3.7V 4500 mAh Lithium Batteries 21700
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Model: Hanery 21700-4500
Stepping into the high-capacity tier of the 21700 format, the Hanery 21700-4500 delivers an impressive 4500mAh of energy. This cell is designed for applications where extended endurance is the primary goal, but a moderate footprint is still required. It is an excellent choice for long-range e-bikes, advanced robotics, and portable medical equipment, offering a significant boost in operational time between charges.
High Energy Density: Packs 4500mAh into a single 21mm x 70mm cylindrical cell.
Extended Endurance Focus: Designed to maximize runtime for devices that cannot be frequently recharged.
Space-Efficient Capacity: Achieves high total pack capacity with fewer cells than 18650-based designs.
Consistent Power Delivery: Provides a stable discharge curve throughout its long operational cycle.
Durable Construction: Manufactured with premium materials for long-term reliability in the field.
Ideal for Large Packs: Perfect for assembling high-capacity energy storage modules or large EV batteries.
Please note that we have a MOQ for our battery. For batteries in stock, the MOQ is 10,000 pcs. For customized batteries, the MOQ is 50,000 pcs.
Hanery assists you throughout your project: battery size, capacity, discharge multiplier, operating temperature, safety, and associated protection circuitry. Please contact us or mark your requirements on the inquiry quotation.
Order single or thousands of items at a time. Our warehouse and flexible shipping options are available for last-minute, deadline critical orders.
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*Customization is always available, please mark down your need in form or just contact us.
Battery Specification
1. Mechanical Characteristics
| Cell | 21700 | PCM | No |
| NTC | No | Weight | appr. 70.0g |
| Configuration | 1S1P |
2. Electrical Specification
| Capacity | 4500mAh | Nominal Voltage | 3.7V |
| Energy | 16.65Wh | Internal Resistance | less than 23 mΩ |
| Max. Charge Voltage | 4.2V | Discharge Cut Off | 2.75V |
| Max. Charge Current | 2250mA | Max. Discharge Current | 9000mA |
| Standard Charge Current | 900mA | Standard Discharge Current | 900mA |
| Charging Temperature | 0℃ to 45℃ | Discharging Temperature | -20℃ to 60℃ |
| Storage Temp.Range | 1 year at -20℃ to +30℃ 3 mos. at -20℃ to +45℃ 1 mo. at -20℃ to +60℃ | Cycle life | 100 cycles ≥92% 300 cycles ≥88% 500 cycles ≥80% |
3. Cell protection
| Overcharge Detection | No | Overdischarge Detection | No |
| Overcurrent Detection | No | Short protection | No |
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