Eisboch wrote:

I'd recommend a float type battery maintainer rather than a trickle charger.
The old trickle chargers can still overcharge or boil off a battery over a
long period.

The newer, "smart" battery maintainers keep the float charge voltage below
14.4 volts.
I use them for my motorcycle batteries during winter storage. The work
great and are not expensive. Plug 'em in and forget them until spring.

http://www.boatandrvaccessories.com/VEC-080.htm

Eisboch




I've got a larger "VEC" "marine" battery charger. I just hook it up once
a month on the boat batteries. I'm just not used to leaving a battery
charger hooked up all the time.