What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series ?

Advantages of connecting electrical devices in parallel: (1) When the appliances are connected in parallel with the battery, each appliance gets the same potential difference as that-of battery which is not possible in series connection. (2) Each appliance has different resistances and requires different currents to operate properly. This is possible only in parallel connection, as in series connection, same current flows through all devices, irrespective of their resistances. (3) If one appliance fails to work, other will continue to work properly.