21700 3S1P Battery Pack Overview
The 21700 3S1P battery pack 10.8V is a compact and efficient lithium battery solution designed for portable and medium-power applications. Built using 21700 cylindrical battery cells, it provides higher energy density and stable performance.
Configured in a 3S1P structure (three cells in series), this battery pack delivers a stable 10.8V output, making it suitable for consumer electronics, portable devices, and small power equipment. Compared with multi-parallel battery packs, the 3S1P configuration offers a more lightweight and compact design while maintaining reliable power output.
Key Features
High Capacity: A 10400mAh battery capacity ensures long battery life for high-power applications.
Stable Voltage: A nominal 3.6V provides stable, reliable performance.
Compact Design: Measuring only 63.5mm x 21.2mm x 73mm and weighing just 220g, it is easy to integrate into a variety of devices.
Durable Chemistry: The ternary lithium battery structure supports long cycle life and higher energy density, ensuring a stable power supply over extended periods.
Three-Cell Battery Assembly: The 3S1P configuration (3 cells in series, 1 cell in parallel) delivers higher voltage and greater energy for demanding devices.
Cylindrical Form Factor: The standard 21700 size ensures compatibility with a wide range of industrial and consumer electronics devices.
Application Areas of 21700 3S1P Battery Pack
Portable electronic devices using 21700 3S1P battery packs
Smart home equipment and IoT devices
Consumer electronics such as speakers and handheld devices
Medical monitoring equipment requiring stable lithium battery power
Small power tools and compact industrial devices
Electrical Characteristics
| No. | Item | Parameter | Remark |
| 1 | Rating Voltage | 3.6V | |
| 2 | Minimum Capacity | 10400mAh | 0.2C discharge after full charge |
| Typical Capacity | 10000mAh | ||
| 3 | Charge Voltage | 4.2V | |
| 4 | Impedance | 100mΩ (Max) | |
| 5 | Charging Mode | C.C/C.V. (Constant Current / Constant Voltage) | Voltage conversion based on battery voltage |
| 6 | Charging Method | Standard Charging 0.2C | Charging Current 100mA |
| Max Charging 0.5C | |||
| 7 | Discharging Method | Standard Discharging 0.2C | Max Discharging 0.5C |
| 8 | Charging Time | Standard Charging | 10 Hours |
| Fast Charging | 5 Hours | ||
| 9 | End of Discharge Voltage | 2.40±0.10V | |
| 10 | Overcharge Voltage | 4.30±0.05V | |
| 11 | Over Discharge Cut-Off Voltage | 2.40±0.10V | |
| 12 | Overcurrent Protection | 4.5-8.5A | |
| 13 | Short Circuit Protection | Recover after removing the short-circuit load | |
| 14 | Operating Consumption Current | 10uA (Max) | |
| 15 | Operating Temperature | Charging: 10~45°C | Discharging: -20~60°C |
| 16 | Storage Temperature | -20°C – 60°C | Storage capacity should be 40%~50% full charge |
| Recommended: 25±5°C | |||
| 17 | ID Resistor | / | |
| 18 | NTC Resistor | / | |
| 19 | ESD Test | ±3KV | |
| 20 | Cycle Life | 300 cycles |
Battery Configuration
| No. | Item | Type | Qty |
| 1 | Cell | 18650 | 3 |
| 2 | PCM Protection Board | XR-3575-5M | 1 |
| 3 | Wire | 3239 National Standard 22# red 80mm, black 80mm, 50mm exposed |
This product is ideal for custom lithium battery solutions in portable electronics, industrial equipment, and OEM applications. Contact us for bulk orders and customized battery pack designs.
⚡ Battery Electrical Characteristics ⚡
| No. | Item | Parameter | Remark |
|---|---|---|---|
| 1 | Rating Voltage | 3.6V | |
| 2 | Minimum Capacity | 10400mAh | 0.2C discharge after full charge |
| Typical Capacity | 10000mAh | ||
| 3 | Charge Voltage | 4.2V | |
| 4 | Impedance | 100mΩ (Max) | |
| 5 | Charging Mode | C.C/C.V. (Constant Current / Constant Voltage) | Voltage conversion based on battery voltage |
| 6 | Charging Method | Standard Charging 0.2C | Charging Current 100mA |
| Max Charging 0.5C | |||
| 7 | Discharging Method | Standard Discharging 0.2C | Max Discharging 0.5C |
| 8 | Charging Time | Standard Charging | 10 Hours |
| Fast Charging | 5 Hours | ||
| 9 | End of Discharge Voltage | 2.40±0.10V | |
| 10 | Overcharge Voltage | 4.30±0.05V | |
| 11 | Over Discharge Cut-Off Voltage | 2.40±0.10V | |
| 12 | Overcurrent Protection | 4.5~8.5A | |
| 13 | Short Circuit Protection | Recover after removing the short-circuit load | |
| 14 | Operating Consumption Current | 10uA (Max) | |
| 15 | Operating Temperature | Charging: 10~45°C Discharging: -20~60°C |
|
| 16 | Storage Temperature | -20°C ~ 60°C | Storage capacity should be 40%~50% full charge |
| Recommended: 25±5°C | |||
| 17 | ID Resistor | / | |
| 18 | NTC Resistor | / | |
| 19 | ESD Test | ±3KV | |
| 20 | Cycle Life | 300 cycles |
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