Got tired of my go-pro clone cameras batteries, either dying within 45 minutes-ish..and then they just became DEAD- unuseable.
Found out a few companies make USB plugs, that connect to your battery. ( charging cel phones what not) i purchased two, of the USB ports, then drilled and cut into the watertight housings, so the cameras power supply can fit. Then, I changed setting on the camera to " auto" this means when its connected to direct power , it starts recording on its own.
So I have 1 camera low on the windscreen, and the other camera on my helmet. ( this does mean i am now attatched to the bike via a cord to helmet, but thats fine, ive made areas for some slack/movement, without dangly cords everywhere). As soon as Im ready to ride, i connect both USB to camera cords, start recording, and ready to go!
This way im only limited to the size of memory card, and not changing out batteries, or having a bulk supply of them. The ONLY downside ( to me) is that I MUST remember to disconnect the USB cords, or I'll be recording all night/drain battery. So far, no issues.