Features 1、This module can protect lithium battery from burnout during charging or discharging. 2、Provide many protection functions against over-current, overvoltage, short circuit, over-temperature protection. 3、Suitable for 3.7V or 4.2V lithium battery. 4、The module is made with high quality electronic components, reliable and stable. 5、Reasonable layout, easy to wire and use. Specification Features: 1. This module can protect lithium battery from burnout during charging or discharging. 2. Provide many protect functions against over-current, overvoltage, short circuit, over-temperature protection. 3. Suitable for 3.7V or 4.2V lithium battery. 4. The module is made with high quality electronic components, reliable and stable. 5. Reasonable layout, easy to wire and use. Specification: Charging voltage: DC 4.5V-5.5V (DC 5V recommended) Charging current : 0-2.1A Charging quiescent current : 100uA Discharge current: 0-2.4A; Discharge quiescent current : 50uA Discharge efficiency: up to 96% Output current: 0-2.1A; Ambient temperature: -20℃-85℃ Protect function: OCP, OVP, SCP, OTP Wiring: GND connect to battery negative VIN connect to battery positive VOUT Connect to the positive output+ GND Connect to the positive output- Package List: 1 * Lithium Battery Charger Module Package List