You can test a battery by using multimeter. Set the multimeter to the DC voltmeter setting and then place the leads of the multimeter across the leads of the battery. the multimeter will have a readout of the voltage.
a test battery is what you need to work out your capasity analysis after.
Take the battery out and test it with a multimeter.
to see how strong your battery is
You can take it to a battery place and they can test it under a load.
You can test your battery with a battery tester. If you don't have a battery tester, you could take the battery to Advance Auto Parts and they will test it for you for free.
A battery test is a compilation of several individual construct measures into one survey instrument.
13 test batteries
Battery load test
A battery charger can be used to test a battery if the charger includes a voltmeter, so you can read off the voltage. Note: A battery charger is designed to be used only for rechargeable batteries. It can be very dangerous to try to use a battery charger to test or recharge normal non-rechargeable batteries.
give me kinds of battery...
Battery capacity tester
Have a shop load test the battery.