Re: Ignition System Problems

Posted by Owen_Dyneto On 2014/4/16 11:58:20

...and the cell specific gravity test will show an undercharged condition. Am I correct?

It will show the fullness or completeness of charge in each cell individually, and thus will also show a weak or failing cell. For example, if one cell shows a specific gravity less than the others and it (the specific gravity) does not increase with continued charging, the cell is failing. Likewise the failure of all cells to reach a full-charge specific gravity with continued charging indicates a failed battery.

Some guidelines, measurements at room temperature:

1.275 or higher - fully charged
1.250 - 1.225 - marginal, needs charging or battery failing
1.210 or less - battery "dead" and may or may not respond to charging. If the gravity fails to rise with continued charging the cell has failed.