Underwater camera electrical question
Just bought a Cabela's underwater camera (the cheap one). It comes with a 12 volt battery, but no way to charge it except a plug in charger(110volt). I'd really like to not have to charge this thing when I'm in a remote location in Canada. If I wire it so I'm hooked up to the starter battery in parallel, can I run the camera and charge the small battery at the same time? I was thinking that I would just add a cigarette plug-in and use that to run the camera and charge the small battery. This way, the small battery would always stay topped off and not just waste away. I guess potentially, it could also add juice back into the system - maybe that would be a problem.
Thanks for any help.