Qual é o poder da chave de fenda sonora do Doctor?

Há um slot de carregador para o som no console TARDIS.

Pelo menos nas Décima Primeira e Décima Segunda Doutora TARDIS.

• No especial de Natal de 2013 "Time of the Doctor" (grifo meu):

  DOCTOR: A question only I could answer. A truth field to make sure I'm not lying. If I give my name, they'll know they've found the right place and that it's safe to come through.
  CLARA: The Time Lords? Okay, so what then? If you answer the question and they come back, what happens?
  (The Doctor gives Clara a short round device.)
  DOCTOR: Er, you need to take this to the Tardis and put it in the charger slot for the sonic.
  CLARA: Why?
  DOCTOR: Hell. All hell, that's what happens if the Time Lords come back. There's half a universe up there already, waiting to open fire. Now please, go to the Tardis and just do as I say.
  (Clara runs.)

• E no final da série 9 "Hell Bent", vemos o material sonoro se materializar no slot do carregador antes de voar para a mão do Doctor:

                               

Ele é alimentado por " baterias " (também conhecido como " células de energia "). Ocasionalmente, estes ficam inoperantes e precisam ser recarregados.

_{^{Doctor Who Adventures #9 - Bizarre Zero}}

e

‘Is it just me,’ said Flowers, ‘or is the light getting fainter?’ She shook the sonic screwdriver, clamped tight in her clammy hand.
The Doctor rolled back on to his stomach. ‘Battery’s running down.

_{^{The Monsters Inside}}

e

_{^{"The Doctor keeps the tool on him for as long as power cells allow between recharges" - "Charging cells [depicted]"
Doctor Who: The Visual Dictionary}}