Fish finder battery

[dubob]

Does anyone know if I would be able to use this for my humminbird helix 5 ice fish finder have a couple of batteries for it but want to cut down on weight 

Helix draws about 615 ma.  That battery weighs just over 4 lbs and will get you about 32 hours of continuous operation with your Helix ($ ???).

A 12 vdc, 10 ah lithium battery weighs about 2.5 lbs and will get you about 16 hours of continuous operation with your Helix ($35 to $40).  A 12 vdc, 7 ah is ≅ 2 lbs and ≅ 11 hrs. ($25 to $30).  Personally, I'd go with the 7 ah one.  I don't overnight ice camp/fish and would get about 2 days of operation out of it.  Decisions, decisions, decisions!