Power Bank Charging Module

* 5 V Micro USB DIY Step up Charging Module with charging Protection(134N3P). It is provided with USB A receptor at one side output and another side is USB Micro B receptor for the input charging source. * Input Supply Voltage: 3.7- 5.5 Volt. * Charging Current : 1 A max. * Output Voltage : 5 V * Size : 21 mm* 17* mm* 10mm