CIRCLE 2 RECHARGEABLE BATTERY accessory works as a backup battery solution for your Wire-Free Camera, quickly swap out your existing Circle 2 Wire-Free Camera battery to reduce any down time in between charges WORKS WITH Circle 2 Wire-Free Camera only, NOTE: this accessory does not work with the Circle 2 Wired Camera CHARGE TIME is approximately 4-hours when the Rechargeable Battery is not attached to the camera and is plugged in using the provided USB power adapter EASY SETUP - Fully charge the Rechargeable Battery accessory before use (LED indicator turns green), remove the existing battery attached to your Wire-Free Camera and replace the battery on your camera with the new fully charged battery