge rating. Engineered for sustained runtime, exceptional 1,000-cycle life longevity, and reliable thermal stability, the 53G is the ultimate choice for electric bicycles (e-bikes), electric scooters, high-performance LED torches, robotics, solar storage, and custom DIY battery packs.

Watch DXF Batteries in Action

Key Features

• Genuine Samsung SDI 53G Cell: Authentic Grade-A 21700 cylindrical cell engineered in Korea/Malaysia, offering state-of-the-art 5300mAh energy density
• 15.9A (3C) Continuous Discharge: Robust 15,900mA maximum continuous current capability powers demanding electric mobility and portable devices
• Industry-Leading 5300mAh Capacity: 5300mAh typical (5140mAh minimum) delivers class-leading runtime for long-distance rides and extended illumination
• Outstanding 1,000+ Cycle Durability: Maintains ≥80% of initial capacity even after 1,000 charge/discharge cycles under recommended cycling conditions
• Fast CC-CV Charging Support: Supports 0.33C (1,749mA) standard charging with up to 5,300mA maximum charging current
• Standard 21700 Flat-Top Design: Dimensions of Φ Max 21.30 mm diameter × Max 70.70 mm height with flat top terminal, optimized for spot welding and custom pack builds
• Multiple Pack Bundles: Available in 1, 10, 20, 50, and 100 piece packages to suit single replacements or bulk battery pack fabrication
• Strict Factory Quality Testing: Cells are inspected for voltage balance, internal resistance, and capacity consistency across every batch

Specifications, Per Battery

• Brand / Manufacturer: Samsung SDI (Supplied by DXF POWER)
• Model / Part No.: INR21700-53G (53G, Ver. 2)
• Cell Type: 21700 Cylindrical Rechargeable Lithium-ion (Li-ion)
• Positive Pole: Flat (Flat Top)
• Protection Circuit: No (Unprotected industrial bare cell)
• Typical Discharge Capacity: 5300mAh (1C = 5,300mA rating)
• Minimum Discharge Capacity: 5140mAh (0.2C / 1060mA discharge to 2.5V @ RT)
• Nominal Voltage: 3.63V
• Charging Method: CC-CV (constant voltage with limited current)
• Standard Charging Current: 0.33C (1,749mA)
• Max. Charging Voltage: 4.2V (4.15V recommended for extended cycle life)
• Max. Charging Current: 5,300mA (5.3A)
• Discharge Cut-off Voltage: 2.5V (3.0V recommended for extended cycle life)
• Max. Continuous Discharge Current: 3C (15,900mA / 15.9A)
• Cycle Life: Capacity ≥ 80% after 1,000 cycles (80% of initial capacity @ RT)
• Operating Temperature: Charge: 0°C to 45°C; Discharge: -20°C to 60°C
• Storage Temperature: 1 year: -20°C to 23°C; 3 months: -20°C to 45°C; 1 month: -20°C to 60°C
• Maximum Cell Dimensions: Diameter: Φ Max. 21.30 mm × Height: Max. 70.70 mm
• Cell Weight: Max. 71.5 g
• Manufacturing Sites: Korea & Malaysia
• Applications: Electric bicycles (e-bikes), electric scooters, high-lumen flashlights, robotics, portable energy storage, and custom DIY battery packs

Package Includes

• Samsung INR21700-53G 5300mAh 15.9A battery cells, quantity chosen from 1, 10, 20, 50, or 100 PCS
• Protective packaging / cell box
• User manual and battery safety guide

Choose Your Ideal Power Bundle

• 1 PCS – Quick Replacement & Testing: Single cell for flashlight upgrade, tool testing, or individual cell repair
• 10 PCS – Small Pack Rebuilds: Perfect for rebuilding portable power banks and handheld devices
• 20 PCS – Auxiliary & Mobility Modules: Ideal for 24V/36V auxiliary modules, robotics, and compact DIY power packs
• 50 PCS – E-Bike & Scooter Battery Packs: Tailored for ultra-high capacity 36V/48V electric bike packs, e-scooters, and portable energy stations
• 100 PCS – Volume Pack Assembly: Best value for workshops, custom pack assemblers, and volume battery builders

Purchasing in bundles ensures matched cell batches for balanced series and parallel assembly.

180-Day Warranty & Customer Support

Every cell batch supplied by DXF POWER is covered by a 180-day manufacturer warranty against defects in materials and craftsmanship. Our technical support team is always available to assist with charging parameters, pack layout recommendations, and safety practices.

Usage & Safety Guidelines

• Use a dedicated lithium-ion smart charger supporting CC/CV charging mode.
• Standard charging voltage is 4.20V (charge to 4.15V to maximize cycle life).
• Discharge cut-off voltage is 2.5V (3.0V recommended for prolonged cycle life).
• Charge within 0°C to 45°C; discharge within -20°C to 60°C.
• Always inspect cell outer shrink wrap, insulator ring, and terminals for damage before use; rewrap immediately if damaged.
• Never carry loose 21700 batteries in pockets, bags, or purses with metal objects like keys or coins; always store in an insulated battery case.
• Do not short-circuit, crush, incinerate, puncture, or submerge cells in water.
• Store batteries at 3.60V–3.85V per cell in a cool, dry, well-ventilated location away from direct sunlight.
• When building multi-cell packs, always integrate a quality Battery Management System (BMS) with over-current, over-charge, over-discharge, and thermal balance protection.

Why Choose DXF?

• Genuine Grade-A Samsung SDI 53G cells with industry-leading 5300mAh capacity and 15.9A continuous output
• Tested continuous discharge performance and outstanding 1,000+ cycle durability
• Carefully matched batches for balanced series and parallel pack assembly
• Strict factory pre-shipment quality checks and secure protective packaging
• Global warehouse logistics network and professional technical customer support

Perfect For

Engineered for e-mobility builders, DIY pack fabricators, contractors, and flashlight enthusiasts demanding maximum 5300mAh capacity, reliable 15.9A continuous output, and long 1,000-cycle durability for electric bikes, e-scooters, robotics, and custom energy storage modules.

