2-power Main Battery Pack - Akku - 47 mAh (2P-WK381)

Small electronic devices often fail because their original battery loses capacity or stops holding a charge. The 2-Power 2P-WK381 is a compact 47 mAh lithium-ion battery pack that restores reliable power to wearables, sensors, and other low-energy electronics. With a nominal voltage of 3.7 V and a single prismatic cell, it delivers consistent performance in a space-saving form factor. Integrated protection against overcharge, over-discharge, and short circuits ensures safe operation, while the wire lead connector allows easy integration into custom or replacement applications.

Who is it for

This battery is ideal for technicians, hobbyists, and OEMs who need a dependable power source for small devices. It suits applications such as fitness trackers, medical sensors, IoT modules, and portable instruments. Its universal compatibility makes it a practical choice for repairs or prototyping where a 3.7 V lithium-ion cell with a 47 mAh capacity is required.

Main features

• Rechargeable lithium-ion chemistry with 47 mAh capacity
• Nominal voltage of 3.7 V and energy capacity of 0.17 Wh
• Single prismatic/pouch cell for compact integration
• Integrated protection circuit for overcharge, over-discharge, and short circuit
• Wire lead connector for flexible installation
• Wide operating temperature range: -20°C to 60°C (discharge)
• CE and RoHS compliant for safety and environmental standards

Specifications

• Battery type: Rechargeable lithium-ion
• Capacity: 47 mAh
• Nominal voltage: 3.7 V
• Energy capacity: 0.17 Wh
• Number of cells: 1
• Chemistry: Li-ion
• Rechargeable: Yes
• Typical cycle life: 300–500 cycles
• Charging voltage limit: 4.2 V
• Discharge cut-off voltage: 3.0 V
• Integrated protection: Overcharge, over-discharge, short-circuit
• Connector type: Wire leads
• Form factor: Prismatic / pouch cell
• Operating temperature (charge): 0°C to 45°C
• Operating temperature (discharge): -20°C to 60°C
• Storage temperature: -20°C to 25°C (recommended for long-term)
• Certifications: CE, RoHS compliant
• Application: Small electronic devices, wearables, sensors
• Product series: 2-power Replacement Batteries

Tips

For optimal lifespan, store the battery at a partial charge in a cool, dry place when not in use. Avoid exposing it to extreme temperatures or puncturing the cell. When soldering wire leads, use a heat sink to prevent damage to the protection circuit. Always verify the voltage and connector polarity match your device before installation.