How Do You Know If A Rechargeable Battery Is Bad. There will be a negative- and positive-side connector on the battery. Not only is it compatible.
If it still has the same charge as before it was initially used then your rechargeable battery still holds a charge. A few quick steps will tell you if your battery charger is good or if you have a bad battery. If not it needs to be replaced because the energy output is inconsistent and eventually the battery will stop working.
To do this quick test you will need your Dewalt battery charger.
Next take the red lead of the voltmeter and place it on the positive terminal. A standard rechargeable AA battery comes with 15 cell voltage capacity. It depends on the chemistry of the battery you are checking. I have 17 old AA rechargeable batteries and would like to figure out the fastest way to know which AA batteries are at the end of their recharging life.
