I use a little 14ah deep discharge battery from an electric golf cart. If you work it out on watt-hours, 14ah 12v is 168wh. A 5000mah lipo is 37wh. Round that up to 40wh for nominal voltage. You can charge a 5000, from flat 4 times. And realistically, you would just be topping off, and hopefully arriving with at least one set of batteries fully charged.
In a full day's racing i use about a third of it's capacity.
Oh and they cost about £15-20.
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TLR 22
B44.2
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