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Question if anyone knows, my cigarette lighter stays on when the ignition is off. This has been causing me problems with the battery dying. But if I plug this battery into the cigarette lighter, will it work without a relay or will I have to wire one in? In which case, I'd just hardwire the whole thing.
If you plug the battery pack into your always-on cigarette lighter, the car battery will still end up being drained because the battery pack will assume your car is still on and keep charging itself.