In the realm of uninterrupted power supply solutions, the APC 900VA / 540W UPS Battery Backup ... Loud Noise: Some models may emit noise; look for low-dBA units if noise is a concern.

The best UPS (uninterruptible power supply) devices on this page are important ... If you are after a cheaper, and more simple, UPS device, then the APC Back-UPS ES - BE700G is a great choice.