MacBook Pro battery drain while charging?

Discussion in 'MacBook Pro' started by Xscapes, May 12, 2012.

  1. Xscapes macrumors regular

    Oct 16, 2011
    New York
    I have my MacBook plugged to my thunderbolt display magsafe and use it as desktop very often. When I unplug it just now the battery shows only 87%. It usually 97 or 98% when i unplug it when i have it plugged for few days. Anyone else have this problem?
  2. Interstella5555 macrumors 603


    Jun 30, 2008
    It's possible to use more power than can be recharged, so your computer will "lose" power while charging.
  3. GuitarG20 macrumors 65816


    Jun 3, 2011
    Yes, if you exceed the wattage supplied by the charger (60W for 13", 85W for 15/17") then you will use all the power supplied by the charger and a little bit out of the battery. This should only happen during heavy system load though.

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