High Discharge Rate 3.7V 8Ah 21700 Battery Pack
Engineered with high-rate lithium cells, this compact battery pack delivers instant surge power (6C+ discharge)—ideal for AGVs, power tools, and heavy-duty equipment facing extreme loads or frequent startups. 3.7V 8Ah 21700 battery packs deliver reliability in high-power environments.
Key features：
- Operation Temperature Range :
Charge: 0 to 60°C
Discharge: -20 to 80°C - Integrated with PCB protection
- Support 50A continuous discharge curent
| No. | Item | Parameter | Remark |
|---|---|---|---|
| 1 | Nominal Voltage | 3.7V | 3.7V/Cell |
| 2 | Nominal Capacity | 8Ah | @0.2C |
| 3 | Minimum Capacity | 7.8Ah | |
| 4 | Shipment Voltage | / | |
| 5 | Initial Internal Impedance | ≤120mΩ | AC 1KHZ |
| 6 | Standard Charge Voltage | 4.2V | 4.2V/Cell |
| 7 | Standard Charge Current | 4A | |
| 8 | Max. Charge Current | 8A | |
| 9 | Standard Discharge Current | 4A | |
| 10 | Max. Discharge Current | 50A | |
| 11 | Burst Discharge Current | 80A | ≤100ms |
| 12 | Discharge Cut-off Voltage | 2.7V | 2.7V/Cell |
| 13 | Cycle Life | ≥350cycles | Retention: ≥70% |
| 14 | Charge Temperature | 0°C~+60°C | Standard Charge |
| 15 | Discharge Temperature | -20°C ~+80°C | Standard Discharge |
| 16 | Storage Temperature | -20°C~ +45°C | ≤3 months |
| -20°C~ +25°C | ≤1 Year | ||
| 17 | Weight | About 0.2 | kg |
3.7V 8Ah 21700 Battery Pack FAQs
Can I replace my existing 18650 battery system with this 21700 pack?
Yes—if your system can accommodate the slightly larger dimensions. We can support customers with a custom housing, connector, and fitment service to help transition from 18650 to 21700 without redesigning the whole system.
Can this battery operate in extreme temperatures?
Yes. 3.7V 8Ah 21700 battery pack is designed to function reliably in harsh conditions, with a discharge temperature range of -20°C to 80°C and a charge range of 0°C to 60°C, making it suitable for both indoor and outdoor environments.
Can I customize this battery pack (e.g., 1S2P, 1S4P, BMS, connectors)?
Of course. In order to match your product design, we allow OEM/ODM customization for different configurations, wire length, connections, labels, and housing materials.
Do you provide testing and certification services?
CM Batteries can help with certifications like UN38.3, IEC62133, and others, and offer testing reports and MSDS.
Is it possible to produce samples or in small quantities?
Yes. We provide a flexible MOQ, which includes small-batch customization and sample orders for prototype testing.
Tailored Customization
Our design team can create custom battery designs for just about any device or machine.
Timely Delivery
Our efficient production and distribution process gets your product delivered in a timely manner.
Quality Guarantee
We stand by our products and guarantee you’ll be happy with your purchase.
