I like the Battery Minder line of products.  Whether you believe in the ability of desulfation to revive a battery, or just want to hang on to the concept that a charged battery wont sulfate enough to matter, this charger does what it does well.  It is only a 2A charger, and only charges with a temperature-compensated charge voltage and float voltage optimized for flooded lead-acid batteries.  There is a version for AGM if so inclined, that just has a slightly different charge voltage.  What I like about this charger is that it provides an indication of where it is in the charge process, and also if it is compensating up or down based upon temperature.  The charger always flashes the desulfation light, so it is claiming that it is always doing that, regardless of what charge stage the battery is in.The charger has a &#34;load&#34; light, which would indicate to you if you have a short in your car (or I suppose internal to the battery), so you can be forewarned.  I have not had to use that indicator, and hopefully it will not light up...The other interesting feature of this charger is that it provides a &#34;rest&#34; period on the battery every so often to see if it behaves abnormally.  If there is a short or the battery is starting to go bad, this test stage may be an indicator before you get a hard failure of the battery.For the most part, Id compare this unit to the far cheaper ($50ish) Battery Tender, made by a competing company.  I have both.  I like both.  I prefer the increased indication that is provided by the status lights on this one, and also like the fact that this one uses a multi-frequency desulfation process, which though I have not had to prove to work or not work, does in theory help reduce the formation and presence of sulfate crystals.  This unit can also run its temperature compensation to a remote location, which is good if the vehicle you are maintaining is outside of a garage.I do wish this product were around $30 cheaper to be competitive with the  battery tender which is also temperature-compensated.  This one is differentiated by its desulfation capability, but the much higher price causes it to be docked one star.