Unsupported Browser Detected: Dear user, the browser you’re currently using is not supported by this website. Please click here for more information about the browsers we support and how to obtain them.

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.

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