Why Does My Car Battery Keep Dying?

Why does my car battery keep dying?
LocationMilwaukee, Wisconsin
DateApril 21, 2021
Does your car battery keep dying? We might be able to help. First of all, fully-charged car batteries will measure at least 12.6 volts (with the engine turned off). If your battery is well below that level, then it may be deeply-discharged. Do you have a battery charger? If so, try charging your battery with a battery charger.

We hear from a lot of folks who mistakenly believe if they jump-start their car, the alternator will recharge their battery. That is a bad idea. Alternators are designed to maintain a battery near a full state of charge, not recharge deeply-discharged batteries. Trying to use the alternator to recharge a deeply-discharged battery can shorten the lifespan of the alternator and battery and lead to a cycle of dead batteries and jump-starts until one or both of them fail. 

Modern electrical accessories, like satellite-based communication systems and car alarms can discharge a battery in a matter of days and make people believe their batteries are dying, when they are only being discharged. If you have high-demand electrical systems in your vehicle, like those described in the video below, we recommend periodically using a quality battery charger or maintainer, to maximize battery performance and lifespan.

If you don't have a battery charger, we recommend using a quality battery charger that is microprocessor-controlled and can deliver the amperage your battery needs, when it needs it. OPTIMA Digital chargers and maintainers are very simple to use and work on 12-volt lead-acid batteries, including AGM batteries. You can buy them factory-direct right here.