o the last battery and no problems since.It was a blame game between the 2 for about 2 years.If it is not clear to Bob I suggest he call Iota the manufacture that made the charger this is not your Dads charger made in the 50s and 60s.Solar chargers will do a number on the first battery in a bank if hooked up to one everyone does it their way have a great dayI am not doubting you, just trying to un