It has almost never been used on backup because our power is so reliable here.

So far I have been through one power outage with this product as well as a power flicker that caused my devices to restart.

We use it for a device that does not need much power, so even if we lose power from the grid, this device should keep the settings in the device for several hours.

Good power and easy setup.

Worst Power Supply EVER!Shuts down on the simplest of loads...my computer.

Today it started acting like power was cutting out and wouldn't switch back to the mains

I'm not knocking cyber power, I actually really like their more powerful models.

I keep getting errors that there isn't enough power coming to the battery side.

long beep ! not enough power for my gaming computer!I connected just my computer power cable to the battery+surcharge!

Small enough, and yet enough power to do the job, just plug in and use

I have been sitting watching TV and the thing starts beeping for no reason at all without any power loss or interruption

We are always having power outages and these work great for our short term needs.

It's cheap, but I won't last so avoid this cheap power supply.

Must have for clean power and long lasting electronics.

It's a small price to pay for the insurance these things offer against losing your work when the power fails or worse yet a sudden power failure without time to shut it

Power flickered yesterday (lots of thunderstorms this time of the year) but no interruption to services thanks to the power backup

So we're getting power fluctuations fairly regularly but not losing power at all