(Note: 36V is battery's voltage. NOT charger's voltage. Please Check For Compatibility With Your Unit. Thanks.)
Note: Rechargeable batteries typically last 1 to 3 years. If a battery is old or depleted, it may not accept a charge, but this is not necessarily due to the charger. If you're unsure whether the battery or charger is faulty, use a voltmeter to check the charger's functionality.