What is the impact on the battery if the rearview mirror heating is not turned off after the engine is off?

[JamesDella]

Not turning off the rearview mirror heating after the engine is off has no impact on the battery. Car battery lifespan: Car batteries are generally replaced every two years, but the actual lifespan depends on the type of battery, usage conditions, and maintenance. Typically, standard batteries last about 2-3 years, while most modern cars use maintenance-free batteries, which are more durable and have a longer lifespan, usually lasting around 3-4 years. Purpose of car batteries: The primary purpose of car batteries is to provide power for starting and lighting in vehicles such as cars, motorcycles, tractors, and diesel engines. Car batteries act as voltage stabilizers for the entire electrical system, mitigating voltage surges and protecting electronic equipment in the vehicle.