It has a battery pack built in which lasts 80mins, and can be replaced. You can also get external battery packs for longer power. I also bought an extra long usb cable for like 3 quid and it will power from the lighter with a USB adapter, and you can even set the camera up to record automatically when it gets usb power, and re-record over the oldest clips, like on a CCTV system which makes it perfect for dash cam work. Plus its tiny, the size of a keyring, so hopefully not a target to thieves