How To Know If A Battery Is Good Or Bad. Place the black lead on the negative terminal. Gases form bulging the battery from the inside and reducing its capacity to hold a charge.
Additionally if you want to know some more about how to test your laptop batterys lifespan wed be happy to talk to you about it. If you know the battery is good because it has been replaced recently and its dead in the morning there is an electrical draw causing this problem. A dead battery will bounce several times and fall over while a good one will drop and fall over without bouncing at all.
One of the simplest things you can do with a multimeter set to VDC is measure the voltage across the terminals if for instance the battery is a 12v battery if it was below 96v it would be considered bad.
You know what that means. If you know the battery is good because it has been replaced recently and its dead in the morning there is an electrical draw causing this problem. If your car wont start its often due to a malfunction of either the battery or the alternator. This causes a reaction with the other.
