If your laptop unexpectedly goes into Sleep mode while you are using it but the battery charge is not low, you may need to recalibrate your battery. You should also recalibrate the battery periodically to maintain the accuracy of the battery gauge.

Follow these steps to recalibrate the battery.

  1. Connect your computer to AC power and let the battery charge completely.
  2. Disconnect the AC power and restart your computer.
  3. Completely discharge the battery.
  4. After the battery is completely drained, reconnect your computer to AC power.
  5. Charge the battery completely until the battery status indicator indicates that the charging has completed.