Features: 1. The red light flashes when charging, and the red light is always on to indicate full. 2. A single-chip solution designed for mobile power, with integrated management module, discharge management module, power detection and LED indicator module and protection module. 3. Built-in charging and discharging power MOS, charging current can be set, Z large charging current and Z large discharging current 1A. 4. It integrates almost all protection functions such as constant temperature charging operation mode, over temperature protection, over and over discharge protection, output over voltage protection, output overload protection, output short circuit protection, etc. to make sure the safety of the chip and lithium ion battery. 5. The application circuit is simple, and charging management and discharge management can be realized with few components. Input Voltage: 3.7V~5.5V Charging Current: Z 1A Output Current: Z is 1A Output Voltage: 5V BAT Discharge Termination Voltage: 2.9V Preset 4.2V Voltage with 1% accuracy Discharge Efficiency: 85% (input 3.7V, output 5V/1A) Package List: 10 * Step Up Power Supply Module