LEMFO Galaxy S5 Extra Spare Battery Backup Power Charger - Desktop Cradle Battery Charing Dock For Samsung Galaxy SV i9600 Batteries - White With it, you can charge your extra phone battery ahead of time, no need to spare your phone to charge it anymore. Multiply charge method: with a micro USB cable, you can connect it to a power bank/ PC/ AC power(a adaptor is required). The indicator light will flash to indicate the connect is working, and keeps red when charging your phone battery. Once fully charged, the light will turn green. Compatible Models: For Samsung Galaxy S5 Hand-sized body, with built-in over-charge protection.