A Light Motor Vehicle (LMV) battery typically consists of lead-acid cells, containing a mix of lead dioxide and sponge lead plates submerged in a sulfuric acid solution. These batteries produce electricity through a chemical reaction between the lead and the acid, providing power to start the engine and run electrical systems when the engine is off. Modern LMV batteries often include safety features like spill-proof casings, and some may be maintenance-free, requiring no water top-ups during their lifespan.