Original BAK N21700CG 5000mAh 2C Rechargeable Li-ion Battery Cell High Capacity 3.6V 21700 Lithium Iron Batteries for Flashlight
High capacity 3.6V 21700 lithium iron batteries designed for flashlights and consumer electronics applications.
| Attribute | Value |
|---|---|
| Battery Type | 21700 Rechargeable Li-ion |
| Nominal Capacity | 5000mAh (0.2C)/min |
| Nominal Voltage | 3.6V |
| Max Charge Voltage | 4.2V |
| Dimensions | 70.75*21.4 (mm) Max |
| Weight | ≤70g |
| Warranty | 12 Months |
- Higher energy density for increased capacity
- 3C discharge rate capability
- Standard charge current: 0.2C
- Max charge current: 1C (at 25℃)
- Cycle life: 500 cycles
- Internal resistance: ≤30mΩ
- Charging mode: CC/CV
| Parameter | Range |
|---|---|
| Charging Temperature | 0~45℃ |
| Discharging Temperature | -20 ~ 60℃ |
| Storage Temperature | ≤1 month: 45~60℃ ≤3 months: 25~45℃ ≤12 months: -20~25℃ |
| Humidity Range | 0~60% (non-condensing) |
The battery pack can be customized according to customer requirements, including:
- Custom voltage, capacity, size and case
- Custom connect plugs, sockets, and cables
- Waterproof solutions
- Special battery packs for any application
- Custom BMS with specific charging/discharging current and balance functions
- High energy density with potential for higher capacities
- No prolonged priming needed - one regular charge is sufficient
- Low self-discharge (less than half of nickel-based batteries)
- Low maintenance - no periodic discharge needed and no memory effect
- Capable of providing very high current for power tools
Passed rigorous safety tests including drop shock, impact, squeeze, soak, bonfire, over-charge, and over-discharge. Features stable chemical structure with no leakage, venting, disassembly, rupture or fire.
With 20 years of design and production experience in battery pack assembly, Shenzhen BAK Technology Co Ltd specializes in rechargeable battery packs and circuit protection systems. Our ISO 9001 and ISO 14001 certified facility offers:
- Factory direct sales with high-quality product packaging
- Professional PCB/BMS solutions
- OEM & ODM services recognized by top global enterprises
- Excellent technical and after-sales service
We use only qualified battery cells with full-function PCB/BMS and strict QC procedures to ensure safety and performance.
Standard warranty is 12 months, with special products negotiable. We conduct pre-production samples and final inspections.
No minimum order quantity. We welcome sample orders to test quality before bulk purchases.
Yes, our professional R&D team can develop solutions according to your specific requirements.
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Have questions about our products or want to discuss a custom order? Our team is ready to help you.