OP and @pigletjohn possibly you can comment.
I still am not clear what a charging drawer is , but I appreciate the thought of having fewer messy wires / devices around etc - that I get.
I have some bookshelves with lighting. I think it is l e d. The unit which gives them power was stuck in a cupboard ( usually closed and actually I had put some other stuff in there. Some of the bookshelf lights stopped working and when the electrician looked the units which "fed" them had burnt through. It was a fire hazard.
Not saying your set up will be at all , but do do make sure that anything which heats up / electrical has enough air circulating round it.
In my earlier years I worked for a company which sold big computers. It was no coincidence the spreadsheet of costs included air conditioning.
I exaggerate for effect but even modern small devices can generate heat.
I do not mean to be alarmist & I am sure your electrican has worked it all out. I must google charging drawer , never heard of it . I take the approach of just -nagging- gently reminding DH and DS that we (I) do not want to see iPads , phones , laptops etc etc and their associated wires all over our tiny house at all times, so could they just possibly have a home and plug of their own. 
The sockets under the kitchen island overhang work well - not obtrusive but near where people sit on kitchen stools so very handy.