17 volts
Is anyone running the Dewalt 20v battery system on Lowrance unit?
17 volts
12V Gel Cells are available at the Big Box Home Improvement stores, or online. I run an older FF/DF off a 12V 7.0 AH (amp hour) gel cell and it works for a whole day of being on the lake. I charge it with a 2A trickle charger. These batteries can be mounted in any position.
Here is just one, from Home Depot. They have one that puts out 20AH for about $45.
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Clint
Far West Kentucky
Old enough to know better and way too old to care!