Reduced Battery Capacity: A dead cell means one or more of the battery's cells are no longer able to store and release electrical energy effectively. As a result, the overall capacity of the battery is reduced. This means the battery can't hold as much charge as it should, leading to shorter periods of operation before needing a recharge.
Lowered Voltage Output: A dead cell can cause the battery's voltage output to drop below normal levels. A healthy car battery typically maintains a voltage between 12.6 and 13.2 volts. When one or more cells become dead, the battery voltage may drop to below 12 volts, which is insufficient to power the vehicle's electrical systems effectively.
Increased Internal Resistance: A dead cell can increase the internal resistance of the battery. This resistance restricts the flow of current between the battery and the electrical components it powers. As a result, the battery struggles to deliver the necessary power to start the engine and run the vehicle's accessories, leading to slow engine cranking or failure to start altogether.
Overcharging: In an attempt to compensate for the reduced capacity of the dead cell, the battery management system may try to overcharge the remaining healthy cells. This overcharging can lead to excessive wear and tear on these cells, further shortening the battery's lifespan.
Reduced Lifespan: A dead cell compromises the overall health and integrity of the battery. The combination of reduced capacity, lower voltage, and increased internal resistance puts additional strain on the remaining healthy cells, accelerating the battery's degradation. As a result, a battery with a dead cell is more likely to fail prematurely and need replacement sooner than a healthy battery.
It's important to note that while one dead cell can have these negative effects, multiple dead cells will only amplify the issues and cause more severe performance problems. If you suspect a dead cell in your car battery, it's best to have the battery tested and replaced if necessary to avoid potential starting problems and other electrical issues.
