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      ThinkPad CPU Clock Speed is lowered when battery is detached - ThinkPad


      System CPU Clock speed is lowered while when battery is detached from the system.


      Affected Configurations

      The following ThinkPad systems maybe affected by this symptom:

      • Edge 13, Edge E30, Edge E120, Edge E320
      • L42, L520
      • R60, R60e, R61, R61e
      • R400, R500
      • T60, T60p, T61, T61p
      • T400, T500
      • T410, T410i, T410s, T410si, T510, T510i
      • T420, T420i, T420s, T420si, T520, T520i
      • W500, W510, W520, W700, W700ds, W701, W701ds
      • X1
      • X61, X61s, X61 Tablet
      • X121e
      • X200, X200s, X200 Tablet
      • X201, X201i, X201s, X201 Tablet
      • X220, X220i, X220 Tablet, X300, X301



      Condition may occur when system battery is removed and powered with a 65 watt AC adapter that the CPU clock is lowered to prevent accidental shutdown. If maximum frequency operation is preferred in such situations, a 90W AC adapter should be used.


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      • Alias ID: MIGR-71222
      • Document ID: HT002982
      • Last Updated :17 Jun 2014
      • © 2016 Lenovo