This CJ 21700 Lithium-Ion Rechargeable Cell (3.7V – 5000mAh) is a high-performance, high-drain battery suitable for EV battery packs, power banks, e-bike batteries, DIY storage systems, and portable devices.
Designed with stable chemistry and strong durability, it delivers reliable output, long cycle life, and excellent performance under load.

Ideal for battery manufacturers, repair centers, EV builders, and custom lithium pack fabricators.

Key Features

High Capacity: 5000mAh for extended backup time
Stable 3.7V Nominal Voltage
High Drain Performance (suitable for EV & tools)
Long Cycle Life
Low Self-Discharge
Consistent Output for Series & Parallel Packs
Perfect for 12V, 24V, 36V, 48V, 60V & Custom Packs

What’s Included

1 × 21700 Lithium-Ion Cell (3.7V, 5000mAh)
Bulk order available.

Category	Specification
Battery Type	Lithium-Ion (INR/NMC)
Model	21700 Cell
Capacity	5000mAh
Nominal Voltage	3.7V
Full Charge Voltage	4.2V
Cut-Off Voltage	~2.75V
Standard Discharge	3C
Max Continuous Discharge	High-Drain (as per rating)
Cycle Life	500–1000 cycles (based on usage)
Cell Format	21700 (21mm × 70mm)
Application	EV batteries, e-bikes, scooters, solar storage, power banks, DIY battery packs
Protection	Unprotected cell – use BMS