You have to get belwo freezing before you can really affect the life of a battery. The worst things to shorten the life of a battery are large, quick voltage dumps and large, quick voltage charges. This means when a battery dies from a major short of being left on all night. Those are examples of voltage dumps. Jump Starts and power surges from shorts and examples of voltage jumps or charges. It is the quick loss or gain that hurts the battery as it takes from it lead core in large chunks that cannot be re-filled if they were pulled off on an atomic level as the way that acid frees electrons in a battery normally and then deposits them back into the lead. This is a slow process. There can be things that may appear that the battery is failing, but it may just be a simple problem.
So, I am giving you a link to an article on batteries, how they work, what affects their lifespan and simple things that can affect their performance. I think it will clear things up for you.
Here is the link;
Friday, January 6th, 2012 AT 4:17 AM