The Battery Buddy Battery Charger is the smartest little trickle charger around. It knows your battery has needs. Battery Buddy gets that and delivers the goods. Its built-in battery brain controls a precise 4-step power program (initialization, bulk charge, absorption, and float modes). Just connect the charger and come back when you're ready to use the battery. While you're away the Battery Buddy will be carefully calibrating its output to your battery, maintaining a full charge without overcharging the battery. If your battery slips below a full charge, Battery Buddy resumes a normal charging cycle. Battery Buddy works for batteries in cars, boats, ATVs, UTVs, PWCs, RVs, motorcycles and any other vehicle in long-term off-season storage in extreme heat or cold.