There had been no thunder storms or power failures.

The UPS models without AVR (automatic voltage regulation) only protect your equipment from a power failure, and massive surges

One power failure corrupted my wife's computer data without a UPS (so I had to restore the operating system)

A simulated power failure worked as hoped.

The software is unable to send out e-mail or text notifications in the event of a power failure.

i have a major computer network and this UPS is the only one that will keep me up and running in a power failure situation of more than 2 minutes.

so it doesn’t drain the batteries and rely on the UPS in case of a power failure

Has not been challenged by a power failure.

I haven't had a power failure yet though to test how long it actually keeps my routers, modem and phone system up and running -- a must for emergencies.

It is preventing damage to my computer from all the little micro-power failures in my neighborhood

So I guess if you have 1 power failure, your going to need to buy a battery each time that happens?I continued to use this product without buying a battery, and it continued to work even though it complained about needing me to buy another battery

During a power failure, it damaged the power supply in my Dell XPS desktop

all of the outlets on the left side of the unit are AC only (no power if power failure).

If your units are frequently having to charge and discharge due to power failures you might not get 2 years out of them.

A simulated power failure worked as hoped.

Has saved me a number of times at home already, during power failures.

Perfect backup for sudden power failures.

The second unit will not hold a charge after experiencing one brief power failure.

I use a QNAP TVS882 and wanted to protect the integrity of the drives from power failures.

It also provides backup power so that I can do an orderly power down in the event of a power failure.

Definitely worth the money not just for total power failures, but for power glitches and power surges.

The first one I use to keep my networking hardware running in the event of a power failure

It's kept me going through a few power failures, and has successfully signaled my computer to save whatever work it can and shut down before the battery died whenever a power failure lasted too long.

I recently experienced a power failure and this unit kept all the electronics plugged into it going, including internet access

I let the unit charge to full capacity and then plugged in my critical componenets: modem, router, WiFi AP, network switch and NAS to keep the network and VOIP land line going during a power failure

I have mine connected to my surveillance TV system so the system does not need to be manually reset after a power failure.

This APC back-ups pro works great, and tells me how many times a power failure or flection has accrued

This device backs up your electronics in the event of a power failure, the devices will not be damaged

I run my gaming rig out of it in addition to my laptop and mini fridge and the battery still lasts long enough to casually shut down my computer in case of a power failure

Select personal parameters to allow for controlled power shutdown on back up battery power if prolonged power failure

You would hope that Amazon would have newer inventory of these units, or that Amazon wouldnt knowingly carry defective units, but clearly from the reviews on Amazon, it's still hit or miss as to whether or not you will order an APC BR1500MS (or BR1000MS, etc) and get one that doesn't chirp

The instructions need to be improved as they seem to be disorganized.

A great product and it works as it should.

The battery will still bleed even if it outside the APC but not as fast as when it is inserted in the usable position

Overall I highly recommend it as I have had many of these over the years and they have never let me down.

Works as it should.

Great as usually

Mine does it but it does not bother me as much as it bothers some of the reviewers.

Not as bad as I first thought

Other companies are certainly improving, but when it's critical I always go with APC.

Power outage at the house (Storm), lost connectivity (router, etc.)...the "U" in UPS is false with this thing