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| battery questions for sl6 electrical sages https://www.slantsix.org/forum/viewtopic.php?t=24078 |
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| Author: | userhelp [ Mon Jul 16, 2007 2:27 pm ] |
| Post subject: | battery questions for sl6 electrical sages |
hello sl6 sages- must be a battery guru among us. got my 80 volare wagon shipped to fla and am working over different systems. battery looks less than a year old. a 72 month exide. was dead, discharged. wouldnt even light headlights let alone start engine. disconnected and cleaned terminals and posts. slow charged it over night . tester said it had 10 volts. wouldnt accept charge. will sitting for a while 2 mos lets say finish the battery? anything tothe old tale about a battery sitting on concrete floor killing it? thanks bob fisher |
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| Author: | sharp21 [ Mon Jul 16, 2007 2:37 pm ] |
| Post subject: | |
Im no guru, but recently had similiar battery problems... My alternator crapped out, so my battery discharged all the way. Wouldnt hold a charge after that. Long story short, new battery got me back on the road. S> |
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| Author: | Joshie225 [ Mon Jul 16, 2007 2:43 pm ] |
| Post subject: | |
Sounds like the battery may have a bad (shorted cell). Yes, leaving a battery discharged will kill it, but I can't give you a time frame on how long it takes for the battery to die. Don't assume the battery is only a year old. There should be a sticker with the month and year of manufacture. It's frequently a single letter for the month A being January, B February and a single digit for the year. C5 would be Jan '05 or Jan 1995. A battery sitting on a concrete floor doesn't hurt the battery. Dirt and moisture on the top of the battery can make for a conductive path that will discharge the battery. Lead-antimony batteries also self-discharge at a fairly high rate which goes up with temperature. On the other end of the scale a discharged battery can freeze and mechanically damage the battery. I hope this answers your questions! |
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| Author: | KBB_of_TMC [ Wed Jul 18, 2007 9:36 am ] |
| Post subject: | |
I used to have my seldom-used batteries die every year or two; now I use an inexpensive maintainence charger from Harbor Freight (~$14, <<1A, rectified AC regulated @ 14.4V) most of the time. I got nearly 10 years out of my last Sears Diehard (maybe Silver?) group 27 that way; it may have lasted longer, but my Plymouth's voltage regulator failed and way overcharged the battery on the way back from a show. The old battery still worked OK until I added water to make up for what was lost while overcharging; then it shorted a cell. I also tried the de-sulfination pulse modes in my fancy Vector charger on my old batteries, but couldn't ever see any improvement. |
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