Without the right testing equipment it can be very difficult to test a battery.  The easiest method is to measure the specific gravity by using a hydrometer and to measure the voltage using a digital multimeter, if you test a lot of batteries you may need to buy a good load tester.

First you must fully charge the battery (see chart).  Check the battery voltage after removing any surface charge, it should read above 12.65 volts for a fully charged battery, if your battery is measuring 10.5 volts after charging it typically indicates a shorted or faulty cell.  If you can check every cell in the battery with a hydrometer, the cell readings should all be the same, a fully charged cell reads 1.265 – 1.280, if there is more than 0.05 points different it indicates a faulty battery.  Readings below 1.225 indicate the battery needs to be charged before load testing.

If the battery is sealed it should have a built in hydrometer telling the charge of one cell, you may get a good reading in that cell but the problem may be in one of the other cells.

Once the battery is charged you need to use a load tester.  A good load tester is very expensive so it may be better to get a professional to test it.

2017-01-17T10:23:27+00:00June 28th, 2013|

Call Us Now

Call:1300 769 282

To reach your closest R&J Batteries store.
error: Alert: Content is protected !!