Is it possible to add "charged abilities" to an item via DLTCEP?

Since this is the tool I'm getting more and more familiar with, my question is as the title. I want to recreate the effect you can see in, for instance, Daystar (Sunray 1/day), Carsomyr (Dispel Magic at level 15) or Staff of the Magi (Spelltrap 1/day).

I can add combat abilities (on hit), I can add equipped abilities (while held/worn) but charged is nowhere to be seen.