Power your projects with trusted Samsung 21700 performance. Learn more about setups and battery care on the DXF YouTube channel.

The Samsung INR21700-48X 4800mAh 9.6A Continuous Discharge Li-ion Rechargeable Battery is an ultra-long cycle life 21700 cylindrical power cell engineered by Samsung SDI and supplied by DXF POWER with strict quality grading. Designed for applications requiring unprecedented longevity, this flat-top unprotected bare cell delivers a 4800mAh typical capacity (4650mAh minimum) on a 3.64V nominal platform with a dependable 9.6A (2C) continuous discharge rating. Featuring an extraordinary 3,000+ cycle life (retaining ≥70% capacity after 3,000 full cycles), the 48X is the ultimate long-term investment for electric bicycles (e-bikes), electric scooters, solar energy storage systems, robotics, LED flashlights, and custom DIY battery packs.

Watch DXF Batteries in Action

Key Features

• Genuine Samsung SDI 48X Cell: Authentic Grade-A 21700 cylindrical cell engineered by Samsung SDI for exceptional durability and long service life
• Unmatched 3,000+ Cycle Life: Retains ≥70% of initial capacity even after 3,000 charge/discharge cycles under recommended cycling conditions
• 4800mAh High Capacity: Typical 4800mAh (4650mAh minimum) capacity ensures prolonged runtime and consistent energy output
• 9.6A Continuous Discharge: Delivers reliable 9.6A (2C) continuous current output for electric mobility and multi-cell pack applications
• Standard 21700 Bare Cell Format: Dimensions of Φ 21.15 ± 0.20 mm diameter × 70.65 ± 0.15 mm height with flat top terminals, optimized for spot welding
• CC-CV Charging Support: Charges reliably to 4.20V (or 4.10V to achieve maximum 3,000+ cycle life) with 0.33C (1,584mA) standard charging current
• Multiple Pack Bundles: Available in 1, 10, 20, 50, and 100 piece packages for single cell replacements or large-scale pack fabrication
• Strict Factory Quality Testing: Cells are inspected for voltage balance, internal resistance, and capacity consistency across every batch

Specifications, Per Battery

• Brand / Manufacturer: Samsung SDI (Supplied by DXF POWER)
• Model / Part No.: INR21700-48X (48X, tube cell)
• Cell Type: 21700 Cylindrical Rechargeable Lithium-ion (Li-ion)
• Positive Pole: Flat (Flat Top)
• Protection Circuit: None (Unprotected industrial bare cell; requires compatible device-level or pack-level protection)
• Typical Discharge Capacity: 4800mAh (at 0.2C / 960mA discharge to 2.5V @ RT)
• Minimum Discharge Capacity: 4650mAh (1C = 4,800mA)
• Nominal Voltage: Typ. 3.64V
• Max. Charging Voltage: 4.2V (4.10V recommended for maximum 3,000-cycle life)
• Charging Method: CC-CV (constant voltage with limited current)
• Charging Current Rate: 0.33C (1,584mA)
• Discharge Cut-off Voltage: 2.5V (3.0V recommended for cycle life)
• Continuous Discharge Current: 9.6A (2C) continuous / 4.8A (1C) rated
• Cycle Life: Capacity ≥ 70% after 3,000 cycles (Charge: 1.0C / 4,800mA to 4.10V; Discharge: 1.0C / 4,800mA to 3.0V @ RT)
• Operating Temperature: Charge: 0°C to 50°C; Discharge: -30°C to 60°C
• Storage Temperature: 1 year: -20°C to 25°C; 3 months: -40°C to 45°C; 1 month: -40°C to 60°C
• Cell Dimensions: Diameter: Φ 21.15 ± 0.20 mm × Height: 70.65 ± 0.15 mm
• Cell Weight: 68.0 g ± 1.5 g
• Applications: Electric bicycles (e-bikes), electric scooters, high-lumen flashlights, robotics, solar energy storage systems, and custom DIY battery packs

Package Includes

• Samsung INR21700-48X 4800mAh 9.6A battery cells, quantity chosen from 1, 10, 20, 50, or 100 PCS
• Protective packaging / cell box
• User manual and battery safety guide

Choose Your Ideal Power Bundle

• 1 PCS – Quick Replacement & Testing: Single cell for flashlight upgrade, tool testing, or individual cell repair
• 10 PCS – Small Pack Rebuilds: Perfect for rebuilding portable power banks and handheld devices
• 20 PCS – Auxiliary & Mobility Modules: Ideal for 24V/36V auxiliary modules, robotics, and compact DIY power packs
• 50 PCS – Long-Life E-Bike & Scooter Battery Packs: Tailored for 3,000-cycle high-end 36V/48V electric bike packs and solar storage
• 100 PCS – Volume Pack Assembly: Best value for workshops, custom pack assemblers, and volume battery builders

Purchasing in bundles ensures matched cell batches for balanced series and parallel assembly.

180-Day Warranty & Customer Support

Every cell batch supplied by DXF POWER is covered by a 180-day manufacturer warranty against defects in materials and craftsmanship. Our technical support team is always available to assist with charging parameters, pack layout recommendations, and safety practices.

Usage & Safety Guidelines

• Use a dedicated lithium-ion smart charger supporting CC/CV charging mode up to 4.20V (or 4.10V for extended 3,000-cycle longevity).
• Never charge above 4.20V per cell or discharge below 2.5V per cell.
• Charge within 0°C to 50°C; discharge within -30°C to 60°C.
• Always inspect cell outer shrink wrap, insulator ring, and terminals for damage before use; rewrap immediately if damaged.
• Never carry loose 21700 batteries in pockets, bags, or purses with metal objects like keys or coins; special insulated battery cases are recommended.
• Do not short-circuit, crush, incinerate, puncture, or submerge cells in water.
• Store batteries at 3.60V–3.85V per cell in a cool, dry, well-ventilated location away from direct sunlight.
• When building multi-cell packs, always integrate a quality Battery Management System (BMS) with over-current, over-charge, over-discharge, and thermal balance protection.

Why Choose DXF?

