What type of battery is most commonly found in modern vehicles?

The most commonly found battery in modern vehicles is the lead-acid battery. This type of battery has been used for decades in automotive applications due to its reliability, cost-effectiveness, and ability to provide high burst currents necessary for engine starting. Lead-acid batteries come in different types—conventional flooded, absorbed glass mat (AGM), and sealed lead-acid—which all serve specific applications within the automotive sector.

While lithium-ion batteries are becoming increasingly popular, especially in hybrid and electric vehicles due to their higher energy density and lighter weight, traditional gasoline and diesel-powered vehicles predominantly still utilize lead-acid batteries for their starter, lighting, and ignition (SLI) systems. Other battery types, such as nickel-metal hydride (NiMH), are mainly used in specific hybrid vehicles but are less common than lead-acid batteries overall. Understanding these distinctions helps in recognizing the widespread use and application of lead-acid batteries in the automotive industry.