A car battery can start your engine perfectly on Monday and leave you stranded on Wednesday. No dramatic warning, no obvious breakdown, just a disappointing click when the engine should roar to life. Unfortunately, car batteries rarely announce their retirement plans. They gradually lose their ability to deliver power, sometimes hiding their condition until one demanding start exposes the problem.
Most traditional car batteries last three to five years, although driving habits, climate, and maintenance can change that timeline. But a battery can still operate normally while its remaining capacity shrinks. By the time you notice something unusual, it may have very little starting power left.