I'm currently running my fish finder on an 8-pack of AA batteries. It usually lasts about three trips before I have to swap them out, but I'm getting sick of keeping Duracell in business. I just went on Amazon and searched 12v rechargeable battery and got a ton of results.
The interesting thing is that in the same or similar form factor, the mAH ratings for the batteries are much lower than what 8 heavy duty AA's will rate. We're talking about 4800 for the
rechargeable, and close to 10K for the alkaline non-rechargeables. I need something that will guaranteed last at least one long day on the water. I don't particularly want to buy one of the larger batteries, as my Hammerhead attractant (read: bait tube) doesn't need any juice. You guys got any advice on buying a smaller rechargeable battery for the kayak?