• Genuine Grade-A Samsung SDI 48X cells with industry-benchmark 3,000-cycle longevity and 4800mAh capacity
• Tested continuous discharge performance and superior thermal endurance
• Carefully matched batches for balanced series and parallel pack assembly
• Strict factory pre-shipment quality checks and secure protective packaging
• Global warehouse logistics network and professional technical customer support

Perfect For

Engineered for e-mobility builders, solar storage developers, DIY pack fabricators, and torch enthusiasts demanding reliable 4800mAh capacity, 9.6A continuous output, and extraordinary 3,000-cycle life for electric bikes, e-scooters, robotics, and custom energy storage modules.

Power your projects with trusted Samsung 21700 performance. Learn more about setups and battery care on the DXF YouTube channel.

The Samsung INR21700-50E 5000mAh 9.8A Continuous Discharge Li-ion Rechargeable Battery is an industry-benchmark high-capacity 21700 cylindrical power cell. Manufactured by Samsung SDI and supplied by DXF POWER with strict quality grading, this flat-top unprotected cell delivers a massive 5000mAh typical capacity (4753mAh minimum) on a 3.6V–3.7V nominal platform with a dependable 9.8A constant continuous discharge rating. As 21700 format batteries rapidly replace older 18650 cells across modern applications, the 50E provides maximum energy density and runtime for electric bicycles, e-scooters, long-range LED torches, robotics, and custom DIY battery packs.

Watch DXF Batteries in Action

Key Features

• Genuine Samsung SDI 50E Cell: Authentic Grade-A 21700 cylindrical cell renowned worldwide for outstanding 5000mAh energy density and reliable cycle life
• 9.8A Constant Continuous Discharge: Engineered to sustain a reliable 9.8A continuous current output for energy-focused electronics and multi-cell battery packs
• 5000mAh Ultra-High Capacity: 5000mAh typical (4753mAh minimum) offers exceptional operating runtime per charge
• CC-CV Charging Support: Supports 2.45A standard charging current with up to 4.9A maximum charging current
• Standard 21700 Flat-Top Design: Dimensions of 21.25 ± 0.1 mm diameter × 70.8 ± 0.15 mm height with flat terminals, ideal for spot-welded custom packs
• Multiple Pack Bundles: Available in 1, 10, 20, 50, and 100 piece packages for single cell replacements or large-scale pack fabrication
• Strict Factory Quality Testing: Cells are inspected for voltage balance, internal resistance, and capacity consistency across every batch

Specifications, Per Battery

• Brand / Manufacturer: Samsung SDI (Supplied by DXF POWER)
• Model / Part No.: INR21700-50E (50E)
• Cell Type: 21700 Cylindrical Rechargeable Lithium-ion (Li-ion)
• Positive Pole: Flat (Flat Top)
• Protection Circuit: No (Unprotected industrial bare cell)
• Type Capacity: 5000mAh
• Minimum Capacity: 4753mAh
• Nominal Voltage: 3.6V – 3.7V
• Charging End Voltage: 4.2V
• Discharge Cut-off Voltage: 2.5V
• Max. Constant Current Output: 9.8A
• Charging Method: CC-CV
• Charging Current: 2.45A
• Max. Charging Current: 4.9A
• Diameter: 21.25 mm ± 0.1 mm
• Height: 70.8 mm ± 0.15 mm
• Weight: 69 g ± 1 g
• Applications: Electric bicycles (e-bikes), electric scooters, high-lumen flashlights, robotics, portable energy storage, and custom DIY battery packs

Package Includes

• Samsung INR21700-50E 5000mAh 9.8A battery cells, quantity chosen from 1, 10, 20, 50, or 100 PCS
• Protective packaging / cell box
• User manual and battery safety guide

Choose Your Ideal Power Bundle

• 1 PCS – Quick Replacement & Testing: Single cell for flashlight upgrade, tool testing, or individual cell repair
• 10 PCS – Small Pack Rebuilds: Perfect for rebuilding portable power banks and handheld devices
• 20 PCS – Auxiliary & Mobility Modules: Ideal for 24V/36V auxiliary modules, robotics, and compact DIY power packs
• 50 PCS – E-Bike & Scooter Battery Packs: Tailored for high-capacity 36V/48V electric bike packs, e-scooters, and portable energy stations
• 100 PCS – Volume Pack Assembly: Best value for workshops, custom pack assemblers, and volume battery builders

Purchasing in bundles ensures matched cell batches for balanced series and parallel assembly.

180-Day Warranty & Customer Support

Every cell batch supplied by DXF POWER is covered by a 180-day manufacturer warranty against defects in materials and craftsmanship. Our technical support team is always available to assist with charging parameters, pack layout recommendations, and safety practices.

Usage & Safety Guidelines

• Use a dedicated lithium-ion smart charger supporting CC/CV charging mode.
• Never charge above 4.2V per cell or discharge below 2.5V per cell.
• Never exceed the maximum continuous discharge current of 9.8A.
• Always inspect cell outer shrink wrap, insulator ring, and terminals for damage before use; rewrap immediately if damaged.
• Never carry loose 21700 batteries in pockets, bags, or purses with metal objects like keys or coins; always store in an insulated battery case.
• Do not short-circuit, crush, incinerate, puncture, or submerge cells in water.
• Store batteries at 3.60V–3.85V per cell in a cool, dry, well-ventilated location away from direct sunlight.
• When building multi-cell packs, always integrate a quality Battery Management System (BMS) with over-current, over-charge, over-discharge, and thermal balance protection.

Why Choose DXF?

• Genuine Grade-A Samsung SDI 50E cells with authentic 5000mAh capacity and 9.8A continuous output
• Tested continuous discharge performance and high energy density
• Carefully matched batches for balanced series and parallel pack assembly
• Strict factory pre-shipment quality checks and secure protective packaging
• Global warehouse logistics network and professional technical customer support

Perfect For

Engineered for e-mobility builders, DIY pack fabricators, contractors, and flashlight enthusiasts demanding maximum 5000mAh capacity and reliable 9.8A continuous output for electric bikes, e-scooters, robotics, and custom energy storage modules.

Power your projects with trusted Samsung 21700 performance. Learn more about setups and battery care on the DXF YouTube channel.

