How To Tell If My Ryobi Charger Is Working. If the battery charger is providing proper voltage 142 or more then the charger is likely okay and the battery is likely faulty. In order to verify if the charger or battery is faulty a voltage meter will be needed to check the battery voltage and the output voltage of the charger.

Connect you charger to the power outlet. Thank you for your question and I understand your concern. Answering my own question I opened charger found a slow-blow fuse that had failed.
An automotive or car battery charger rarely goes wrong.
If the charger is showing both a Red flashing LED and a Green flashing LED at the same time then there may be a fault with either the. If you are trying to charge your Ryobi li-ion battery and its temperature is below or above this range it will not work. Just before the redgreen lights start flashing remove the battery from the charger. Do battery chargers stop working.

