Batteries...I know a dead battery (or low on juice) will freeze in cold weather.What about a fully charged battery, with temps not going below 15 degrees? (In-law 300 hundred miles away. He calls me and is getting his RV ready for summer. His battery is dead and he keeps his RV plugged in 24/7 He thinks battery froze last winter and I don't think a health battery will freeze and he has other problems). Battery is hooked up to another charged right now, to test further.Thanks

A fully charged lead acid battery will not freeze until the temp is below -90F.

OP here....HOLD your answers folks. And Yes, Thanks for answer. I know now and I hope I never see -90.Brother in law called me back. He took the battery out of his RV and is trying to charge battery on his work bench. In the process of hooking up his battery he found His elec cord to RV fell out or got pulled of socket. Maybe when cleaning garage or something. At any rate, The cause of his battery problem has most likely been found. Pretty hard to keep RV charged up with no juice since last Nov.

Cheap, easy fixes are the best type of repair. :)Thanks for the update.

Even dead, I'm not sure it would freeze at 15F. Pure water freezes at 32 but the battery water even dead is far from pure which drops the freezing point substantially.

If battery has been unplugged since last November it likely froze. It would have been fully discharged in about 2 weeks and would likely freeze the next time it got to about 20 degrees for a day or two.

Battery's freezing? | Good Sam Community

AJBert
Explorer
Jun 30, 2016
I must have some very uninformed batteries. I have a dual (starting) and deep cycle batteries for my boat, which both sat out the last couple of winters with our coldest temps being -15F. Come spring they both still had a charge and never froze. No, they were not hooked up to a trickle charger over the winter nor did I ever bother to check them.

The TT battery was kept charged and no problem with it either. It also set outside over the winter and I did check the power panel whenever I wandered into the trailer.
Chuck_thehammer
Explorer
Jun 30, 2016
AJBert wrote:
I must have some very uninformed batteries. I have a dual (starting) and deep cycle batteries for my boat, which both sat out the last couple of winters with our coldest temps being -15F. Come spring they both still had a charge and never froze. No, they were not hooked up to a trickle charger over the winter nor did I ever bother to check them.

The TT battery was kept charged and no problem with it either. It also set outside over the winter and I did check the power panel whenever I wandered into the trailer.

my Quote from above
parasitic draws .. inside and outside of the battery... make a Big deal

some people have great Luck with batteries in Cold.. some never do.

some people have great Luck with batteries in Cold.. some never do.

age, the purity of the acid and water.

the amount of sludge under each cell.. YES all used batteries has Some.

END of Quote:

I have replaced MANY batteries for people . that the battery was working fine the day before the cold snap...
retired auto mechanic 43 years.

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