Checking the Backup Battery (2640)

Checking the Backup Battery
  1.  Power-off the computer and unplug the AC Adapter  from the computer.
  2.  Turn the computer upside down
  3.  Remove the DIMM cover and backup battery (see 'Backup Battery'
  4.  Measure the voltage of the backup battery.

NOTE: Be careful not to measure the wrong side of the backup battery.


Wire Voltage (Vdc)
Red +2.5 to +3.7
Black Ground

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