external harddrive or SDHC memory card battery consumption?

Discussion in 'MacBook Air' started by jetlagged, Aug 6, 2016.

  1. jetlagged macrumors 6502

    Sep 6, 2012
    I have a macbook air 13" 2012. battery life is not what it used to be. it's telling me to serviced my battery. its only up to 67% of the original capacity and I can only watch a movie on medium brightness for 2 hours and 30 minutes. i like to watch 1 movie when I fly in an airplane. of course i want to conserve as much battery life as possible during the flight to finish the movie, but i am running out of computer memory space.

    i'm thinking of moving the movie files to an external hd or sdhc card. i own a small external harddrive, seagate passport. will the battery drain faster if my computer is connected to the external hard drive when watching a movie? (i dont have much space in my mba).


    am i better off transferring the movie files to an SDHC memory card?

    any advice is appreciated.
  2. ApfelKuchen macrumors 68030

    Aug 28, 2012
    Between the coasts
    The external HD will use much more battery power.

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