Battery not recognized does not charge or does not reach capacity

  1. Plug in the power cord for five minutes to revive a drained battery. Refer to Knowledge Base article 304301: "MacBook and MacBook Pro: Battery not recognized after being fully drained."
  2. To properly evaluate the battery, follow the steps in Knowledge Base article 500644: "Portable Computer Battery Screening Process."
  3. If the computer is on Mac OS X 10.4.8 or later, check to see if the latest Battery Update has been installed. Do not replace a battery unless Battery Update 1.2 (or later) has been installed. For complete instructions, refer to Knowledge Base article 305256 About Battery Update 1.2.
  4. For retail or dispatch service providers only: Be sure to record the Full Charge Capacity (FCC) and Cycle Count values in your case notes. If the computer is on Mac OS X 10.4 or later, these values can be found in Apple System Profiler: Hardware: Power: Battery Information.

Also see 305364: MacBook, MacBook Pro: Battery not recognized or "X" icon appears on menu bar.

(The "X" icon appears on computers running operating systems prior to Mac OS X 10.5.)

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