Quote:
Originally Posted by Supervinnie40
However, I do have an aux socket in the boot that's directly connected to the car battery, without any circuitry in between (only a fuse). That should work in any case. But since it's in the boot I'd still need to get out of the car  . |
That would work fine, to keep a battery topped up in the boot, to a full charge. I have done that myself. The small size of the wiring and the resistance helps prevent large currents flowing back to the main battery, yet it will be big enough to allow the battery to be restored to a full charge. I would suggest adding an extra fuse, very close to the battery.