An uninterruptible power supply (UPS), also known as a battery backup, provides backup power when your regular power source fails or voltage drops to an unacceptable level. A UPS allows for the safe, orderly shutdown of a computer and connected equipment. UPS that supplies power to the AC load in normal operation and uses an inverter to provide AC power during a power failure. You just plug your PC's and your screen's power cable into the UPS, then plug in the UPS, turn it on, turn your computer on and you are ready to go.An UPS is mandatory to protect critical loads from utility-supplied power problems, including spikes, brownouts, fluctuations and power outages, all using a dedicated battery. Sri balaji batteries are the top leading dealers of Home UPS system batteries with good quality brands.