DC 5V 1A 2A Mobile Power Bank Charger Control Board Module Micro USB Polymer Lithium Battery Charging Board DIY Step Up Boost

Product Introduction: 1.Size:69.37*20.54*6.42mm 2.Input:5V 1A 3.Output:5V 1A or 5V 2A 4.Input Interface:V8 port,micro USB 5.Electricity Quantity Display:4 grade LED lamp to display electricity quantity,non-operation state automatic power off 6.Charging Display:when charging 0-25%,the first light will flash,and other lights are off;when charging 25%-50%,the second light will flash,and the first light remains on;when charging 50%-75%,the third light will flash,and the first two lights remain on;when charging 75%-100%,the fourth light will flash,and the first three lights remain on;then the four lights are all on until charging to 100% Notice : 1.Adaptive Battery:3.7-4.2V polymer battery 2.Protection Function:overvoltage protection;overcurrent protection;undervoltage protection 3.Charging Input Requirement:the most advisable is over 5V 1A charger,and any other 5V constant vltage power supply can also be used.