An Uninterruptible Power Supply is a device that sits between a power supply and your computer and other valuable electronic equipment to prevent undesired features of the power source from adversely affecting the performance of your devices.

Those undesired features include blackouts, power sags and power surges, etc.
Your equipment can maintain optimum performance and lifetime with UPS power protection.
UPS power can provide continuous, optimal power supplying in the event of a power down instead of utility line.
The UPS Power can resume within 4 to 8 milliseconds, or even 0 milliseconds, which depends on different types.

A UPS Power has internal batteries to guarantee that continuous power is provided to the equipment even if the power supply stops providing power.
It depends on how big a UPS power do you have and what kind of equipment it protects.
For most typical computer workstations, one might have a UPS that was rated to keep the machine alive through a 15 minute power loss.
If you need a machine to survive hours without power, you should probably look at a more robust power backup solution.
Even if a UPS power has a very small load, it must still operate it's DC (battery) to AC converter, which costs power.

Shenzhen SORO Electronics Co.,Ltd. is a professional manufacturer in the field of ups power electronics for over 10 years.
If you have any other ups power questions please contact us