[Hrnrurj]

Voltage check on battery is part of regular PC maintenance. Like cleaning dust, checking all fans are spinning, capacitors are not getting bigger, checking for weird sounds in PSU, overnight memtest...

You should do it every year or two...

[shadowgovt]

Funny enough, instead of doing that every year, my policy has been "replace the machine if it breaks" and in general, I've gotten a good five-year cycle out of all my PCs without having to do disassemble-maintenance with an air can and a static strip. This has been good enough because I do enough high-graphics-demand gaming that five years is about the cycle on which some new-shiny has come out that renders my machine too old to play modern games.

Maybe I'm just lucky.

[riobard]

Cannot do that if it acts as the always-on router…

[r2_pilot]

Companies have regularly scheduled (weekly in some cases I know) maintenance windows affecting thousands of people. A home environment with an "always-on" router can surely find a 10 min window (say, 3 AM on a Sunday morning) where nobody cares.