
You might be surprised to learn that most of the damage to your battery is done in summer, when high temperatures drive up the heat under your hood and accelerate the onset of failure. If your battery is aging, wintertime’s low temperatures and thickened engine oil could be the final straw.

Your first indication of battery failure might be a no-start, but you may have missed an earlier, more subtle warning. Complicating matters, those are the same warning signs as a failing charging system or failed alternator.