Maintains a seal and prevents escape of burned gases and oil leakage
Lubricates the cylinder wall by releasing oil from its hole
Prevents engine oil from going into the combustion chamber and returns excess lubricating oil off the cylinder wall through the return holes in the piston to the oil pan
Keeps the cylinder wall lubricated by holding oil in its channel
Recharging of a maintenance free battery is neither required nor possible
Since it is sealed, the water in maintenance free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water
A maintenance free battery has a relatively short shelf life when compared with standard batteries
A maintenance free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid
EXAMIANS