You could use anything that will provide ~12v DC power, whether it be a inverter/converter or a deer feeder battery. Some HU will handle up to 18v, kayak guys sometimes use the battery from a cordless drill
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I meant to behave but there were way too many other options available at the time. 
2014 Alumacraft Classic 165 cs
2014 Merc 60 4s
55# Terrova/IP
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