1K for a 12V Tm is HIGH to me. I would get the cheapest bowmounted model in 12V, should run less than $500 and go with a FishFinder 320 on sale at academy for $120 last time I checked. This will be all you need. I had the yellow top batteries but for less than $100 Interstate has a GIANT DEEP CYCLE ACID battery that is truly one of the best batteries I have had.
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