That's surprising. My laptop battery is like 10 years old and still fine. Light usage and mild storage conditions. Surely UPS batteries are similar.

UPS batteries tend to have lead acid batteries, and the lifespan on those is generally between 3-5 years. Lithium batteries in laptops _can_ last quite a bit longer if made well and under the right care.

My UPS manual says 3 years. They have a different chemistry than phone batteries. On the other side, they should be quite similar to car batteries which could live much longer that 3 years, but they spend most of their time waiting in a parking slot and then a few starts per day or less. An UPS doesn't work like that.

A good UPS will perform regular load tests to gauge battery performance/degradation. They switch over to battery power around once a week and measure voltage before, during, and after. So even if the power goes out, they are still being exercised _somewhat_.

Can you link to one of these on Amazon or your preferred vendor which you recommend for home office use?

Eaton Ellipse Pro is great.