Battery screws directly into the end of the USB charging cable. Connects to the USB port on your computer. Battery not included. This charger can also be plugged into an open USB port for charging. The light on the USB charger lights up blue when it's plugged in. When a depleted battery is attached the light will turn red. When the battery is fully charged the light will turn back to blue. As with all chargers it is best to go by the light on the end of the battery itself. When the battery light is solid the battery is charging. When it turns off charging is completed.
USB Charger w/Cord Specifications: