Has anyone tried one of these? Wal-mart has the 1086 model reduced to clear right now for $15.My old battery charger died so I picked one up,it only weighs a couple of lbs and it isn't much bigger than a carton of cigarettes but it seems to work fine. http://www.shop.com/op/~Vector_2_4_6_AMP_12V_Battery_Charger-prod-23976313