My CyberPower UT800EG 800VA/400W UPS has been serving me well for more than 3 years, and it is still functioning well.
It has never failed to protect my Dell XPS 8930 desktop, my Asus RT-AX86U router and Unifi BTU from sudden blackouts and also voltage spikes during thunderstorms.
Anyhow, I anticipate its internal battery, which is not user serviceable, has already reached more than half its lifespan.
Not to take the risk, I decided to get a new UPS, and I found this APC BV1000I-MSX 1000VA/600W Easy UPS as its upgrade.
This APC BV1000I-MSX Easy UPS has 4 universal power outlets (the CyberPower UT800EG only has 3), and it has a larger capacity of 1000VA/600W which is able to provide longer battery runtime. It also has a higher surge suppression rating of 156 Joules (compared with CyberPower UT800EG's 125 Joules).
While transporting, its battery stays disconnected. Before use, we need to connect its battery by using its yellow coloured battery connector at its back. Detailed instruction is available in its user manual.
I have reallocated my CyberPower UT800EG UPS to my living room to provide power protection for my TV, IPTV box and cordless phone.
Even though its battery might run flat in the next 2-3 years time, I think it can still serve as a good AVR to protect those appliances in my living room.