The Battery Tender family of chargers is fully automatic - they will completely charge a battery, then automatically switch to a float/maintenance mode to maintain the life and health of the battery for as long as necessary. Battery Tenders are protected from short circuits and reversed polarity, so you can use them with confidence.

We carry the Battery Tender Plus, which includes temperature compensation to ensure optiumum charge voltage regardless of the ambient temperature. This is the one to use for winter storage of your bike. For lighter-duty use (for example, those lucky among you who have so many bikes that some don't get ridden very often), the Battery Tender Junior works great for 1/2 the cost. The International version has all the features of the Plus, and it will work on any household current in the world. Finally, if you need to protect a full stable of bikes, the 4-bank Battery Tender is basically four complete International Battery Tenders in a single housing!