Can Batteries Freeze In The Winter?
Granted this is a question we hear mostly in the winter, it is however a question we get asked from time to time.
In a partially discharged state, the electrolyte in a lead acid battery may freeze. At a 40% state of charge, electrolyte will freeze if the temperature reaches approximately 16.0°F (8.9°C).
The freezing temperature of the electrolyte in a fully charged battery is -92.0°F (-68.9°C).
Don’t forget that a good percentage of the electrolyte in your lead-acid battery is water (approximately 75% in a fully charged lead-acid battery).
So those of you in colder climates give your batteries a blankie and keep them where it will not get quite as cold to prevent them from being frozen, just when they’re needed the most.