I have several of the 3 amp versions of this charger/maintainer, and wanted another with a little more oomph. This is a great product to charge and maintain batteries in equipment that is not regularly used.
Had it on for over 16 hours said evaluating then charging then stayed there. May have worked on a smaller battery
It is a fine small charger
Got it at a great price, and I like that it automatically analysis the battery and determines if it's a 6 or 12 volt, and then if it needs charging, maintaining or if its bad.