No, you do not.
A deck 'works' because your own intuition and subconscious interprets the cards that come up. 'Charging the cards' is not needed.
I'll never tell.
First, abandon logic and reason.
Shuffle your visa or mastercard into them. Discover also works. Then say "hooffus-pooffus I'm a doofus" 3 times while walking clockwise naked and holding an ostrich feather. Post it on youtube. I wanna see.