Perform a Charge Testįirst, you need to determine the time it takes to charge your battery, this information you will get from the manufacturers’ guide. Here you will learn how to tell if your battery is going bad by using the simple means below. When your Dewalt battery goes bad it will say fully charged but not work. Handling a Dewalt battery, like other batteries, is hazardous. Checking if Your Dewalt Battery Has Gone Bad
