EVE INR21700-40PL 4000mAh 70A Li-ion Battery for Power Tools, E-Bikes & DIY Battery Packs (1-100 PCS)

The EVE INR21700-40PL 4000mAh 70A Continuous Discharge 21700 Li-ion Rechargeable Battery is an ultra-high-drain cylindrical power cell manufactured by EVE Energy and supplied by DXF POWER with strict quality grading. Engineered specifically for high-load industrial machinery and extreme-rate battery pack construction, this flat-top bare cell delivers 4000mAh nominal capacity on a 3.6V nominal platform with an industry-leading continuous discharge capability of up to 70A. Featuring cutting-edge electrode formulation, ultra-low internal impedance, and exceptional heat tolerance, the EVE 40PL delivers sustained current under demanding loads with minimal voltage depression, making it the premier choice for heavy-duty cordless tools, electric racing bikes, electric watercraft, and custom DIY high-output power modules.

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Key Features

• Genuine EVE INR21700-40PL Cell: Authentic Grade-A 21700 cylindrical cell engineered by EVE Energy for extreme-output applications
• 4000mAh High Capacity: Generous 4000mAh capacity provides an ideal balance between sustained high energy density and extreme power delivery
• Extreme 70A Continuous Discharge: Delivers continuous discharge current up to 70A, built to handle heavy motor starts and high-draw demands
• Ultra-Low Internal Resistance: Advanced tab and electrode construction minimizes thermal rise and preserves voltage under heavy loads
• 0.5C–1C Flexible Charging: Supports reliable CC-CV charging from 2.0A (0.5C) up to 4.0A (1C) for efficient recharges
• Standard 21700 Flat-Top Format: Dimensions of 21.1 mm diameter × 70.1 mm length and ~67 g weight, ideal for precision spot welding and pack assembly
• Multiple Pack Bundles: Available in 1, 10, 20, 50, and 100 piece packages for individual tool rebuilds or volume battery pack production
• Strict Factory Quality Testing: Cells are inspected for voltage balance, internal resistance, and capacity consistency across every batch

Specifications, Per Battery

• Brand / Manufacturer: EVE (EVE Energy Co., Ltd. / Supplied by DXF POWER)
• Model / Part No.: INR21700-40PL (40PL)
• Cell Format: 21700 Cylindrical Rechargeable Lithium-ion (Li-ion)
• Cell Chemistry: Lithium-Nickel-Manganese-Cobalt (INR)
• Positive Pole: Flat (Flat Top)
• Protection Electronics: No (Unprotected industrial bare cell; requires compatible high-drain BMS / protection circuit)
• Nominal Capacity: 4000mAh
• Nominal Voltage: 3.6V
• Maximum Voltage (Charge): 4.2V
• Minimum Voltage (Cut-Off): 2.5V
• Discharge Current: Up to 70A continuous
• Charging Current: 0.5C to 1C (approx. 2A to 4A CC-CV)
• Charging Method: Constant Current / Constant Voltage (CC-CV)
• Rechargeable: Yes
• Cell Dimensions: Diameter: 21.1 mm × Length: 70.1 mm
• Cell Weight: Approx. 67 g
• Applications: Extreme-power cordless power tools, electric racing motorcycles, high-wattage e-bikes, electric skateboards, lawn and garden equipment, and custom DIY high-power battery packs

Package Includes

• EVE INR21700-40PL 4000mAh 70A 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 – Single Cell Replacement: Quick replacement for high-drain torches, individual test benches, or handheld tools
• 10 PCS – High-Power Tool Modules: Ideal for building heavy-duty 5-cell / 10-cell 18V-20V cordless power tool packs
• 20 PCS – High-Output Mobile Modules: Perfect for 36V/40V lawn mowers, industrial power equipment, and robotics
• 50 PCS – E-Bike & Motorcycle Battery Packs: Optimized quantity for assembling high-current 48V/60V/72V electric vehicle packs
• 100 PCS – Volume Assembly Bulk Set: Best value for workshops, battery rebuilders, and custom pack manufacturers

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.
• Never exceed the maximum continuous discharge current rating of 70A.
• 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; practical storage in an insulated battery case is essential.
• 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 high-current Battery Management System (BMS) with over-current, over-charge, over-discharge, and thermal balance protection.

Why Choose DXF?

• Genuine Grade-A EVE INR21700-40PL cells with authentic 4000mAh capacity and up to 70A continuous output
• Extreme-rate INR chemistry with ultra-low internal impedance and robust thermal stability
• 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 power tool rebuilders, EV mechanics, and DIY pack fabricators demanding extreme continuous discharge up to 70A, 4000mAh capacity, and ultra-low internal resistance for heavy-duty tools, high-speed electric mobility, and custom energy modules.

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