The Samsung INR21700-50GB 5000mAh 15A Li-ion Rechargeable Battery is an ultra-high energy density 21700 cylindrical power cell manufactured by Samsung SDI (Korea) and supplied by DXF POWER with strict quality grading. Featuring an impressive 5000mAh typical capacity (4900mAh minimum) on a 3.66V nominal platform, this unprotected flat-top cell provides up to 15A continuous discharge, outstanding cycle stability (maintaining ≥80% capacity after 1,000 cycles), and broad operating temperatures (-30°C to 60°C discharge). It is the ideal high-capacity power solution for electric bicycles (e-bikes), electric scooters, long-runtime LED torches, robotics, solar energy storage, and custom DIY battery packs.

Watch DXF Batteries in Action

Key Features

• Genuine Samsung SDI 50GB Cell: Premium Grade-A 21700 cell engineered in Korea for maximum energy density and exceptional cycle life
• 5000mAh Ultra-High Capacity: 5000mAh typical (4900mAh minimum) ensures extended runtime in portable electric vehicles and high-drain electronics
• 15A Continuous Discharge: Reliable current delivery capable of supporting continuous draw up to 15A without compromising cell longevity
• Exceptional 1,000+ Cycle Life: Retains ≥80% of initial capacity even after 1,000 charge/discharge cycles under recommended cycling conditions
• Wide Temperature Operating Range: Discharges reliably from -30°C to 60°C and charges from 0°C to 50°C
• Standard 21700 Form Factor: Max dimensions (D) 21.3 × (L) 70.65 mm (±0.15 mm), flat top bare cell design ideal for spot welding and pack fabrication
• Multiple Pack Bundles: Available in 1, 10, 20, 50, and 100 piece packages to suit single replacements or volume pack assembly
• Strict Factory Quality Testing: Cells are inspected for voltage balance, internal resistance, and capacity consistency across every batch

Specifications, Per Battery

• Brand / Manufacturer: Samsung SDI (Supplied by DXF POWER)
• Part No. / Model: Samsung INR21700-50GB (50GB Bare Cell)
• Cell Origin: Made in Korea
• Cell Type: 21700 Cylindrical Rechargeable Lithium-ion (Li-ion)
• Positive Pole: Flat (Flat Top)
• Protection Circuit: No (Unprotected industrial bare cell)
• Typical Capacity: 5000mAh
• Minimum Capacity: 4900mAh (1C = 4900mA)
• Nominal Voltage: 3.66V
• Charging Voltage: 4.20 ± 0.03V (4.125V for cycle life)
• Charging Method: CC-CV
• Charging Current Rate: 0.33C (1617mA)
• Standard Charge Time: 240 minutes
• Cut-off Voltage: 4.2V (4.125V for cycle life) max charge voltage; 2.5V (3.0V for cycle life) discharge cut-off voltage
• Max. Continuous Discharge Current: 15A
• Cycle Life: Capacity ≥ 80% after 1,000 cycles (80% of initial capacity @ RT)
• Operating Temperature: Charge: 0°C to 50°C; Discharge: -30°C to 60°C
• Maximum Dimensions: Diameter: 21.3 mm × Length: 70.65 mm (±0.15 mm)
• Weight (Max.): 72.0 g
• Applications: Electric bicycles (e-bikes), e-scooters, electric mobility, high-output flashlights, power tools, robotics, and custom DIY battery packs

Package Includes

• Samsung INR21700-50GB 5000mAh 15A battery cells, quantity chosen from 1, 10, 20, 50, or 100 PCS
• Protective packaging / cell box
• User manual and battery safety guide

Choose Your Ideal Power Bundle

• 1 PCS – Quick Replacement & Testing: Single cell for flashlight upgrade, tool testing, or individual cell repair
• 10 PCS – Small Pack Rebuilds: Perfect for rebuilding portable power banks and handheld devices
• 20 PCS – Auxiliary & Mobility Modules: Ideal for 24V/36V auxiliary modules, robotics, and compact DIY power packs
• 50 PCS – E-Bike & Scooter Battery Packs: Tailored for high-capacity 36V/48V electric bike packs, e-scooters, and portable energy stations
• 100 PCS – Volume Pack Assembly: Best value for workshops, custom pack assemblers, and volume battery builders

Purchasing in bundles ensures matched cell batches for balanced series and parallel assembly.

180-Day Warranty & Customer Support

Every cell batch supplied by DXF POWER is covered by a 180-day manufacturer warranty against defects in materials and craftsmanship. Our technical support team is always available to assist with charging parameters, pack layout recommendations, and safety practices.

Usage & Safety Guidelines

• Use a dedicated lithium-ion smart charger supporting CC/CV charging mode.
• Standard charging voltage is 4.20V ± 0.03V (charge to 4.125V to maximize cycle life).
• Discharge cut-off voltage is 2.5V (3.0V recommended for prolonged cycle life).
• Charge within 0°C to 50°C; discharge within -30°C to 60°C.
• Always inspect cell outer shrink wrap, insulator ring, and terminals for damage before use; rewrap immediately if damaged.
• Never carry loose 21700 batteries in pockets, bags, or purses with metal objects like keys or coins; always store in an insulated battery case.
• Do not short-circuit, crush, incinerate, puncture, or submerge cells in water.
• Store batteries at 3.60V–3.85V per cell in a cool, dry, well-ventilated location away from direct sunlight.
• When building multi-cell packs, always integrate a quality Battery Management System (BMS) with over-current, over-charge, over-discharge, and thermal balance protection.

Why Choose DXF?

• Genuine Grade-A Samsung SDI 50GB cells with true 5000mAh high capacity and 15A continuous output
• Tested continuous discharge performance and outstanding 1,000+ cycle life
• Carefully matched batches for balanced series and parallel pack assembly
• Strict factory pre-shipment quality checks and secure protective packaging
• Global warehouse logistics network and professional technical customer support

Perfect For

Engineered for e-mobility builders, DIY pack fabricators, contractors, and flashlight enthusiasts demanding high 5000mAh capacity, reliable 15A continuous output, and long 1,000-cycle durability for electric bikes, e-scooters, robotics, and custom energy storage modules.

