To charge your headset, plug the USB cable into the headset's micro USB port and connect to USB power source. When you’re not in a call, press the Volume Up and Volume Down buttons together in standby mode to hear how much battery talk-time is left on your headset.
Note: Fully charge the headset before you use it.
Tip: To save battery power, turn off the headset when you’re not using it. The status light can also be used to determine remaining talk-time:
Green = Battery full;
Yellow = Around 50% charged;
Red = Battery low.
Caution: Your battery is designed to last the life of your device. It should only be removed by a recycling facility. Any attempt to remove or replace your battery will damage the device, void your warranty, and could cause injury.