What is the safest way to power down my device?

So recently my switch just got the error code 2165-1001 and the error message specifically says to power down the console using the power button. However, my console's power button hasn't worked in about a year, if not longer, and I haven't had a chance to replace it myself or the opportunity to get it fixed. Is it safe to let the console die and then charge it? Or is there a safe way to power down the console in this case? Again, I cannot use the power button as the power button does not work.