My Dewalt 20v 5ah battery was drain and wasn't put on the charger for a couple weeks then couple days ago I tried to recharge it and nothing, had one light on the battery but the charger wouldn't charge it. If anyone has bought replacement Dewalt batteries you know they can be pricey especially the 5ah ones. First thing I did was look up Dewalts warranty on batteries, since that wasn't encouraging even though mine was just under a year old, so I went to the next best place, youtube, watched a couple videos and a fix so easy thought I'd share it just incase someone on here doesn't know.
Get a couple small pieces of wire, preferably different colors, find the +&- on both batteries. Now on the good battery hook one wire to the (+ plus) and the other wire to the (- negative), then hook the other ends of the wires to the dead battery and keep the + with the + and - with the - BUT no more than a couple seconds, then take the dead battery and place it on the charger and the charger should charge it, it did on mine.
Get a couple small pieces of wire, preferably different colors, find the +&- on both batteries. Now on the good battery hook one wire to the (+ plus) and the other wire to the (- negative), then hook the other ends of the wires to the dead battery and keep the + with the + and - with the - BUT no more than a couple seconds, then take the dead battery and place it on the charger and the charger should charge it, it did on mine.
