After the dell laptop battery light turns off, which indicates that the battery pack is fully charged, begin discharging the battery pack.
- Select the Power Meter icon on the taskbar, or select Start > Control   Panel > Performance and Maintenance > Power Options > Power Schemes.   
 
- Write down the 3 settings in the Plugged In column and the   
 
- settings in the Running on Batteries column, so you can reset them after   calibration.   
 
- Select the drop-down lists and set all 6 options in both columns to Never.   
 
- Select the OK button.   
 
- Disconnect the notebook from the external power source, but do not turn off   the notebook.  
To fully discharge the dell Inspiron E1505 battery pack:
 
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