Battery size for fish finder, GPS, stereo, and nav lights

[Beercap]

How many CCA would a battery need if its only being used to power the boats fish finder, GPS, stereo, live well, and nav lights if its hooked up to a 6 amp alternator (my Honda BF-15 has a small generator)?

I plan on using a MASSIVE 850 CCA battery up front for my trolling motor and recharging that one at home.

 

[TNtroller]

I would try a $25 lawn mower battery, not too heavy and would power the items you listed w/o issue.

 

[thatkidhugo]

TNtroller has it.

I picked up a lawnmower battery from walmart and hooked up my garmin echo500 and my bilge pump and I have no problems making it last a full weekend of fishing.

Edit: The plus side is they are cheap, if you have no replace it- no biggy.