These are also known as valve-regulated lead-acid or VRLA batteries or sealed lead-acid batteries. Technically, VRLA or sealed lead acid can also refer to gel cells, but in automotive applications ...

All lead-acid and valve-regulated lead-acid batteries (VRLA or sealed maintenance-free car batteries) produce lead sulfate when discharging stores up power. The lead sulfate reverts to lead ...

A lot of us will own a lead-acid battery in our cars without ever giving it much thought. The alternator keeps it topped up, and every few years it needs replacing. Just another consumable ...