Battery Tender® Power Tender Selectable 6V/12V @ 4A
The Battery Tender 4 Amp Power Tender Selectable 12 or 6 volt options as well as battery type selection has you covered. It's lightweight, compact, and fully automatic; very easy to use, especially in small spaces. It will keep your battery fully charged so that it is ready to go when you are!
It works perfect. It's a good addition to my garage for long winter storage of my hobby car