The Sony VTC6A US21700VTC6A 4000mAh 30A Continuous Discharge Li-ion Rechargeable Battery is an industry-benchmark high-capacity, high-drain 21700 cylindrical power cell manufactured by Sony / Murata and supplied by DXF POWER with strict quality grading. Designed for extreme continuous output, this flat-top bare cell delivers a generous 4000mAh nominal capacity on a 3.6V platform with a massive 30A constant continuous discharge rating (and up to 40A continuous when monitored with an 80°C temperature cut). Renowned for its ultra-low internal resistance (~0.03 Ω), outstanding voltage retention under heavy amp draw, and robust thermal stability, the VTC6A is the premier choice for heavy-duty cordless power tools, RC models, electric skateboards, e-bikes, robotics, and custom DIY battery packs.

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Key Features

• Genuine Sony / Murata VTC6A Cell: Authentic Grade-A 21700 cylindrical power cell acclaimed for its superior balance of 4000mAh capacity and high-drain power delivery
• 30A Continuous Discharge: Delivers true 30A constant continuous discharge current without thermal cut-off (and up to 40A continuous with 80°C thermal protection)
• 4000mAh High Capacity: 4000mAh nominal capacity provides substantial runtime for power-hungry devices
• Ultra-Low Internal Resistance: Measured at approx. 0.03 Ω for minimal voltage sag and efficient energy delivery under high load
• Standard 21700 Flat-Top Design: Dimensions of 21.2 mm diameter × 69.6 mm length with metal bottom and flat top terminal, optimized for custom spot welding
• 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: Sony / Murata (Supplied by DXF POWER)
• Model / Part No.: US21700VTC6A (VTC6A)
• Cell Format: 21700 Cylindrical Rechargeable Lithium-ion (Li-ion)
• Positive Pole: Flat (Flat Top)
• Protection Circuit: Without (Unprotected industrial bare cell; requires compatible device-level or pack-level protection)
• Nominal Capacity: 4000mAh
• Nominal Voltage: 3.6V
• Max. Continuous Discharge Current: 30A (up to 40A with 80°C temperature cut)
• Charging Voltage: 4.2V (Termination current: 0.1A)
• Charging Method: Constant Current / Constant Voltage (CC-CV)
• Calculated Internal Resistance: Approx. 0.03 Ω
• Cell Dimensions: Diameter: 21.2 mm × Length: 69.6 mm
• Cell Weight: 72.1 g
• Applications: Cordless power tools, RC models, electric skateboards, e-bikes, robotics, and custom DIY battery packs

Package Includes

• Sony VTC6A US21700VTC6A 4000mAh 30A 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 cordless 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 energy 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 up to 4.20V.
• Never charge above 4.25V per cell or discharge below 2.50V 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 Sony / Murata VTC6A cells with true 4000mAh capacity and 30A/40A 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 dependable 4000mAh capacity and extreme 30A/40A continuous discharge for high-power cordless tools, electric skateboards, robotics, and custom energy modules.

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