Sometime you need the 8 amp chagrining Belfert and the 2 amp trickle on a minder or tender doesn't cut on a larger battery bank a Minder or tender will keep up on a single battery ? why pay 50 + bucks for a 2 amp mine have really worked good.
Gus I forgot the model number but they are in the tool dept at Lowes,Black and Decker also makes one but it is fairly larger than the DeWalt
I have three what appear to be almost identical chargers -- except for the name on them. When you plug them into the wall, they all charge at 6 amps but there's a button to switch to 8 amps; they all drop to a 2 amp trickle when a set voltage is reached. One is a "Stanley" BC6809, the other two have "Dewalt" on them. (And, oddly, the photos of the LCD readout screen on the Stanley don't match the actual graphics on Stanley charger but they do match the graphics on one of the Dewalt chargers but not the other although the Dewalt chargers appear identical in all other ways.) All this may mean nothing, or it may mean something; I don't know.
But they're *really useful* chargers, esp. for about $30!
BH NC USA