The USB Lithium battery charging and boosting circuit board is perfect for DIY power bank with a maximum quiescent current of 8uA.

Micro USB for charging 3.7V Li-ion battery and USB connector with boost circuit for 5V/1A output.

Charging current up to 1A, built-in charging status LED, output current up to 1A, with overvoltage protection, short circuit protection, overload protection.

Input Voltage: 3.7V to 5.5V
Charging current: 1A (max)
Output current: 1A (max)
Output voltage: 5V
Battery charging cut-off voltage: 4.2V ±1%
Battery discharge cut-off voltage: 2.9V ±1%
Discharge efficiency: 85% (input 3.7V output 5V/1A)
Charging: The red light will flash
Fully charged: red light is always on
Standby current: 8uA
Output: overvoltage protection, short circuit protection, overload protection

Describe  :
134N3P is a single-chip solution specially designed for mobile power supply. It integrates charge management module, discharge management module, battery detection and LED indicator module and protection module. 134N3P has built-in charging and discharging power MOS, and the charging current can be set. The maximum charging current and maximum discharging current are 1A. 134N3P integrates almost all safety protection functions such as constant temperature charging mode, over-temperature protection, over-charge and over-discharge protection, output over-voltage protection, output overload protection, and output short-circuit protection to ensure The safety of chips and lithium-ion batteries, and the simple application circuit of 134N3P, can realize charge management and discharge management with only a few components.