3.7v to 5V 2A Mobile Power Bank DIY 18650 Lithium Battery Charger PCB Board Boost Step Up Module
Description:
Input port: MicroUSB (Andrews mouth)
Input requirements: 5V constant voltage power supply can be done to charge the input power supply, the most matching charger for 5V1A above
Output port: USB
Output parameters: 5V1A/5V2A