Battery full, firmware version 2.0: If the camera is turned off for a few hours is, they can not turn back. On the Gopro website describes what to do then. Battery out, SD card in the camera format, firmware on it and there you go. However, the problem persists, so that every time taken out before using the battery and must be reingesteckt again. What a rumgebastel - but not at the price. Since I expect the full function. So look back and by another manufacturer.