How Many Years Does a Normal Car Battery Last?

[DeGabriela]

Generally speaking, if the battery is located in the engine compartment, its lifespan is approximately 2-4 years. If the battery is placed in the trunk, as in Audi models, it typically lasts around 6 years. Relatively speaking, the battery's lifespan is quite long, though this is also closely related to regular maintenance. Below are measures to avoid shortening the car battery's lifespan: 1. Avoid deep discharging; Most vehicles are equipped with lead-acid batteries, whose basic structure consists of two "shovels" called positive and negative plates inserted into a square box filled with sulfuric acid electrolyte. During deep discharging, the reaction between the electrolyte and the plates produces a large amount of lead sulfate, forming irreversible crystals. Between 35—45℃, every 1℃ increase can extend the battery's cycle life by over 25 cycles. Above 50℃, however, the lifespan decreases due to sulfation of the negative plate. 2. Avoid relying solely on battery power after turning off the engine; The battery experiences minimal loss when in a floating charge state.