Which interrupter to choose? The main criterion, did not kill the battery quickly?

Question

Uninterruptable power source

What uninterruptible power supply advise for 1 pc, a printer is connected. What would work, about 5-10 minutes. without power, and to keep network instability well. Approximately a month there are 2-5 cases of a drop, network instability 1-3 minutes.
I need exactly proven uninterruptible power supplies that have served for a long time, which do not spoil the battery too quickly.

Answer 1

which do not spoil the battery too quickly.

There are lead batteries.
The cheapest that mankind has come up with.
They cost about 500 rubles. Changes every 2 years.
In your case, with a high probability everything is sad - due to constant interruptions.
You need not a cheap uninterruptible power supply that can work offline.
And expensive, able to work online.
The printer is still sadder. If it is laser and not in hibernation mode, it consumes a huge amount of electricity.
This is how we determine the power:
alstyle.ru/partners/calc.php
If it is firm, then you can trust the numbers.
If cheap Chinese - feel free to add 30%, they are lying.