The issue is that the batteries suffer from Cadmium Dendrites and not that the chargers are bad. The problem is that those chargers aren't very good and maintaining a steady voltage or reconditioning the batteries. The issues is here is that the 15.6v is stuck in between two charger models that don't support it, and you could have bought after market. You could zap your batteries and clear the memory, but you have to be careful. If anyone knows of a charger for the 15.6v that could recondition the batteries, please forward. Thanks