How to Test a Laptop Battery
Testing a laptop battery allows you to determine if it has any remaining charge. The best way to test a battery is to connect it to a laptop and turn the unit on. However, there are several other ways to determine if your laptop battery has any charge.
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Instructions
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1
Test your laptop battery with a test light. Check the test light first to make sure it works. Connect the light to a metal ground source. Check the test light on a battery that you know works. If the test light glows, it's good. Place the light's test end into the battery's positive port. If the light glows, your battery is good.
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2
Check your laptop battery with a battery tester. Put one end of the tester in the battery's positive port, and the other in a negative port. The tester will read how much life is in the battery, if any.
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3
Hook your laptop battery up to a multimeter. Follow the process in Step 2 to connect the meter and determine how much charge is left in the battery. Most multimeters are electronic, but some have gauges that move to a certain point.
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4
Place the laptop battery on a battery charger. These are mostly used for cars. Battery chargers generally indicate if a battery is good, bad or needs a charge.
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