Power your projects with trusted Samsung 21700 performance. Learn more about setups and battery care on the DXF YouTube channel.

The Samsung INR21700-50S 5000mAh 25A Continuous Discharge Li-ion Rechargeable Battery is an industry-leading high-capacity, high-drain 21700 cylindrical power cell. Manufactured by Samsung SDI and supplied by DXF POWER with strict quality grading, this flat-top unprotected cell delivers a massive 5000mAh typical capacity (4800mAh minimum) on a 3.6V–3.7V nominal platform with a proven 25A constant continuous discharge rating (up to 45A continuous when monitored with an 80°C thermal cut-off). Combining extraordinary runtime with serious high-current discharge capability, it is the premier choice for high-power cordless tools, electric bicycles, e-scooters, high-lumen flashlights, robotics, and custom DIY battery packs.

Watch DXF Batteries in Action

Key Features

• Genuine Samsung SDI 50S Cell: Authentic Grade-A 21700 cylindrical cell widely recognized for delivering an unmatched combination of 5000mAh capacity and high-drain power
• 25A Constant Discharge Rating: Delivers true 25A constant continuous current without temperature monitoring (and up to 45A continuous with 80°C thermal monitoring)
• 5000mAh Ultra-High Capacity: 5000mAh typical (4800mAh minimum) for maximum runtime and energy density in high-performance portable applications
• Fast CC-CV Charging: Supports up to 2.5A standard charging and up to 6A (6000mA) maximum fast charging current
• Standard 21700 Flat-Top Design: Standard dimensions (21.15 ± 0.1mm diameter × 70.52 ± 0.15mm height) with flat top terminal, ideal for spot-welded packs and modular battery sleds
• Multiple Pack Bundles: Available in 1, 10, 20, 50, and 100 piece packages to suit single replacements or bulk pack fabrication
• Strict Factory Quality Testing: Cells are inspected for voltage balance, low internal resistance, and capacity consistency across every batch

Specifications, Per Battery

• Brand / Manufacturer: Samsung SDI (Supplied by DXF POWER)
• Model: INR21700-50S (50S)
• Cell Type: 21700 Cylindrical Rechargeable Lithium-ion (Li-ion)
• Positive Pole: Flat (Flat Top)
• Type Capacity: 5000mAh
• Minimum Capacity: 4800mAh
• Nominal Voltage: 3.6V – 3.7V
• Final Charging Voltage: 4.2V
• Final Discharge Voltage: 2.5V
• Max. Current Output Constant (Continuous): 25A (up to 45A temperature-monitored up to 80°C)
• Charging Current: 0.xx – 2.5A (2500mA)
• Max. Charging Current: 6A (6000mA)
• Charging Method: CC-CV
• Protection Circuit: No (Unprotected industrial cell)
• Diameter: 21.15 mm ± 0.1 mm
• Height: 70.52 mm ± 0.15 mm
• Weight: 72 g ± 1 g
• Applications: Cordless power tools, electric bicycles, e-scooters, electric skateboards, high-output flashlights, robotics, and custom DIY battery packs

Package Includes

• Samsung INR21700-50S 5000mAh 25A battery cells, quantity chosen from 1, 10, 20, 50, or 100 PCS
• Protective packaging / cell box
• User manual and battery safety guide

Choose Your Ideal Power Bundle

• 1 PCS – Quick Replacement & Testing: Single cell for flashlight upgrade, tool testing, or individual cell repair
• 10 PCS – Tool Pack Rebuilds: Perfect for rebuilding heavy-duty cordless power tool battery packs
• 20 PCS – High-Output Modules: Ideal for 36V or 48V auxiliary modules, robotics, and DIY power packs
• 50 PCS – Mobility & Energy Modules: Tailored for high-performance electric bike packs, e-scooters, and portable power stations
• 100 PCS – Master Builder Bulk Set: Best value for workshops, custom pack assemblers, and volume battery builders

Purchasing in bundles ensures matched cell batches for balanced series and parallel assembly.

180-Day Warranty & Customer Support

Every cell batch supplied by DXF POWER is covered by a 180-day manufacturer warranty against defects in materials and craftsmanship. Our technical support team is always available to assist with charging parameters, pack layout recommendations, and safety practices.

Usage & Safety Guidelines

• Use a dedicated lithium-ion smart charger supporting CC/CV charging mode.
• Never charge above 4.2V per cell or discharge below 2.5V per cell.
• Do not exceed cell surface temperature of 80°C during heavy continuous discharge.
• Always inspect cell outer shrink wrap, insulator ring, and terminals for damage before use; rewrap immediately if damaged.
• Never carry loose 21700 batteries in pockets, bags, or purses with metal objects like keys or coins; always store in an insulated battery case.
• Do not short-circuit, crush, incinerate, puncture, or submerge cells in water.
• Store batteries at 3.60V–3.85V per cell in a cool, dry, well-ventilated location away from direct sunlight.
• When building multi-cell packs, always integrate a quality Battery Management System (BMS) with over-current, over-charge, over-discharge, and thermal balance protection.

Why Choose DXF?

• Genuine Grade-A Samsung SDI 50S cells with true 5000mAh capacity and 25A high-drain output
• Tested continuous discharge performance under demanding operational loads
• Carefully matched batches for balanced series and parallel pack assembly
• Strict factory pre-shipment quality checks and secure protective packaging
• Global warehouse logistics network and professional technical customer support

Perfect For

Engineered for contractors, e-mobility builders, DIY pack fabricators, and torch enthusiasts demanding industry-leading 5000mAh capacity and 25A continuous output for high-drain cordless tools, electric transport, robotics, and custom energy modules.

Power your projects with trusted Samsung 21700 performance. Learn more about setups and battery care on the DXF YouTube channel.

