How to choose an external battery?

Discussion in 'MacBook Pro' started by fessen, Aug 8, 2016.

  1. fessen macrumors member

    May 4, 2011
    I am looking for a backup battery (or batteries) to keep a MBP running when utility line power is unavailable.

    Anyone know of good posts/threads here or elsewhere covering the major considerations for making a purchase? For example, how to estimate how long a given battery, based on its advertised specs, should be able to keep a laptop powered, or how many times it should be able to recharge a laptop's internal battery (if that's even possible) on a single charge of the external battery.

    (Yes, I know how to use search engines. Hoping for some suggestions from people who have already weeded through the useless stuff and have found worthwhile sources.)
  2. Johbremat macrumors regular

    Feb 8, 2011
    HyperJuice are the only one I'm aware of.

    Been considering the 100WH v2 model for some time now, but the need for the Magic Box is a pain.

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