Amazon.com: APC Back-UPS Battery Backup & Surge Protector …

Among many other things, you can use the software to configure and monitor the UPS device. You can disable the alarm completely or during certain hours. You can set an interval shutdown for your PC following a power failure (mine is set to 1 minute). The PowerChute screen displays the estimated battery time (mine displays from 50-60 minutes).

https://www.amazon.com/APC-Back-UPS-Battery-Protector-BE750G/dp/B000Z80ICM