external harddrive or SDHC memory card battery consumption?

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

  1. jetlagged macrumors 6502

    Joined:
    Sep 6, 2012
    #1
    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).

    or

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

    any advice is appreciated.
     
  2. ApfelKuchen macrumors 68020

    Joined:
    Aug 28, 2012
    Location:
    Between the coasts
    #2
    The external HD will use much more battery power.
     

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