You kinda lost me.
6X 12V in series will give a 72V system. You mentioned 6 batteries giving 24V....IE 6X 4 Volts. I fail to see the sense in that application be it a car, a truck, a tank or a jumbo jet. It's the 4 Volt battery that really intrigues me, why go that far off the beaten track, especially in a military vehicle. A 12V battery is commonplace and can be found virtually anywhere...Just what you need to keep your tank going in a tricky situation. A 4V battery is specialised and rare.
Ugh, abandon ship boys, we can't start her, we're all of 4 volts short and there's no 4 volters to be found. Dang! this 12 volter's waaay too big! (I jest obviously [img]smile.gif[/img] )
Pardon the pun but maybe we've got crossed wires.
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