3.7V 300mAh Li-Po BatteryLithium Polymer (LiPo) Battery Single Cell Rechargeable Battery for DIY Projects RC Toys and Wearable Devices(Silver)

Description

This compact, single-cell lithium-polymer (LiPo) rechargeable battery is designed for small electronic devices, wearables, IoT modules, and portable systems where space and weight are critical. With a nominal voltage of 3.7 V and a capacity in the 300 mAh class, it can support low-to-moderate power loads over extended periods when paired with efficient power management.

It is well-suited for devices such as small sensors, wireless modules, microcontroller-based gadgets, compact audio modules, small drones, or medical/healthcare wearables. Its thin, flat prismatic design makes it easy to integrate into tight enclosures. The cell typically supports up to ~500 charge/discharge cycles under optimal conditions. Some versions may include protection circuitry (PCM/PCB) for overcharge, over-discharge, and short-circuit safety.

The operating temperature range is suitable for most consumer and industrial electronics, though charging must be done within a narrower window to ensure safe use. As with all LiPo chemistries, proper charging (using a CC/CV algorithm, setting current limits, and establishing safe cutoff thresholds) and storage practices are crucial for maintaining long battery life and optimal performance.

Specification

• Cell type / Chemistry: Lithium-Polymer (LiPo)
• Nominal voltage: 3.7 V
• Full charge voltage: 4.2 V
• Cut-off voltage: ~2.75 V to 3.0 V
• Capacity: 300 mAh (typical)
• Energy: ~1.11 Wh
• Internal resistance: ~80 mΩ (typical)
• Cycle life: Up to 500 cycles (under standard conditions)
• Operating temperature (discharge): –20 °C to +60 °C
• Charging temperature range: 0 °C to 45 °C
• Storage temperature: –20 °C to +30 °C (long term)
• Protection: Optional PCM/PCB for overcharge, over-discharge, and short-circuit safety
• Weight: ~8–12 g
• Dimensions: 22 × 20 × 5 mm (specified)
• Max continuous discharge current: ~1C (≈ 300 mA)
• Certifications (varies by supplier): UN38.3, CE, RoHS, etc.
• Applications: Wearables, IoT modules, small drones, sensors, compact portable electronics

FAQ

Q1: What is the voltage of this battery?

A: The battery has a nominal voltage of 3.7 V and charges fully up to 4.2 V.

Q2: What is the capacity?

A: It has a typical capacity of 300 mAh, suitable for small electronics and IoT devices.

Q3: What are the dimensions?

A: The battery measures 22 × 20 × 5 mm, making it compact and easy to fit into tight enclosures.

Q4: How many charge cycles does it support?

A: It typically supports up to 500 charge/discharge cycles under proper use.

Q5: Does it come with protection circuitry?

A: Some versions include PCM/PCB for safety, but if not, external protection should be used.

Q6: What are the main applications?

A: Commonly used in wearables, IoT modules, small drones, wireless gadgets, and portable electronics.