Automobile Engineering in ME
The function of anti-lock brake system (ABS) is that is

Minimizes the brake fade
Maintains directional control during braking by preventing the wheels from locking
Prevents nose dives during braking and thereby postpones locking of the wheels
Reduces the stopping distance

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Automobile Engineering in ME
The main characteristics of a maintenance free (MF) battery is that

Recharging of a maintenance free battery is neither required nor possible
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
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

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