WARNING: Contains graphic images!
Oh boy, I missed out on this gemstone 
@Perpetuapolyphemus, let me join to the conversation please! 
INTRO
For the sake of some brain exercise please let me join the conversation! I will ignore ethical, philosophical or any moral background of the project. It seems to be well-discussed =)
I’ll pretend like there was a cyborg movie, where some has stunning implant, literally, and we have to reverse-engineer the story:
Our hero, who I will call Arnie, 
has 2 gold studs implanted
at position 1 and 3 on both hands. 
Arnie is a body guard, 
so he wants to knock out enemies. 
(و •̀ ᴗ•́ )و
He knows from experience 
that 10 000uF is plenty of capacity to be scared of 
,
so he has 2 solid state capacitors encapsulated and implanted in his forearms,
because the skin is rather loose there.
Arnie experimented before
with different stuff,
however his piercer recommended him a 450V upgrade. Now he is not only stunning, but also shocking =)
The capacitor’s pins are connected to the surface studs via mesh conductors, those are encapsulated in polymer.
The shocker is charged by an external device, by placing the studs against a high voltage output.
Arnie is very careful when charging his implant,
he remembers little Billy 
having his capacitors exploded
when those implanst got over charged.
It wasn’t fun mopping up that mess little Billys arm left that day…
Later Arnie realises that this amount of stuff restricts him in using his hand,
admits it was silly
idea getting those implants ¯\ (ツ)/¯ ︵ ┻━┻and opting for the exo-skeleton
, that was suggested by @PilgrimsmasterHe drops it off at the hack space around the corner to be equipped with thermal grill (do your research!) conductors for further fun.
The End
PS.: He became religious, like Jules in Pulp Fiction, made friends with and eel, who lives in his pocket since then, shocking people around the globe. They lived happily ever after… 
To summerise: possible in theory, but not recommended.