How many days can a car battery last normally without being used?
2 Answers
Car batteries can last for two months without being used. When a car is stored for a long period without being driven, the positive and negative terminals of the battery should be disconnected to prevent natural power consumption by the vehicle's electrical appliances. If the battery runs out of power, driving normally for one to two hours can restore the battery to its normal charge level. If the battery is too depleted to start the engine, a jump-start is required to activate it. Below is an introduction to car batteries: A car battery is a device that converts chemical energy into electrical energy, serving as a DC power source. Its functions include: 1. Providing a strong starting current to the starter when starting the engine. 2. Assisting the generator in supplying power to electrical equipment when the generator is overloaded. 3. Supplying power to electrical equipment when the engine is idling.
My car was fine after being parked for two weeks during a business trip, but once it couldn't start after being parked for three weeks. A normal battery can last 10 to 15 days without issues, with new batteries lasting longer and old ones shorter. There are many influencing factors: high temperatures speed up discharge, and sub-zero temperatures also accelerate power loss; electronic devices in the car like alarms or dash cams consume power; parking in a garage is better, while being exposed outdoors is worse. I make it a habit to start the car for 5 minutes every week to recharge, which is simple and effective. The car dealer mentioned regularly checking the voltage—using a multimeter, a reading above 12.6 volts indicates good health. Long-term parking significantly drains the battery, shortening its lifespan, so preventive measures are necessary.
