Answer to: Where is the internal battery? as you change?It is an internal rechargeable battery that is not intended to be replaced. The manual said plug it in for 24 hrs to recharge it or leave a battery attached. It will last for 3 months if the camera is not used. I now just leave a battery attached to the camera and when I took it off and put back on after a week it was keeping the date and time. Hope this helps.