Question

write about digital ups

Answer 1

these are good application for learning of world wide ...
I think books are best but these are only Better...they can't take place of book...

Answer 2

An UPS (uninterruptible power supply) is a device that supply power to your computer to running continuing when primary source or power is lost. It also protects our electronics gadgets during unnecessary power lost. UPS a power supply that includes a battery to maintain power in the event of a power outage.