12 volt engine starter to power a lipo charger

[shaunjohnson]

like EVERYONE at the local track uses them to charge stuff.

but here's a tip..
go to the local tip (called the dump over there?) and find the used battery pile.
pick out all the blue batts, the marine ones because they are changed out anualy.
now take out your multimeter and look for anything above 12.6v
if you find one showing that or above that value, either "liberate" it or give the tip guys a few $$ to take it off their hands.
and wu-la, new field battery.

we did this and now have 2 marine grade starting batteries to power field equiptment, they also come in handy to start ye' ol' tractor from time to time. (cant beat 500 CCA)