Battery drain with USB modem

Discussion in 'MacBook Air' started by nick42983, Sep 27, 2013.

  1. nick42983 macrumors 6502


    May 18, 2009
    I have a Macbook Air (Haswell, i7, 8GB). I've spent the past month in Poland and while in my apartment I've been using a USB modem (Huawei) to connect to the Play 3G network in Warsaw. When using the modem my battery life on a full charge drops to about 8 hours, while when I'm in a coffee shop on wifi or just at home without the modem on, it goes back up to 14-15 hours.

    Does a USB modem really drain close to 50% more battery? Next time I'll plan to get a wifi modem, since charging my laptop every day gets to be annoying, when I bought it for its battery life.
  2. teffers macrumors regular

    Jun 23, 2013
    United Kingdom
    Not sure about USB modems draining the battery (although I'd expect they may well do) but I know the wattage being used on my MBA 2013 just about doubles when I'm using the Thunderbolt GIGABIT connector for internet (mine says about 8-9 hours on a full charge).

    The 12 hours + is pretty much perfect scenerio: wifi web browsing so anything other than that is gonna negatively impact the hours.

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