The 21700 Li-ion 3.7V 5000mAh Rechargeable Battery by CJ is a high-capacity, cylindrical lithium-ion cell designed for reliable performance in demanding applications. With a nominal voltage of 3.7V and a actual capacity of 4500mAh, it provides long-lasting power for portable electronics, battery packs, DIY energy storage projects, and high-drain devices. Built with a 1C discharge rating, this battery ensures stable output and efficient energy delivery, making it suitable for power tools, e-bikes, robotics, and backup systems. Its 21700 form factor combines higher capacity with compact size, offering an upgrade over traditional 18650 cells.

Features of 21700 Li-ion 3.7V 5000mAh Rechargeable Battery:

1. High-capacity 5000mAh lithium-ion cell for extended runtime
2. 1C discharge rate for reliable high-current applications
3. Nominal voltage of 3.7V with stable performance
4. Rechargeable and reusable for long cycle life
5. Standard 21700 cylindrical form factor for easy integration

Specifications of 21700 Li-ion 3.7V 5000mAh Rechargeable Battery:

• Model: 21700 Li-ion Rechargeable Battery – Chengjiang
• Cell Type: Lithium-ion (Rechargeable)
• Nominal Voltage: 3.7V
• Actual Capacity: 4000 - 4200mAh (approx)
• Discharge Rate: 1C (max continuous)
• Standard Charge Voltage: 4.2V
• Cut-off Discharge Voltage: 2.5V
• Size (Diameter × Length): 21 × 70 mm (approx.)
• Weight: Approx. 70 g

Package Includes:

1 × 21700 Li-ion 3.7V 5000mAh Rechargeable Battery