Battery Ah Rating Calculator. To determine the ah rating of a 12 volt battery use a multi meter. Call or text us. The ah rating is normally marked on the battery.
If not you can calculate it as volts x amp hours ah. Address 1985 friendship dr.
Connect a basic resistor across the battery s terminals then monitor the discharge over time until the voltage decreases to 12 volts.
An amp hour ah is the amount of current a certain battery can supply for a certain period of time. The higher the cca rating the more the amp value of a battery. This 740 cca or 102 ah battery will run 12 75 hours when running at 8 amps of voltage or 10 2 hours at 10 amps of voltage. This is usually stated on the battery itself see image 1.
