Extra Batteries--Golf Cart?

[halyardz]

A number of discussions about the main banks but I''m looking for a short term backup or alternative for lighting. Should one just carry a spare 12v deep cycle or go to the golf cart battery option?

[Larrys Pal]

Remember it takes two golf cart batteries (6 volt each) hooked together to make 12 volt. Space maybe a problem.

[Pangaea]

halyardz,
There is alot to be considered in choosing batterys for a boat. But in a nuttshell:
If your boat is smal,20 to 26 feet, and all you want to do is run interior lights, a grp 27 will most likly be all you need. Remember, try not to run your batterys down more than half way between charges and then don''t let them stay down, recharge imediatly or as soon as possible. If you are constantly running them down bellow 50% between charges, then your battery bank is to small.
Hope this helps.

Dennis

[halyardz]

Thanks LP and Pangaea. I do have a separate starter and deep cycle for the house. Just looking for the best alternative for a separate battery to be recharged when on shore power. I''ve got plenty of space for the install. Sounds like just another deep cycle would do the trick.