Testing the Backup Battery (8543)



Testing the Backup Battery
  1.  Remove the keyboard and the top cover.
  2.  Measure the voltage at the connectors of the backup battery.

 

Pin Voltage (Vdc)
1 +2.8 to +3.2
2 Ground

If the voltage is not correct, the backup battery is discharged by a short circuit or is defective.

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