Originally Posted by Desert Panther

I'd leave it on the desulfating charger for at least a month, you may be pleasantly surprised at the end result. My desulfator has saved about 50% of the batteries i've hooked it to, not a bad success rate in my opinion. Mine took about 3 months to revive a battery that had been sitting in my buddies shop for a while, then sat in mine. Currently alive and well and powering my Cummins Dodge truck now.