Battery Tender Junior 12V Battery Charger and Maintainer: 800mA 12 Volt Battery Charger for Lead Acid and Lithium Batteries - Switchable Battery...

The Battery Tender Junior 12V 800 Selectable Charger is much more than a trickle charger. It has a brain. Its lightweight, compact, and very easy to use, especially in small spaces. With selectable battery type, it will keep your battery fully charged so that it is ready to go when you are!