The Samsung INR21700-40T 4000mAh 35A Continuous Discharge Li-ion Rechargeable Battery (40T / 40T5) is an elite high-drain 21700 cylindrical power cell engineered for demanding high-current applications. Manufactured by Samsung SDI and supplied by DXF POWER with strict quality grading, this flat-top unprotected cell delivers a minimum 4000mAh standard capacity at 3.6V nominal platform (4.20V max charge) with an impressive 35A continuous discharge rating without temperature cut (up to 45A with an 80°C thermal cut-off). It is the premier choice for high-draw cordless power tools, electric skateboards, e-bikes, scooters, high-lumen flashlights, and custom multi-cell DIY battery packs requiring massive current delivery and robust cycle life.

Watch DXF Batteries in Action

Key Features

• Genuine Samsung SDI 40T Cell: Authentic Grade-A 21700 cylindrical cell (40T / 40T5) renowned for low internal resistance and massive continuous power delivery
• 35A Continuous Discharge Rating: Delivers true 35A continuous discharge without temperature cutoff (and up to 45A with 80°C surface thermal control)
• 4000mAh High Capacity: Minimum 4000mAh standard discharge capacity (at 0.2C / 800mA) and minimum 3900mAh rated capacity at 10A discharge
• High-Speed Rated Charging: Supports 2A standard charge (approx. 180 mins) and rapid 6A rated charging (approx. 70 mins to full charge)
• Robust Cycle Life & Storage Recovery: Retains ≥2400mAh after 250 harsh cycles (6A charge / 35A discharge at 25°C), and ≥3510mAh recovery after 30 days storage at 60°C
• Standard 21700 Flat-Top Design: Dimensions (21.22mm max diameter × 70.30mm max height) with flat top terminal, ideal for spot-welded packs and modular battery sleds
• Multiple Pack Bundles: Available in 1, 10, 20, 50, and 100 piece packages to suit single replacements or bulk pack fabrication

Specifications, Per Battery

• Brand / Manufacturer: Samsung SDI (Supplied by DXF POWER)
• Model / Variant: INR21700-40T (40T / 40T5)
• Cell Type: 21700 Cylindrical Rechargeable Lithium-ion (Li-ion)
• Positive Terminal / Form Factor: Flat Top (Unprotected industrial cell)
• Standard Discharge Capacity: Minimum 4000mAh (at 0.2C / 800mA discharge to 2.5V)
• Rated Discharge Capacity: Minimum 3900mAh (at 10A discharge to 2.5V)
• Nominal Voltage: 3.6V
• Charge Cut-Off Voltage: 4.20V
• Discharge Cut-Off Voltage: 2.50V (end-of-discharge)
• Continuous Discharge Current: 35A (without temperature cut, recommended headline rating); 45A with 80°C surface thermal control
• Standard Charge: CC-CV, 2A, 4.20V, 200mA cut-off (approx. 180 minutes)
• Rated Fast Charge: CC-CV, 6A, 4.20V, 100mA cut-off (approx. 70 minutes)
• Cycle-Life Criterion: ≥2400mAh after 250 cycles (6A charge, 35A discharge to 2.5V at 25°C)
• Storage Recovery: ≥3510mAh after 30 days at 60°C
• Ambient Operating Temperature: Charge: 0°C to 45°C / Discharge: -20°C to 60°C
• Surface Temperature Limits: Charge: 0°C to 50°C / Discharge: -20°C to 80°C (recommended re-discharge release <60°C)
• Dimensions: 21.22mm max diameter × 70.30mm max height (with tube)
• Weight: 70.0g max (approx. 67g nominal)
• Protection: No integrated protection circuit (requires device-level or pack BMS protection)
• Applications: Cordless power tools, electric bicycles, e-scooters, electric skateboards, high-output flashlights, robotics, and custom DIY battery packs

Package Includes

• Samsung INR21700-40T 4000mAh 35A battery cells, quantity chosen from 1, 10, 20, 50, or 100 PCS
• Protective packaging / cell box
• User manual and battery safety guide

Choose Your Ideal Power Bundle

• 1 PCS – Quick Replacement & Testing: Single cell for flashlight upgrade, tool testing, or individual cell repair
• 10 PCS – Tool Pack Rebuilds: Perfect for rebuilding heavy-duty cordless power tool battery packs
• 20 PCS – High-Output Modules: Ideal for 36V or 48V auxiliary modules, robotics, and DIY power packs
• 50 PCS – Mobility & Energy Modules: Tailored for high-performance electric bike packs, e-scooters, and portable power stations
• 100 PCS – Master Builder Bulk Set: Best value for workshops, custom pack assemblers, and volume battery builders

Purchasing in bundles ensures matched cell batches for balanced series and parallel assembly.

180-Day Warranty & Customer Support

Every cell batch supplied by DXF POWER is covered by a 180-day manufacturer warranty against defects in materials and craftsmanship. Our technical support team is always available to assist with charging parameters, pack layout recommendations, and safety practices.

Usage & Safety Guidelines

• Use a dedicated lithium-ion smart charger supporting CC/CV charging mode.
• Never charge above 4.20V per cell or discharge below 2.50V per cell.
• Do not exceed cell surface temperature of 50°C during charging and 80°C during discharge; allow cell to cool below 60°C before recharging.
• Always inspect cell outer shrink wrap, insulator ring, and terminals for damage before use; rewrap immediately if damaged.
• Never carry loose 21700 batteries in pockets, bags, or purses with metal objects like keys or coins; always store in an insulated battery case.
• Do not short-circuit, crush, incinerate, puncture, or submerge cells in water.
• Store batteries at 3.60V–3.85V per cell in a cool, dry, well-ventilated location away from direct sunlight.
• When building multi-cell packs, always integrate a quality Battery Management System (BMS) with over-current, over-charge, over-discharge, and thermal balance protection.

Why Choose DXF?

• Genuine Grade-A Samsung SDI 40T cells with true 4000mAh capacity and tested 35A high-drain output
• Reliable 35A continuous discharge rating under demanding industrial operational loads
• Carefully matched batches for balanced series and parallel pack assembly
• Strict factory pre-shipment quality checks and secure protective packaging
• Global warehouse logistics network and professional technical customer support

Perfect For

Engineered for contractors, e-mobility builders, DIY pack fabricators, and enthusiasts demanding class-leading 35A continuous output and 4000mAh capacity for high-drain cordless tools, electric transport, robotics, and custom energy modules.

