APC UPS Battery Backup for Computer, BE550G Surge Protector with Battery Backup, Dataline Protection

does what it's designed for. The only thing I don't like is not being able to disable the feature that turns off the UPS when connected to a computer and that there is a power failure. The feature is there to prevent the computer from turning back on after shutting down properly (thanks to the software that comes with the UPS) so it waits about 3 minutes to give enough time for the computer to shut off and then it kills the power completely. So if there is a power restore within that 3 minutes, it will kill the power still and turn it back on right away, resulting in a reboot for anything that was plugged in. Other than that, it's a great product, the battery is easy to access and replace when the time comes.

Adquirí este UPS para proteger un NAS WD My Cloud EX2 Ultra (cabe mencionar que no todos los UPS son soportados ) y hasta el momento no he tenido problema. Recientemente tuve que cortar la alimentación de mi casa para realizar mantenimiento a la red eléctrica. El corte duró aproximadamente 1 hora y el UPS se comportó excelente manteniendo el NAS, un modem y un router encendidos todo el tiempo.

These are a must have for a 3D printer. I've lost a few prints because of power flashes, but this is going to be a game changer. I used to be so nervous if a thunderstorm rolled in during a print, not anymore. Luckily I haven't had to fully utilize it yet, but I tested it by unplugging the power cord from the wall. Flawlessly kept printing.

Siempre me recomendaron la marca APC cuando buscaba un UPS para mi computadora de escritorio y la verdad no me ha decepcionado. El producto llego en tiempo y forma, y en excelentes condiciones. Lo he estado usando por un par de meses y ha respondido como esperaba, ahora ya no tengo que preocuparme por estar jugando mis videojuegos favoritos en linea y tener una desconexión imprevista. La verdad recomiendo mucho el producto y el vendedor.

This product is just right for providing power to a few small electronic items, like a cable modem, router, and printer. It works well. I tested it by unplugging it from house current, and it worked. The connected devices kept working. This is not a real UPS, but it is fine for home use. A real UPS provides continuous power - it always provides power from the battery. This product does not do that. Instead, it normally gives power from the house current. When the power in the house goes out, this unit cuts over to the battery in a fraction of a second. So it is not continuous power. But it is fine for home use. The change to battery power is so quick that the powered devices do not go down - they stay running normally. I saw one review by someone whose printer stopped during the change from house current to battery. He said that a print job took days to finish. I am guessing that he was using a 3D printer. It is possible that those printers are more sensitive to power fluctuations, and must have a real UPS (see my description above for the difference between this unit and a real UPS). All I can say is - as soon as you install this unit, attach and turn on your connected devices, start printing something, and test this unit by pulling the plug. If any of your connected devices stop working, replace this with a real UPS (for a much higher price). I would recommend this for any home user, to power a few small items. I did not rate any of the features - WiFi signal, tech support, and sleep mode. I did not use tech support, and the WiFi and sleep mode features do not make any sense.