How Long Can a Car Battery Last Without Use and How Long to Fully Charge It?

[DiCassandra]

An unused car battery can last for about two months. When a car is left unused for an extended period, the positive and negative terminals of the battery should be disconnected to prevent natural power drain from onboard electronics. If the battery is drained, driving normally for one to two hours can restore it to a full charge. However, if the battery is too weak to start the engine, a jump-start may be required to reactivate it. Below is an introduction to car batteries: A car battery is a device that converts chemical energy into electrical energy, functioning as a DC power source. Its main purposes include: 1. Providing a strong starting current to the starter when the engine is started. 2. Assisting the generator in supplying power to electrical devices when the generator is overloaded. 3. Supplying power to electrical devices when the engine is idling.