Many (most) cheapo UPS units aren't really worth it. The inverters are usually shit modified-sine type which can cause issues with sensitive PSUs and the cheap lead-acid batteries inside degrade almost immediately, so a false economy imo.
I'd spend the extra on a pure-sine UPS from a decent brand like Riello/Eaton, ideally 'on-line' type as opposed to 'line-interactive', although this last bit isn't as important. APC is the gold-standard, but they're spenny.
What will it be backing up?
Many (most) cheapo UPS units aren't really worth it. The inverters are usually shit modified-sine type which can cause issues with sensitive PSUs and the cheap lead-acid batteries inside degrade almost immediately, so a false economy imo.
I'd spend the extra on a pure-sine UPS from a decent brand like Riello/Eaton, ideally 'on-line' type as opposed to 'line-interactive', although this last bit isn't as important. APC is the gold-standard, but they're spenny.