| [GMCnet] Engine batt comes back alive! [message #312540] |
Thu, 26 January 2017 19:27  |
Mike Kilroy
Messages: 80
Registered: July 2006
Location: Farmersville, OH (near D...
Karma: 0
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So yandini triple output charger/inverter dies in cold of December... I did not catch it for 1 week. By then both batts were down to 9vdc...
Buy replacement in late dec 2016, put it in. both batts come up to 13v; but engine batt dies when trying to crank. Guess it died in that week of being down.
Decide to buy combiner too. Stuck it on 2 weeks ago finally. engine batt still won't crank engine over (boost sw gets it cranking fine).
So figured I would buy an engine batt eventually... went out today and cranked - WTH?? engine batt is like new again???
Moral of the story is a short in a battery may clear in time?? Never saw this before in 40 yrs!!
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Mike (AC8V) & Vickie Kilroy
'73 Canyon Land 26' sidebath
455/ceramic filled crossovers
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| Re: [GMCnet] Engine batt comes back alive! [message #312543 is a reply to message #312540] |
Thu, 26 January 2017 20:42  |
Jim Miller
Messages: 501
Registered: March 2008
Karma: 10
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On Jan 26, 2017, at 8:27 PM, Mike Kilroy wrote:
> Moral of the story is a short in a battery may clear in time?? Never saw this before in 40 yrs!!
Hi Mike,
This is not completely unheard of although sometimes it may take many years and is undoubtably dependent on battery chemistry and other environmental factors. As an interesting aside there are several examples of orbiting satellites which had been dead for decades that came back to life after their previously failed (shorted) battery banks eventually cleared their short circuit and went open-circuit and then allowed the vehicle’s solar arrays to once again power some of the vehicle's payloads for momentary amounts of time. The situation was generally confirmed when it was observed that when the satellite came in view of the sun - and with the proper orientation of the vehicle to the sun - that they began transmitting telemetry and then when they went into eclipse they went silent.
—Jim
Jim Miller
1977 Eleganza
1977 Royale
Hamilton, OH
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Jim Miller
1977 Eleganza II
1977 Royale
Hamilton, OH
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| Re: [GMCnet] Engine batt comes back alive! [message #312548 is a reply to message #312540] |
Fri, 27 January 2017 08:49 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Considering you can get a new premium grade Group 78 battery on sale for $96 and $10 minimum for the old one, not worth keeping it. This type of battery has been the death of many alternators or isolators. This will let you down at the worst possible time and could be dangerous. Once drained flat they are on borrowed time. Farm and Fleet has Platinums on sale now and last week the Golds were on sale for about $10 less.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Engine batt comes back alive! [message #312553 is a reply to message #312540] |
Fri, 27 January 2017 19:27 |
SpookyEng
Messages: 208
Registered: June 2016
Location: Navarre, FL
Karma: -5
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Senior Member |
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What JohnL said. Batteries are relatively cheap and I hate having preventable issues. At the first sign of weakness out they go, cheap insurance.
JD Lisenby- USAF Ret
1978 Royale-455
MacDash, Manny Tranny, FI-tech, 3.70 etc etc
Navarre, FL
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