Just what you need after another long day is to go the separate access of your 'budget' hotel, wait ages to go up an incredibly small and rickety lift, get to your door and the key card no longer works! Meaning another tempting death ride in the lift, going outside to walk up to the hotel other entrance to get the thing renewed.
Advances in tech aren’t always great, keys tend to stay working but I assume have higher running costs, why don't hotels simply register your handset to the system when you check in then they could be used to open the door as you approach?
Of course this would still fail if they only register you for one night when you are actually staying for two :-<