It's good that don't have to build a new mound bed every time, but would like add a few improvements.
1) Show the range of the Mound Bed.
Constantly using "build Mound Bed" to check its range is inconvenient.
2) The ability to refill it before it stops working. 1 charge is used up - you can refill it.
It's crucial in winter.
3) Show the percentage of its fullness.
So there's information and an approximate idea of when it needs to be filled.