Checking the Standby Battery

Checking the Standby Battery

  Be careful not to cause a short circuit when measuring the voltage.
  1.  Power-off the computer and unplug the AC Adapter  from the computer.
  2.  Remove the standby battery.
  3.  Measure the voltage of the standby battery.

  4.  Plug the AC Adapter  into the computer and power-on the computer.
  5.  Measure the output voltage at the connector on the system board.


    Pin Voltage (Vdc)
    + +4.0
    - Ground


  6.  Ensure that the AC Adapter is plugged into  the computer, then power-on the computer.
  7.  Charging of the standby battery starts.  A depleted battery needs approximately 30  minutes to be recharged to the operational voltage of +3.5 Vdc.
  8.  Unplug the AC Adapter.
  9.  Verify the standby battery function by removing and installing  the battery pack during suspend mode.

NOTE: Removing and installing the battery pack during suspend mode should be done within one minute.

The resume operation must start. If the resume operation does not work, switching of power from the battery pack to standby battery will not be correct. Replace the system board.

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