3.7V 1200mAh 103040 LiPo Battery for Compact Devices

The 103040 3.7V 1200mAh lithium polymer battery is designed for compact electronic devices that need a higher capacity option within a limited installation space. With a nominal energy of 4.44Wh and a maximum size of approximately 10 × 30 × 42 mm, it provides a practical balance between runtime, size, and integration flexibility.

Selecting a LiPo battery requires more than checking voltage and capacity. Engineers should also evaluate device power consumption, charging design, available battery space, connector requirements, protection configuration, operating temperature, and expected service time before integrating the 103040 battery.

Part 1. Why is the 103040 3.7V 1200mAh LiPo battery suitable for compact devices?

The 103040 lithium polymer battery uses a compact pouch-cell format with a maximum dimension of approximately 10 × 30 × 42 mm. Its rectangular design helps engineers use available enclosure space efficiently while maintaining a practical 1200mAh capacity.

• Compact pouch format – suitable for products where battery thickness and footprint are limited.

• Higher capacity in a small package – provides 1200mAh capacity for longer operating time than smaller 800mAh–1000mAh cells.

• Flexible integration – suitable for handheld electronics, smart devices, portable instruments, and rechargeable equipment.

• Single-cell 3.7V design – works with standard lithium battery charging systems using a 4.2V maximum charge voltage.

Before selecting the 103040 battery, confirm the available installation space, battery compartment size, required runtime, charging circuit, connector type, and polarity.

Part 2. How long can a 3.7V 1200mAh 103040 battery run?

A 1200mAh battery can theoretically provide 1200mA for one hour. Actual runtime depends on the device’s average current consumption, system efficiency, operating temperature, battery aging, and discharge settings.

• 100mA average load: approximately 12 hours theoretically

• 200mA average load: approximately 6 hours theoretically

• 500mA average load: approximately 2.4 hours theoretically

• 1000mA average load: approximately 1.2 hours theoretically

These values are theoretical estimates based on rated capacity. In real products, additional margin should be considered for power conversion losses, peak current demand, temperature changes, battery aging, and the required remaining capacity.

Part 3. How should the 103040 battery be matched with the device power system?

The device charging and power system should operate within the electrical specifications of the 103040 battery. The battery provides a nominal voltage of 3.7V and requires a lithium-ion charging system with a maximum charge voltage of 4.2V.

• Nominal voltage: 3.7V

• Nominal capacity: 1200mAh

• Nominal energy: 4.44Wh

• Maximum charge voltage: 4.2V

• Typical charge current: 0.5C to 1C

• Typical discharge current: 0.5C to 1C

• Internal resistance: less than 180mΩ

• Discharge cut-off voltage: 2.75V

If the device requires higher current output or special discharge performance, another battery configuration should be evaluated according to the actual load profile.

Part 4. What protection, connector, and wiring options are available for the 103040 battery?

The standard 103040 LiPo battery includes PCM protection to help manage abnormal conditions such as overcharge, overdischarge, overcurrent, and short circuit. The battery interface should also match the device-side connector and installation requirements.

• PCM protection: included in the standard configuration

• Overcharge protection: supported

• Overdischarge protection: supported

• Overcurrent protection: supported

• Short-circuit protection: supported

• Connector and wire: can be customized according to device interface, current requirement, and installation space

For OEM projects, Ufine can support customization of connector type, wire length, wire gauge, PCM configuration, and other battery pack requirements.

Part 5. What temperature and storage conditions apply to the 103040 battery?

The 103040 lithium polymer battery has different temperature limits for charging, discharging, and storage. Therefore, each operating condition should be considered separately during product design.

• Charging temperature: 0°C to 45°C

• Discharging temperature: -20°C to 60°C

• Storage up to 1 year: -20°C to +30°C

• Storage up to 3 months: -20°C to +45°C

• Storage up to 1 month: -20°C to +60°C

Avoid charging outside the recommended temperature range. The battery should also be protected from mechanical damage, short circuits, fire, and other conditions that may affect pouch-cell safety and performance.

Part 6. When should you choose another 3.7V LiPo battery instead of the 103040?

The 103040 battery is a balanced solution for compact devices, but it may not fit every application. Another LiPo battery format may be more suitable when the required capacity, dimensions, current demand, or installation method is different.

• More capacity is required: choose a larger battery size when additional installation space is available.

• Thinner battery thickness is required: compare ultra-thin LiPo formats designed for limited-height enclosures.

• Smaller footprint is required: select a shorter or narrower pouch-cell design.

• Higher discharge performance is required: evaluate batteries designed for higher current applications.

• Special environmental conditions apply: consider customized low-temperature or high-temperature battery solutions.

If the standard 103040 configuration does not match your device requirements, compare other 3.7V LiPo batteries by size and capacity, or provide your application details for engineering evaluation.