I have a riding lawnmower, a battery start gas powered pressure washer and 2 motorcycles. At least one of batteries is dead when ever I try starting it... That's a thing of the past, this charger tells me the condition of the batteries but also helps repair them if they become sulfated. Then I have the option to perform a fast or trickle charge, depending on whether or not I'm going to use that day or just doing a monthly maintenance charge. I used to have a much smaller charger/maintainer but it would take the entire day to charge one of the batteries unless it was constantly on all the time which would have required me to have 4 of them. So this is by far a much better value too.