I have had this discussion before. Some people can't fathom 70s hurting batteries. But if you notice around here how many southerns have short battery life. Though you don't know how much they ride.

My lawn mower, sled, atv, sxs, all live in unheted barns. I put a charge on them once in the winter. The ATV more cause used for plowing. But I don't cut grass in the winter.

Sure leaving battery forever in he cold isn't good for it. But it tends to discharge them, not harm them like the heat does. I am just to lazy to bring a $30 mower battery in.

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While it’s true that winter is a fairly common time for car batteries to die, some sources actually suggest that more batteries die in the summer than in the winter.

The science behind lead acid battery technology actually shows how both hot and cold weather can be unkind of the life and operation of a car battery. Even though the hot weather is a real battery killer, for a number of reasons, cold weather is also hard on car batteries.
While it’s true that winter is a fairly common time for car batteries to die, some sources actually suggest that more batteries die in the summer than in the winter.

The science behind lead acid battery technology actually shows how both hot and cold weather can be unkind of the life and operation of a car battery. Even though the hot weather is a real battery killer, for a number of reasons, cold weather is also hard on car batteries.


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Note the tone. These are articles written for consumers.

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Cold Cranking Amps (CCA) CCA is a rating used in the battery industry to define a battery's ability to start an engine in cold temperatures. The rating refers to the number of amps a 12-volt battery can deliver at 0°F for 30 seconds while maintaining a voltage of at least 7.2 voltss
In some ways, the standard for CCAs is more of a marketing concept than a technical form of measurement for a battery’s output – it was started by the battery industry itself, and has stuck around in the mind of consumers for decades. Nevertheless, CCAs have now become the industry standard for measuring a battery’s starting power, and the term’s usefulness is in providing an apples-to-apples comparison when shopping for batteries.

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Both extreme cold and extreme heat cause problems, but heat-related problems are more serious because they damage the battery. Vehicle batteries contain fluid. ... If a battery's fluid levels drop significantly, that can cause irreversible damage to your car battery.Apr 10, 2016


Higher temperatures will increase the self-discharge of the battery, so you may have to charge the battery more frequently if you don’t drive the vehicle very often.

Extremely hot weather and overcharging are the two main reasons for shortened battery life, according to the Car Council.




https://www.google.com/search?q=heat...hrome&ie=UTF-8

 

A battery will not freeze if it is charged.

A discharged battery will freeze, because the plates absorb the acid, leaving the water behind.

 

I'm well aware of why a battery will freeze, but that wasn't the question asked.

 

Maybe not everyone here knows that, and that is why I posted the information.

 

I have never had one completly discharge over a winter, sure it can happen. I used to bring them inside, I just got to many batteries. Not saying I is a bad thing. But I do leave the battery in my sled all winter.