Re: Battery

You may have a battery that was over discharged.

Sometimes this happens with a good battery when it was sitting at the vendor for too long. The battery self discharges lower than the minimum voltage the charger will deal with, and it refuses to recharge the battery as it ( rightly ) thinks it is bad.

I've resuscitated a couple of batteries that were borderline by using my ICE charger, to bring them back up.

Knock on wood, they have held up OK, though this is not advisable.

Re: Transformers

Most "wall wart" transformers cannot output enough current for your charger.

As stated make SURE that the supply you use well exceeds the total draw from the charger.