New smart design rapid 3-channel charger allows you to charge your maximum spare batteries anytime. The Charger Input: 5V 2.1A ( can be used Micro USB Cable or Type-C cable); Output: 4.4V 750mA*3. LED indicate: Red light for charging; Green light for standby or full-charge. Easy to carry, Micro USB and Type-C, multiple charging option, come with a Micro USB cable.