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.

Did this work for you? let us know

  • Alias ID: MIGR-71222
  • Document ID: HT002982
  • Last Updated :17 Jun 2014
  • © 2015 Lenovo