VS and DL power supply question

I'm on a VS A346 to/from Boston in upper and then 4 DL flights around the USA (MD90, B737-7, MD88 and A320).

Two questions if i may:

I know on VS A330's there is USB ports, but is there an equivalent on the VS 346's (or can i use my charger adapter)? Also

What do the power ports on those DL plane types look like? Can i plug in my UK adapter or just a USB cable directly? (according to the app all but the A320 DL planes have power sockets).

Appreciate the info!

Hi, the A346's use EmPower which requires an adapted you can get from Amazon or Maplin etc.

Delta in seat power info is here:
https://www.delta.com/content/www/en_US ... vices.html

Thanks for the clarity. I'll ask on the plane if i can get an adapter to use for the flight, and i've bought a spare charger to carry with me (plus i always have a portable charger too!)