High Capacity 7.2V 4000mAh 2S1P 18650 Battery Pack
The high-density 7.2V 4000mAh battery pack packs the power of maximum-capacity 18650 cells into a slim 2S1P configuration. It delivers robust, reliable energy for space-critical applications, enabling longer runtime and seamless integration without performance compromises.
Key features：
- Engineered with premium 18650 cells, each rated at 4000mAh and a 3C discharge rate
- Combines compact dimensions with maximum available capacity in a 2S1P structure.
- Offers flexible connector options, including JST, Molex, and others
- Perfectly suited for powering space-constrained industrial devices
| No. | Item | Specification | Note |
|---|---|---|---|
| 1 | Nominal Voltage | 7.2V | 3.6V/cell |
| 2 | Nominal Capacity | 4000mAh | @0.2C |
| 3 | Minimum Capacity | 3850mAh | / |
| 4 | Initial Internal Impedance | ≤80mΩ | AC 1KHZ |
| 5 | Standard Charge Voltage | 8.4V | 4.2V/cell |
| 6 | Standard Charge Current | 2A | / |
| 7 | Max. Charge Current | 4A | / |
| 8 | Standard Discharge Current | 4A | / |
| 9 | Max. Discharge Current | 12A | / |
| 10 | Burst Discharge Current | 20A | ≤10s |
| 11 | Discharge Cut-off Voltage | 5V | 2.5v/cell |
| 12 | Cycle Life | ≥500cycles | Retention: ≥80% |
| 13 | Charge Temperature | 0°C~+45°C | Standard Charge |
| 14 | Discharge Temperature | -20°C ~+60°C | Standard Discharge |
| 15 | Storage Temperature | -20°C~45°C | ≤3 months |
| -20°C~25°C | ≤1 year | ||
| 16 | Weight | About 140 | g |
7.4V 3500mAh 18650 Battery Pack FAQs
Can the battery pack be customized with specific connectors, cables, or housing?
Yes, we specialize in customization. Beyond standard options like JST and Molex, we can tailor connector types, wire lengths, cable harnesses, and even the outer sleeve or label to meet your device’s specific mechanical and branding requirements.
How do you achieve such a high capacity in a standard 18650 form factor?
We utilize premium-grade lithium-ion cells that employ advanced electrode materials and optimized internal structures.
Is the claimed 4000mAh capacity verified through testing?
Yes. Every batch of cells undergoes rigorous grading and capacity verification testing. Each finished battery pack is 100% tested to ensure its rated 4000mAh with reliability te
How does using the highest capacity cells benefit my overall product design?
By maximizing energy density, you can either:
Extend Runtime: Provide a significantly better user experience without changing the size of your product.
Reduce Size: Achieve the same runtime as a same-capacity pack but in a more compact and streamlined design, giving you greater industrial design flexibility.
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.
