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Old 05-08-2013, 08:14 AM   #1
Phat Phrog Stunt Team
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Location: Iowa
Posts: 34,205
My long time friend sent me this yesterday.*
He forgot to pull battery last fall and does not have a battery disconnect.
He retrieved the camper "flagstaff 5er" Sunday and immediately plugged it in .Yesterday he called and said his dw heard a loud boom.

He's installing a new battery box, battery and battery cut off switch this morning.

Battery most likely ran dead several weeks after storage then froze this winter.


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Old 05-08-2013, 08:20 AM   #2
Site Team - Lou
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A repeat of a hit!

Identical scenario.
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Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
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Old 05-08-2013, 08:25 AM   #3
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Good reminder of what can happen. Good thing no one was hurt.
Pull-Rite 16K Super 5th
2014 Rockwood Signature Ultra-Lite 8289WS
2011 Chevy 2500HD - DuraMax (Just over 5000 miles now!)
Nights camped in 2014 - 21
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Old 05-08-2013, 08:36 AM   #4
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Oh woow, I was lucky then ! My battery was dead over the winter too , and I took it home, put it into the garage and charged it. Yikes ! Lesson learned !
2009 Ford F-150 XLT/XTR 5.4l, CrewCab. long bed
2011 Surveyor SV-291
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Old 05-08-2013, 09:18 AM   #5
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Location: Eastern PA
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I'm guessing battery froze, cracked, and leaked some.
The left over electrolyte off-gassed enough to make a dangerous fuel-air mixture, and it finally found an ignition source.

Or can a battery contain the gasses to a point that they actually over-inflate the box?

Either way, I believe this means there is also a lot of acid suddenly spread over a large area, so this is really a dangerous situation.

Lesson - check your levels before charging.
2011 PrimeTime Tracer 2600rls
2001 GMC Yukon XL 2500, 6.0L 4.10:1 axle ratio
Nights camping 2014 - 17
2013 - 15
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Old 05-08-2013, 09:49 AM   #6
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I bring my batteries inside for the winter and trickle charge until topped off a few times over the time they spend indoors.
2013 Wildcat 323QB
08 Silverado Crew Cab 2500HD Duramax-Allison
Twin Honda 2000 campsite friendly generators
Nights camped in 2014 = 19
(2013 = 36)
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Old 05-08-2013, 10:10 AM   #7
Denver, CO
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Once a battery is left dead it will not likely be of much use anyway, so just change it out and treat the new one better. It's not worth trying to charge, and risking a short and BOOM.
2007 Chevy 2500HD Classic LBZ Duramax/Allison (Stock)
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Old 05-08-2013, 10:19 AM   #8
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Most likely cause was low electrolite due to frozen cracked cell.
IF you have a low/dead battery be SURE and wear safety glasses or goggles
and check to see electrolite is over top of plates in every cell before attempting
to charge it.
If you find one cell dry, it's probably cracked!

Dan & Rita D
2004 5.3L Silverado 1500 ext. cab 2WD
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