Few points here, the Tekin tray won't take the pack down to "0" I don't know who started this rumor but it doesn't,it takes the pack down to .07(voltage needed to maintain lights) (lights are out) then down to .05 and shuts off.As far as the 5 amp discharge,a low currrent discharge is what you want for EQ'ing,which is why the Tekin is a 2 amp discharge.Remember HEAT is the enemy.I wouldn't even call this a discharger, it's a EQ'er and from the looks of it a pretty nice one it's really what I think you would want,especially with the volt meter on each cell, that's really trick,I would consider this device if I hadn't just purchased a Tekin tray,and from the sounds of it it doesn't work on 4 cells.