18650 UPS charging and discharging integrated module

This is an TP4056 18650 3.7V 4.2V Battery Charging Module with Integrated DC Boost Converter module. The TP4056 is a small single cell lithium battery charging module that also includes a 1A step-up (boost) converter for powering a large range of applications. The module will charge most types of a single cell (3.7) LiPo batteries from either 4 to 7.5V power supply input, or from a standard 5V USB port/adapter. A battery charge and standby LED are also included for visual indication.

The TP4056 is a complete constant-current/constant-voltage linear charger for single celllithium-ion batteries. Its  low external component count make the TP4056 ideally suited for portable applications.