Do valve-regulated lead-acid batteries (VRLA) require regular water addition to the cells?
B.B.Battery2025-01-06
Valve-regulated sealed lead-acid batteries do not require regular water addition to the cells. The key technology of "valve-regulated" lead-acid batteries is "recombination," meaning that the oxygen released from the positive plate largely recombines with the hydrogen ready to be released from the negative plate, thereby producing water and preventing moisture loss.