Quote:
Originally Posted by BossCat_Works
yeah you really need a leisure battery, you can get away with charging a couple of 7.2v packs but otherwise be ready to bump start your car seen it happen many a time
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Indeed... And remember that LeadAcid=realCar car batteries suffer when going flat. They are not designed for that.
Alternative is
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1) to get 2 or 3 old car batteries in your boot & charge off that. 1 fully charged real car battery is roughly 50AmpHour, so you should be able to do 10 Lipo charges with it before you reach the bottom 30% of the LeadAcid. (1 lipo charge=5Ah at 8V, so with modern chargers ~3Ah off the 12V LeadAcid battery).
2) charge off the cigarette lighter but do run the engine every so often to keep you car battery charged