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#94456 01/29/2006 9:42 PM | Joined: Jul 2005 Posts: 50 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2005 Posts: 50 | I just tested my 6-volt battery with a hydrometer. 2 of the cells are showing full charge. One cell shows 1/2 charge. Does this denote a bad cell or does it simply need more charge?
Thanks,
Mike
1951 Chevy 3100 w/235
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#94457 01/30/2006 4:06 PM | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Mike,
I think this usually means that cell is bad. If you have somehow to load test the battery you can watch this cell and it will bubble and off gas..proof it is going south.
If you charge the battery for the prescribed time and the cell is still low, it is probably bad. Usually a shorted cell won't allow the battery to take a charge. If it isn't a critical transportation issue, charge it and drive it...if it is going to croak, it will surely let you know.
The SG on a fully charges 6 volt should be 1.265. The allowable difference between cells is .050. 50% charge in SG (specific gravity) is 1.190. If you add 1.190 and .050 = 1.240, which is less than the 1.265 specific gravity.
This is classroom stuff...see if it works in the real world. Charge the battery again and drive the truck. Take jumper cables!
Stuart | | |
#94458 01/30/2006 5:44 PM | Joined: Jul 2005 Posts: 50 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2005 Posts: 50 | Thanks automarc! I have one of the "new fangled" hydrometers with the floating balls. I have not gotten the truck started yet. It is cranking slow after a full charge, and if I turn the interior light on, it dims while cranking.
Can NAPA load test a battery? I bought it from them last spring.
1951 Chevy 3100 w/235
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#94459 01/30/2006 5:52 PM | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | take it back to the seller - it's defective!
Bill | | |
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