How Does a Battery Work? Why Won't My Car Start? What Should I Consider When Buying a Battery? Safety and Handling Safety Data Sheet Warranty
← Battery Basics Learn about the difference between a dead battery and a battery that can be recharged

WHY WON’T MY CAR START?

When you ask yourself “Why won’t my car start?” you usually refer to the battery as being "dead," even though that's not technically correct. A battery that's merely discharged—from leaving your headlights on or from a damaged alternator—can be recharged to its full capacity. But a battery that's at the end of its service life can't be recharged enough to restore it to a useful power level. Then it truly is dead, and must be replaced.

If the battery is discharged and not dead, you can jump-start it from another fully charged battery. But if the alternator or another part of the electrical system in your car is damaged, the battery will not recharge and neither a mechanic nor a service station will be able to recharge it. So if your battery keeps discharging, have your electrical system checked before you replace it. What looks like a bad battery could be an electrical system problem. If you have a bad component in the electrical system, it will keep draining a new battery, and you'll be stranded again and again.