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It should work, but make sure you have enough cranking capacity on the cap bank to not drop more than about 3 volts or so; this way you don't drain the caps further than the battery voltage, and wind up killing the battery anyways due to the still relatively large hit it will take.
Ideally, you'd want the caps isolated from the battery with some kind of charge controller to prevent overworking the battery (since the caps act like a dead short).
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