mangoland
Member
Here is a simple electronics project that I use to keep my various batteries from getting sulfated over the course of a winter. Works better than a trickle charger alone. Many people have been successful with it. Note: this is not a commercial link, and I make no $$ from it. Just a homebrewer sharing.
http://www.shaka.com/~kalepa/desulf.htm
http://www.shaka.com/~kalepa/desulf.htm