Quote Originally Posted by Dr.Kamiya View Post
Wasn't thinking about a full dual 12V system like ones used for overlanding, just a small USB powerbank.



It'll be connected to ACC power so it won't be draining the main battery when the car is fully off.
The idea is just to have power to dashcams for extended recording when parked.
You can buy a sealed lead acid battery, I think it's about the one used for UPS. It's the size of a motorcycle battery.

If you checked the link I posted, that isolator will do the trick.