how do dead batteries work for a little while if you put them out in the sun?

Question

or is this just a myth?

Answer 1

Heat and cold DOES have an effect on how a battery functions. A battery in cold conditions doesn't function as well. Think about the difference between how your car starts in the winter and how it starts in the summer.

Answer 2

It could possibly be just be a myth, but if it is true the reason would be because the sun heats up the molecules and particles inside of the battery causing them to become more active.



In a abstract essence, it's like giving someone caffeine because it boosts the person's energy levels. It's the same with the chemicals located inside of the battery.