[zencat]

Various components must be periodically "refreshed" to keep a fusion bomb functional.

These small devices would have to be fission, but other than that you're correct. They require maintenance and have components that degrade.

[MeanWestTexan]

It is my understanding that Russia has a full-fledged suitcase fusion (hydrogen) weapon. The fission warhead to trigger the fusion is the size of a grapefruit.