The deer feeder batteries last a long time. I use them on both of my ff's and mabey charge them once a month.

I've got a Cabela's 12v feeder battery. It works great. It'll last two trips if I leave my brightness setting on high on my graph.

you should get this battery! will last you all day!

Cabela's


if you're cheap, you can also go with this. its a cabela's brand and they back up their stuff even if the warranty expired.

cheap battery for cheap people

You can get them at surplus electronics stores like Tanner Electronics at 1100 Valwood Pkwy Carrollton. For anywhere between $8 and $20 depending on size.

I've also salvaged some from old house alarm systems and converter boxes used by Time Warner, Verizon, etc. They usually leave those behind and there is a backup battery inside.

If you haven't picked up a battery charger I've been using the one below.

http://www.walmart.com/ip/Battery-Tender...720&veh=cse

Get your charger here way Cheaper!
http://www.harborfreight.com/battery-float-charger-automatic-69594.html

I bought one of these and stole the battery from it! Its lithium and lasts for ever and weighs almost nothing!

http://www.harborfreight.com/12-volt-cordless-38-pro-lithium-ion-drilldriver-69360.html

That seems clever but how long does it last? I wouldn't think it'd have much battery life...

I went with this. Thanks Lee. See you Saturday.

The extra batteries are cheap! 19.99!!! and lithium last a long time most fish finders dont draw that many amps! and way better than those heavy lead acids!
http://www.harborfreight.com/12-volt-lithium-ion-replacement-battery-68059.html

How long will it push a 360GPH Rule? Mine does for 8 HRS! weighs in at a mere 13 LBS! $80 bucks.Its a Werker wheelchair battery.Deep cycle.Overnight charge or if setting leave trickle charger on it!I dont think you can beat it. Now if I could just modify the tank on my kayak Im almost there! Its a little more tricky than I first thought.Profile catches wind,water sloshes to one side or the other.Modifications made and 2nd attempt comming soon.

how many amp hours is the wheel chair battery? got a link?

2.5 Amp hour.

How do you guys that do a thru-hull transducer install keep your battery from bouncing around and knocking it loose? I got the battery/box/charger combo that awdieeeee suggested. It's not a waterproof bag, which I feel like would have a little traction and not slide so easily, but it's a metal box. I feel like it's gonna slide around with every paddlestroke. Any suggestions? Maybe like some adhesive velcro to keep it secured?