Batteries are used on large scale especially in Pakistan, due to the shortage and shortfall of electricity, these batteries provide a backup power to the whole house with the help of the UPS which is the system that charge and provide electricity from batteries. Dry Batteries are available in the following Nominal capacity 7AH, 12AH, 17 AH, 24 AH, 26 AH, 40 AH, 55 AH, 65 AH, 80 AH, 100 AH, 120 AH, 150 AH, 200 AH, 250 AH.