starting-lighting-ignition battery

Also known as: SLI battery

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Last updated

July 14, 2026

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A starting-lighting-ignition (SLI) battery is a type of lead-acid battery primarily used in automobiles. Its main purpose is to provide the high current needed to start the engine, power the vehicle's lights, and operate other electrical accessories when the engine is not running or at low speeds.12

The electrical system of a car includes the battery, generator, starting motor, lighting, and ignition systems. The ignition system, which uses the battery's power, is responsible for creating the spark that ignites the fuel-air mixture in the engine's cylinders. SLI batteries are designed for numerous shallow discharges over several years and are a well-known portable rechargeable power source.132

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battery
Lead-acid batteries
…classified into three groups: (1) starting-lighting-ignition (SLI) batteries, (2) traction batteries, and (3) stationary batteries. The automotive SLI battery is the best-known portable rechargeable power source. High current can be obtained for hundreds of shallow-depth discharges over a period of several years. Traction batteries are employed in industrial lift trucks,…
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…classified into three groups: (1) starting-lighting-ignition (SLI) batteries, (2) traction batteries, and (3) stationary batteries. The automotive SLI battery is the best-known portable rechargeable power source. High current can be obtained for hundreds of shallow-depth discharges over a period of several years. Traction batteries are employed in industrial lift trucks,…
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