I admit it......I'm not so good with all things electric. The only "D" I received in an institute of higher learning was the course> DC fundamentals. I have progressed however and can figure out why my tailights on my trailer aren't working but I digress.......

I picked up a new finder........one of these,   (You need to Login or Register

I also picked up a very small 12 volt battery to power it. One of these   (You need to Login or Register

240 cold cranking amps (whatever that means?).
At 24 lbs and only one portage I thought why not? Plus a little weight in the boat is probably a good thing.

I have never used a powerful depth finder always opting for cheapies  and I have never tried running one for 10 days> 10 or 12 hours per day without being able to recharge the battery. Think it will power the unit for 10 days?