Battery discharges when system is unplugged and powered off - ThinkPad


  • The battery will lose capacity when left in a system without the AC power attached because the system will draw a small amount of current that will deplete the capacity over time. 
  • Batteries will lose some charge over time due to self discharge; this is normal.
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  • Document ID: HT077128
  • Last Updated :17 Jun 2014
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