APCBack-UPS CS Battery Backup System Six-Outlet 500 Volt-Amps (APWBK500)

Security backup

Great product...had one before and they both perform at their best.

Unit goes off line intermittently; waste of good money and time. Had my tech open the box only to discover the power cables were NOT connected to anything, yet the UPS has a quality control test report taped to the box. How in the world could this box pass quality control when the power cables were not even connected to anything? Questionable supplier. Got a full refund though.

Very happy

I just purchased this battery backup. Had no issues with the packaging, delivery and installation. I do have a problem with a low pitch noise it has going on, which began the moment I plugged it into the outlet. For me, it's quite irritating. I've never experienced that with previous APC backups, which is my brand of choice. I'm pretty much stuck with it because I removed the stickers and other verifying info attached to the unit while hooking up the battery.

Agree with other review about noise. Persistent intermittent cyclical short buzzing sound. ? Charge coil hum. Shorter cycle if on. Longer if off but plugged in. Unfortunately outside return window. Never had this issue with other past APC backups. Avoid if it will be used in otherwise quiet location.

Product came as advertised. Shipping was completed on time.