7.4V 3500mAh 2S1P 18650 Li ion Battery Pack
The 7.4V 3500mAh 2S1P Rechargeable Battery Pack solves the dual challenge of achieving higher energy density and robust safety in compact devices. Moving beyond standard options, its core innovation lies in a seamlessly integrated BMS. This intelligent system not only ensures stable output for maximum runtime but also continuously monitors cell health, providing critical protections against over-charge, over-discharge, and short circuits. The result is a power source you can trust for sensitive applications, significantly mitigating operational risks and enhancing end-user safety.
Key features：
- Engineered to deliver 3500mAh of stable power, extending operational duration and reducing maintenance intervals for continuous-use devices.
- An integrated BMS provides triple-layer protection against overcharge, over-discharge, and overcurrent, ensuring complete operational safety and durability.
- Certified cells ensure that each pack delivers unwavering performance.
| No. | Item | Parameter | Remark |
|---|---|---|---|
| 1 | Nominal Voltage | 7.4V | 3.7V/Cell |
| 2 | Nominal Capacity | 3500mAh | @0.2C |
| 3 | Minimum Capacity | 3350mAh | |
| 4 | Shipment Voltage | / | |
| 5 | Initial Internal Impedance | ≤80mΩ | AC 1KHZ |
| 6 | Standard Charge Voltage | 8.4V | 4.2V/Cell |
| 7 | Standard Charge Current | 1.75A | @0.2C |
| 8 | Max. Charge Current | 3.5A | |
| 9 | Standard Discharge Current | 0.7A | |
| 10 | Max. Discharge Current | 7A | |
| 11 | Burst Discharge Curren | 17.5A | ≤5ms |
| 12 | Discharge Cut-off Voltage | 5V | 2.5V/Cell |
| 13 | Cycle Life | ≥500cycles | Retention: ≥80% |
| 14 | Charge Temperature | 0°C~+45°C | Max Charge |
| 15 | Discharge Temperature | -20°C ~+60°C | Standard Discharge |
| 16 | Storage Temperature | -20°C~ +45°C | ≤3 months |
| -20°C~ +25°C | ≤1 year | ||
| 17 | Weight | About 108 | g |
| 18 | Special Request |
7.4V 3500mAh 18650 Battery Pack FAQs
Do you offer samples or small-batch orders for prototyping?
Yes. We support prototype development with sample units and flexible small-batch orders, allowing you to validate performance and compatibility before moving to mass production.
How is product consistency maintained in volume orders?
We implement strict quality control throughout production, including batch-level cell matching, capacity verification, and safety tests. This ensures every unit delivered meets the same high standards for performance and reliability.
What certifications and testing support do you provide?
We offer comprehensive support for international certifications including UN38.3, IEC 62133, and others applicable to medical devices. Customers also receive detailed test reports and MSDS documentation upon request.
What is the typical cycle life of this battery pack?
Under normal use conditions, the battery provides over 500 full charge-discharge cycles while maintaining more than 80% of its original capacity, supporting long-term usability in professional environments.
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.
