a maintenance-free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid
a maintenance-free battery has a relatively short shelf life when compared with standard batteries
since it is sealed, the water in a maintenance-free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water
recharging of a mainte
✅ The correct answer is option C.