1

May I know which one is grammatical?

the battery power is limited on mobile devices

the battery powers are limited on mobile devices

5

Power is uncountable, so it's the first one.

the battery power is limited on mobile devices

  • 3
    Rather, "power" is uncountable when it means "energy". Consider: "her superhero powers included unaided flight and mind-reading" :) – Kreiri Sep 24 '14 at 9:42
  • I actually thought about that. Decided that batteries should not have superpowers. Most inanimate objects just don't have the required responsibilities. – StorymasterQ Sep 24 '14 at 13:27
  • The battery is dead. Before it died, was it animate? The powers that be are undecided. – user6951 Sep 24 '14 at 19:28

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