How long should you drive to recharge the battery after a jump start?

[Marissa]

After the car battery runs out of power, using the car's alternator to fully recharge the battery requires maintaining an engine speed above 2000 RPM, and the vehicle needs to be driven for at least 4 hours. If the engine speed cannot reach 2000 RPM, the charging time will be even longer. Relevant information about car batteries is as follows: 1. Introduction: A car battery, also known as a storage battery, is a type of battery that works by converting chemical energy into electrical energy. Typically, what people refer to as a car battery is a lead-acid battery. This is a type of battery mainly made of lead and its oxides, with sulfuric acid solution as the electrolyte. 2. Working Principle: It uses lead plates filled with sponge-like lead as the negative electrode, lead plates filled with lead dioxide as the positive electrode, and a 22-28% dilute sulfuric acid solution as the electrolyte. During charging, electrical energy is converted into chemical energy, and during discharging, chemical energy is converted back into electrical energy.