Power your projects with trusted Samsung 21700 performance. Learn more about setups and battery care on the DXF YouTube channel.

The Samsung INR21700-45T 4500mAh 35A Continuous Discharge Li-ion Rechargeable Battery is an ultra-high performance 21700 cylindrical power cell manufactured by Samsung SDI and supplied by DXF POWER with strict quality grading. Designed for extreme current applications, this flat-top bare cell delivers a generous 4500mAh typical capacity (4400mAh minimum) on a 3.6V nominal platform with a massive 35A continuous discharge capability without thermal cut-off (and up to 50A continuous when monitored with an 80°C temperature cut). Combining sustained high-power output, rapid charging capability (up to 6A continuous / 9A step charge), and exceptional voltage retention under heavy loads, it is the premier choice for high-draw cordless power tools, RC models, electric skateboards, e-bikes, and custom DIY battery packs.

Watch DXF Batteries in Action

Key Features

• Genuine Samsung SDI 45T Cell: Authentic Grade-A 21700 cylindrical power cell engineered for demanding high-drain industrial and hobby applications
• 35A Constant Continuous Discharge: Delivers true 35A constant current without temperature cut-off (and up to 50A continuous with 80°C thermal monitoring)
• 4500mAh High Capacity: Typical 4500mAh (4400mAh minimum) capacity balances extreme discharge power with long runtime
• High-Speed Charging Capability: Supports up to 6A continuous rated charge (full charge in approx. 75 minutes) and 9A step charging
• Robust Thermal & Cycle Stability: Operates across a wide temperature range (-20°C to 60°C discharge) with proven cycle retention under high-amp discharge
• Standard 21700 Bare Cell: Flat-top form factor (Max 21.35mm diameter × 70.62mm height) optimized for spot-welded custom battery packs
• Multiple Pack Bundles: Available in 1, 10, 20, 50, and 100 piece packages to suit single cell replacements or large-scale pack fabrication
• Strict Factory Quality Testing: Cells are inspected for voltage balance, low internal resistance, and capacity consistency across every batch

Specifications, Per Battery

• Brand / Manufacturer: Samsung SDI (Supplied by DXF POWER)
• Model / Part No.: INR21700-45T (45T)
• Cell Type: 21700 Cylindrical Rechargeable Lithium-ion (Li-ion)
• Positive Pole: Flat (Flat Top)
• Protection Circuit: No (Unprotected industrial bare cell)
• Typical Discharge Capacity: 4500mAh (0.2C / 0.9A discharge to 2.5V @ RT)
• Minimum Discharge Capacity: 4400mAh (Rated min. 4300mAh at 10A discharge)
• Nominal Voltage: 3.6V
• Standard Charge: CCCV, 2.25A (0.5C), 4.20V, 225mA cut-off (approx. 150 min)
• Rated Fast Charge: CCCV, 6A, 4.20V, 100mA cut-off (approx. 75 min)
• Max. Charge Current: 6A (continuous charge) / 9A (for step charge)
• Discharge Cut-off Voltage: 2.5V (End of discharge)
• Max. Continuous Discharge: 35A (without temperature cut) / 50A (with 80°C temperature cut)
• Cycle Life: ≥ 2700mAh after 250 cycles at 35A discharge (or after 100 cycles at 50A discharge with 80°C cut-off)
• Operating Temperature: Charge: -10°C to 60°C; Discharge: -20°C to 60°C
• Storage Temperature: 1 year: -20°C to 23°C; 3 months: -20°C to 45°C; 1 month: -20°C to 60°C
• Maximum Cell Dimensions: Diameter: Max. 21.35 mm × Height: Max. 70.62 mm
• Cell Weight: Max. 72.0 g
• Applications: Cordless power tools, RC models, high-drain electric skateboards, e-bikes, robotics, and custom DIY battery packs

Package Includes

• Samsung INR21700-45T 4500mAh 35A battery cells, quantity chosen from 1, 10, 20, 50, or 100 PCS
• Protective packaging / cell box
• User manual and battery safety guide

Choose Your Ideal Power Bundle

• 1 PCS – Quick Replacement & Testing: Single cell for tool testing, flashlight upgrade, or individual cell repair
• 10 PCS – Cordless Tool Pack Rebuilds: Perfect for rebuilding heavy-duty power tool battery packs (drills, grinders, saws)
• 20 PCS – High-Output Modules: Ideal for RC models, robotics, and compact high-drain DIY power packs
• 50 PCS – Mobility & Energy Modules: Tailored for high-performance electric skateboards, e-bikes, and portable power stations
• 100 PCS – Master Builder Bulk Set: Best value for workshops, custom pack assemblers, and volume battery builders

Purchasing in bundles ensures matched cell batches for balanced series and parallel assembly.

180-Day Warranty & Customer Support

Every cell batch supplied by DXF POWER is covered by a 180-day manufacturer warranty against defects in materials and craftsmanship. Our technical support team is always available to assist with charging parameters, pack layout recommendations, and safety practices.

Usage & Safety Guidelines

• Use a dedicated lithium-ion smart charger supporting CC/CV charging mode.
• Never charge above 4.20V per cell or discharge below 2.5V per cell.
• Do not exceed cell surface temperature of 80°C during heavy continuous discharge.
• Always inspect cell outer shrink wrap, insulator ring, and terminals for damage before use; rewrap immediately if damaged.
• Never carry loose 21700 batteries in pockets, bags, or purses with metal objects like keys or coins; always store in an insulated battery case.
• Do not short-circuit, crush, incinerate, puncture, or submerge cells in water.
• Store batteries at 3.60V–3.85V per cell in a cool, dry, well-ventilated location away from direct sunlight.
• When building multi-cell packs, always integrate a quality Battery Management System (BMS) with over-current, over-charge, over-discharge, and thermal balance protection.

Why Choose DXF?

