How To Check If A Battery Is Charged. How to use a multimeter to test a car battery. Use a battery tester to see if the rechargeable battery is still in a good shape.

But when it reads 124 volts the battery has attained a 75 charge level and it could still be charged. If the battery is charged it should make a solid thud and most likely stay standing. First you can easily check on your batterys current charge.
Get A Battery Tester.
Both of these types of batteries can be easily tested for a full charge. This indicates the charge of your battery. Should you see a reading of at least 126 volts then your battery is fully charged. The open top or maintainable battery allows the user to check and add fluid to the battery.

