A Car Dry Battery NS40 AL is a 12-volt automotive battery that’s commonly used in many small to mid-size cars. The name tells you a few important things:
NS40 — This is the battery size/type code, which determines the physical dimensions, shape, and terminal positions so it fits properly in certain vehicles.
Dry battery — This usually means it’s sealed and maintenance-free (you don’t add water). It’s also called a dry charged or sealed lead-acid battery.
AL — Often stands for “aluminium” terminals or simply a model variation used by some manufacturers.