What amperage should be drawn for a battery load test?
What amperage should be drawn for a battery load test?
Examine the battery label to determine its ampere rating. You will see “CCA” followed by a number that denotes the cold cranking amps. Divide this number by two on your calculator to arrive at the optimum figure for your load test. For example, if the battery label reads CCA 500, then divide 500 by 2 to get 250.
Are car battery load testers accurate?
Most electronic battery testers are able to provide an accurate assessment of battery condition/capacity even when a battery is “dead”, or significantly discharged. This is a critical benefit, saving significant time for busy shops.
Can you load test a deep cycle battery?
Batteries must be at 100% voltage before a load test can be applied. When load testing remove all battery cables from their terminals. Using a load tester, apply a 15-second load equivalent to 50% of the battery’s CCA rating. Refer to the load testers minimum passing voltage to determine the battery condition.
What should a 12 volt battery read when fully charged?
about 12.6 to 12.8 volts
A fully charged battery will typically display a voltmeter reading of about 12.6 to 12.8 volts. If your voltmeter is showing a voltage anywhere between 12.4 and 12.8, that means your battery is in good shape. Any voltage above 12.9 volts is a good indicator that your battery has excessive voltage.
Can a battery show 12v and still be bad?
Cannot reach higher than 10.5 volts when being charged, then the battery has a dead cell. Fully charged (according to the battery charger) but the voltage is 12.4 or less, the battery is sulfated….2) Take a Voltage Reading.
| State of Charge | Voltage |
|---|---|
| Discharged | 0 – 11.9 |
How much of a load is placed on a battery that has a 500 CCA rating?
This number is usually half of the CCA rating. For instance, a 500 CCA battery would load test at 250 amps for 15 seconds.