They request you rent from the hotel and not bring one from home
When you rent them, it will be in a cart stand that is approved by the standards the hotel requires due to the fire code
If housekeeping sees you have your own in the room. They would report it to their supervisors
You do what you want but I would not chance it
I have no personal opinion if peeps do this but need to say it could be an issue for you
If a micro is needed for a medical need or small child for bottle warming, have read in the past front desk has waived the daily fee for it