While electricty can stimulate them, nerves actually work on a chemical basis, not electrical, according to more recent research - though how that works with an electroencephalogram Ihaven't the foggiest. As for the rest... If it's specifically stated that the watch stopped because the battery stopped providing powr, then that pretty much has to be a specifically designed effect to kill electrical devices, becasue a battery also works on a chemical basis, trading electrons around between the poles and electrolyte.
Of course, the real explanation is that the autoress says electronics don't work at Hogwarts, so anyone wanting to write otherwise in a fanfic can use whatever explanation they want, right down to an aiuthors note saying they're going to ignore it because they feel like having electronics in their story.
- CDThat which does not kill us... has made its last mistake.
SERVO: Loook *deeeeply* into my eyes... Tell me, what do you see?
CROW: (hypnotized) A twisted man who wants to inflict his pain upon others.
" It's crazy to try to spell out all the mega-nooks and hyper-crannies of a Borg contrivance." - Doug Drexler
--
"Anko, what you do in your free time is your own choice. Use it wisely. And if you do not use it wisely, make sure you thoroughly enjoy whatever unwise thing you are doing." - HymnOfRagnorok as Orochimaru at SpaceBattles
woot Med. Eng., verb, 1st & 3rd pers. prsnt. sg. know, knows
Of course, the real explanation is that the autoress says electronics don't work at Hogwarts, so anyone wanting to write otherwise in a fanfic can use whatever explanation they want, right down to an aiuthors note saying they're going to ignore it because they feel like having electronics in their story.
- CDThat which does not kill us... has made its last mistake.
SERVO: Loook *deeeeply* into my eyes... Tell me, what do you see?
CROW: (hypnotized) A twisted man who wants to inflict his pain upon others.
" It's crazy to try to spell out all the mega-nooks and hyper-crannies of a Borg contrivance." - Doug Drexler
--
"Anko, what you do in your free time is your own choice. Use it wisely. And if you do not use it wisely, make sure you thoroughly enjoy whatever unwise thing you are doing." - HymnOfRagnorok as Orochimaru at SpaceBattles
woot Med. Eng., verb, 1st & 3rd pers. prsnt. sg. know, knows