17The battery pack has a function for measuring, storing and learning about battery ca-pacity. Using this function properly to accurately display remaining battery capacity re-quires that the battery pack be fully charged (charged to 100%), then fully discharged,and then fully charged again.This procedure should be performed once after you purchase the computer. As you usethe battery pack over a long period of time, the remaining capacity display may becomeinaccurate due to aging of the battery pack and other factors. The procedure describedbelow should be repeated.1 Power off your computer ( “Starting Up/Shutting Down”)Do not shut down using the standby or hibernation mode.2 Connect your computer to the optional port replicator, externaldisplay and external keyboard.( Operating Instructions of the port replicator, page 23)3 Attach the battery pack and connect the AC adaptorRemove all unnecessary peripherals.4 Once the battery indicator turns green, turn on the computer,then use the “Refresh Battery” utility to fully discharge the bat-tery pack1 Run the Setup Utility. ( page 29)2 Select [Refresh Battery] from the [Main] menu and press Enter .3 At the confirmation message, select [Yes] and press Enter .The battery pack will be completely discharged, the computer will power off au-tomatically, and then charging will commence. It takes approximately 1.5 hours(when one battery is set) or 3 hours (when two batteries are set) until the powerautomatically goes off through the complete discharge of the battery from thefully charged state.5 Allow the battery pack to charge until the battery indicator turnsgreenThe battery will not be refreshed correctly in the following cases.When the power of the computer is cut.When the electric power becomes disconnected (e.g., electrical outage, ac-cidental removal of the AC adaptor, etc.).Accurately Displaying Battery CapacityNOTEBattery Power