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That is a great idea I'm sure it will work fine for lighting. The problem is, the battery is only 1.25ah vs the 7-9ah for sla flasher batteries. It would only run a digital fish finder for about 2 hours. For reference, with one 18 inch LED strip you should get about 12 hours of run time on a full charge.
As a side note, I bought a Shorai battery this year, normally used for starting motorcycles or ATVs. It's lithium ion and incredibly light weight. It was rated at 18AH, so double the normal flasher battery. I have had one in my Vex all year and so far it has worked great. The batteries are expensive and the guy from Shorai wanted to make it clear they are only designed for starting applications. We'll see how it goes.
i just looked at that battery you mentioned today ( http://www.shoraipower.com/Products/batteries/LFX07L2-BS12.html ) and it looks great! LFX07L2-BS12 is the cheapest at $90.00 @ amazon and only .75lbs. i have one of the best chargers for it and might grab one to replace my heavy sealed lead acid battery.did you try yours out yet?i have not been on ice since before this post started to try out the rigid brand 12v battery, but i am positive it will do some good for me. seeing all the other folks chime in about their experience doing the same is good to see and assures what i what saying.thanks for all the tips!
I think some read your post just wondering why it would be a good idea to use them? I can understand under a pinch but to always use them seems to be kind of a waist of a good tool battery. You only get so many charges out of them and to me I would rather save mine for my drills. Im not busting your chops just asking. I know I just bought two for my drill and they were 100 bucks. Free forever???
Did you know using the battery on any tool or any application other than in a rigid drill voids the warranty?
fishinnutyou might want to look into the 14500's they will fit same as double A. you would only need 3 of them and a good portable charger. you can charge from 12v dc automotive or 120v ac. if you want to know what is good, let me know. you won't be throwing your money out so fast on disposable batteries. these charge for 400 charges. so whats 400 AA batteries cost?just be sure to buy the protected type.