i just got me a cen-tech automatic battery float charger from harbor freight tools. they have a store here in east tennessee and online at Harbor Freight Tools . I got mine for $9.00 U.S. dollars. floating circuit maintains a full charge without overcharging. simple to use: just connect and plug in. Automatic safety shutoff. prevent battery self discharge while maintaining the life of 12 volt battery. provides 13.2 volts maximum output. avoid jump starts on seldom used batteries by keeping the battery fully charged....Automatic Battery Charger - 12V

 

Great price! Let us know if it works OK.

 

They work great. I have the same one from Harbor Freight at the same price. Go to their web site and get a 20% off coupon. Also look in the back of your bike magazine and look for the coupon there and while you are at it cut out the free gift. I got a LED flashlight free with mine using the 20% off. It came to $8.00 with the free flashlight.

I tend my deep cell battery that I use for my heat back-up (steam heat).

Edit: use code ' 20save '