USB-C power banks and MB

Discussion in 'MacBook' started by thisMRguy, Apr 24, 2016.

  1. thisMRguy macrumors member

    Jan 9, 2013
    Been thinking about the charging characteristics of USB-C and how phones and MB work from them. From research thus far, phones can charge from the MB 29w wall charger.

    -Can the MB charge from a USB-C power bank, rated at 10,000mAh/12w/2.1A ?
    -Can the MB charge from an ipad wall charger or power bank with USB2 -> USB-C cable?

    ...I presume both methods will be slow at 12W if it chargers at all.

    Starting to see the advantages of one connector, pity about there only being one port and not two.
  2. keviig macrumors 6502

    Jun 7, 2012
  3. KrisLord macrumors 65816

    Sep 12, 2008
    Northumberland, UK
    Charging with things designed for iPads (ie 5v 2A 10-12w) is only borderline possible. If the MacBook is on it's likely to only be sufficient to maintain existing charge rather than actually increase the charge on your macbook. If the MacBook is off, it still takes an age.
  4. keviig macrumors 6502

    Jun 7, 2012
    Yeah, 12w is sufficient to slowly increase charge under light/normal usage, and will also do just fine for charging overnight. The Macbook has a 41WHr battery, and theoretically it would take 3,5 hours to charge with a 12w charger (41/12=3,41) but the last 20% charges slower, so I'd recon you'll get a full charge without using it in 4-5 hours.

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