From my past post about devices disconnecting. I’ve suggested to use either a range extender or smart plug which can also acts like a range extender too.
Even though both cost the same price I can see how some people may say how the smart plug would be a better value because of the additional features.
That statement can be true but they may not know that the range extender also comes with a internal battery. So the answer really depends on what devices which you are trying to extend the range for.
Internal battery in range extender
If you’re using the range extenders for the motion sensor, siren, door/window sensor then I would suggest you get the range extender and not the smart plug. The reason for this is because if you ever lose electrical power then these devices can still work for you. While the smart plug will just stop working.