• Genuine Grade-A Samsung SDI 45T cells with true 4500mAh capacity and 35A/50A high-drain output
• Tested continuous discharge performance under demanding operational loads
• Carefully matched batches for balanced series and parallel pack assembly
• Strict factory pre-shipment quality checks and secure protective packaging
• Global warehouse logistics network and professional technical customer support

Perfect For

Engineered for contractors, RC hobbyists, e-mobility builders, and DIY pack fabricators demanding high 4500mAh capacity and extreme 35A/50A continuous discharge for high-power cordless tools, electric skateboards, robotics, and custom energy modules.

Power your projects with trusted Samsung 21700 performance. Learn more about setups and battery care on the DXF YouTube channel.

The Samsung INR21700-58E 5500mAh 11A Continuous Discharge Li-ion Rechargeable Battery represents the cutting edge of energy density in the 21700 form factor. Manufactured by Samsung SDI and supplied by DXF POWER with strict quality grading, this flat-top unprotected cell delivers a massive 5500mAh typical capacity (5330mAh minimum) on a 3.64V nominal platform with a reliable 11A constant continuous discharge rating. Engineered for maximum runtime per charge, long cycle life, and excellent thermal stability, the 58E is the premier high-capacity power cell for electric bicycles (e-bikes), electric scooters, long-range LED torches, robotics, and custom DIY battery packs.

Watch DXF Batteries in Action

Key Features

• Genuine Samsung SDI 58E Cell: Authentic Grade-A 21700 cylindrical cell engineered by Samsung SDI for class-leading energy density and endurance
• 11A Constant Continuous Discharge: Delivers true 11A continuous current output for dependable energy delivery in electric mobility and power packs
• 5500mAh Ultra-High Capacity: 5500mAh typical (5330mAh minimum) offers exceptional operating runtime for long-distance transport and lighting
• CC-CV Fast Charging Support: Charges to 4.20V with up to 5,500mA maximum charging constant current
• Standard 21700 Bare Cell Format: Flat-top design (21.78 mm maximum diameter × 71.0 mm maximum height) optimized for spot-welded custom battery packs
• Multiple Pack Bundles: Available in 1, 10, 20, 50, and 100 piece packages for single cell replacements or large-scale pack fabrication
• Strict Factory Quality Testing: Cells are inspected for voltage balance, internal resistance, and capacity consistency across every batch

Specifications, Per Battery

• Brand / Manufacturer: Samsung SDI (Supplied by DXF POWER)
• Model / Part No.: INR21700-58E (58E)
• Cell Type: 21700 Cylindrical Rechargeable Lithium-ion (Li-ion)
• Positive Pole: Flat (Flat Top)
• Protection Circuit: None (Unprotected industrial bare cell; requires compatible device-level or pack-level protection)
• Typical Capacity: 5500mAh
• Minimum Capacity: 5330mAh (at 0.2C discharge to 2.5V after standard charge)
• Nominal Voltage: ≤ 3.636V (3.64V)
• Charging Method: CC-CV
• Charging Voltage: 4.20V
• Max. Charging Constant Current: 5,500mA (5.5A)
• Discharge Cut-off Voltage: 2.50V
• Continuous Maximum Discharge Current: 11A
• Storage Temperature: 1 year: -20°C to 23°C; 3 months: -20°C to 45°C; 1 month: -20°C to 60°C
• Maximum Dimensions: Diameter: 21.78 mm (max) × Length: 71.0 mm (max)
• Weight (Max.): 74 g
• Applications: Electric bicycles (e-bikes), electric scooters, high-lumen flashlights, robotics, portable energy storage, and custom DIY battery packs

Package Includes

• Samsung INR21700-58E 5500mAh 11A battery cells, quantity chosen from 1, 10, 20, 50, or 100 PCS
• Protective packaging / cell box
• User manual and battery safety guide

Choose Your Ideal Power Bundle

• 1 PCS – Quick Replacement & Testing: Single cell for flashlight upgrade, tool testing, or individual cell repair
• 10 PCS – Small Pack Rebuilds: Perfect for rebuilding portable power banks and handheld devices
• 20 PCS – Auxiliary & Mobility Modules: Ideal for 24V/36V auxiliary modules, robotics, and compact DIY power packs
• 50 PCS – E-Bike & Scooter Battery Packs: Tailored for ultra-high capacity 36V/48V electric bike packs, e-scooters, and portable energy stations
• 100 PCS – Volume Pack Assembly: Best value for workshops, custom pack assemblers, and volume battery builders

Purchasing in bundles ensures matched cell batches for balanced series and parallel assembly.

180-Day Warranty & Customer Support

Every cell batch supplied by DXF POWER is covered by a 180-day manufacturer warranty against defects in materials and craftsmanship. Our technical support team is always available to assist with charging parameters, pack layout recommendations, and safety practices.

Usage & Safety Guidelines

• Use a dedicated lithium-ion smart charger supporting CC/CV charging mode up to 4.20V.
• Never charge above 4.20V per cell or discharge below 2.50V per cell.
• Never exceed the maximum continuous discharge current of 11A.
• Always inspect cell outer shrink wrap, insulator ring, and terminals for damage before use; rewrap immediately if damaged.
• Never carry loose 21700 batteries in pockets, bags, or purses with metal objects like keys or coins; special insulated battery cases are recommended.
• Do not short-circuit, crush, incinerate, puncture, or submerge cells in water.
• Store batteries at 3.60V–3.85V per cell in a cool, dry, well-ventilated location away from direct sunlight.
• When building multi-cell packs, always integrate a quality Battery Management System (BMS) with over-current, over-charge, over-discharge, and thermal balance protection.

Why Choose DXF?

• Genuine Grade-A Samsung SDI 58E cells with authentic 5500mAh capacity and 11A continuous output
• Tested continuous discharge performance and high energy density
• Carefully matched batches for balanced series and parallel pack assembly
• Strict factory pre-shipment quality checks and secure protective packaging
• Global warehouse logistics network and professional technical customer support

Perfect For

Engineered for e-mobility builders, DIY pack fabricators, contractors, and flashlight enthusiasts demanding maximum 5500mAh capacity, reliable 11A continuous output, and long cycle durability for electric bikes, e-scooters, robotics, and custom energy storage modules.

Power your projects with trusted Samsung 21700 performance. Learn more about setups and battery care on the DXF YouTube channel.