If you don't have ELECTRICITY,
then you probably don't need cable.
The Big Bang Theory Season 2, Episode 14
And he didn't think that it was fair
for people to pay for ELECTRICITY...
The Big Bang Theory Season 8, Episode 23
He merely used a kite to determine
that lightning consists of ELECTRICITY.
The Big Bang Theory Season 3, Episode 6
Same reason
it's got ELECTRICITY:
The Big Bang Theory Season 12, Episode 7
Going out to discover ELECTRICITY?
The Big Bang Theory Season 3, Episode 6