Uninterruptible power supply
OverviewCommon power problemsTechnologiesOther designsForm factorsApplicationsHarmonic distortionPower factor
An uninterruptible power supply (UPS) or uninterruptible power source is an electrical apparatus that provides emergency power to a load when the input power source or mains power fails. A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide near-instantaneous protection from input power interruptions, by supplying energy stored in batteries, supercapacitors, or flywheels.
Best Uninterruptible Power Supply (UPS) in 2025
To find the best uninterruptible power supply, I researched dozens of models from the leading brands in this space. My selection process focused on
10 Home Applications that Uninterruptible Power Supplies
The most important problem it solves is keeping your Wi-Fi router and modem online. These devices are the brain of a smart home, and when
The Best Uninterruptible Power Supply (UPS)
The CyberPower LE1000DG is the best UPS for people who want
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