You know them power jumper packs. They are a little lighter than a battery. The one I have has a handle, light, compresser, jumpers, and a power outlet (cigarette lighter). That would be what I would take. They really hold charge well, I can run my little TV, watching football when Im duck hunting for Hours a day and for days on end. Just a thought, for ya. They aren't as light as a 12 V drill battery, but maybe a compromise to the short charge.
I use a small gel cell 12 volt battery.
$20.00 at Sportsman's Warehouse.
These batteries are great for fish finders and recharge easily with a cheep low amp charger which you can also get at Sportsman's.
They are very light and will last all day before needing a recharge.
One tip though, keep the battery warm before using it for the best results.
Also keep the finder warm. Use the light on the finder to keep the face warm.
I will place a chemiacl hand warmer on the gel cell batery if the temps are really cold.
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