21700 Li-ion Cell 4000mAh 3.7V (Single)

21700 3.7V 4000mAh Rechargeable Lithium-Ion Cell

The 21700 cell is the modern standard for electric vehicles and high-performance power tools, packing 50% more energy than standard 18650 cells. Rated at 3.7V 4000mAh with continuous high-drain capability up to 30 Amperes.

Specifications

• Dimensions: 21700 cylindrical (21 mm diameter × 70 mm length)
• Nominal Voltage: 3.7V (Max charge: 4.2V, Cut-off: 2.5V)
• Nominal Capacity: 4000 mAh (14.8 Watt-hours)
• Max Continuous Discharge: 30 Amperes high-drain
• Internal Resistance: ≤ 12 mΩ
• Cycle Life: ≥ 800 cycles to 80% original capacity