Getac S410 G4 SP3DTA34SDXI User Manual page 57

After removing the battery pack, do not connect and immediately

disconnect the AC adapter. This will shut down the computer
About the Bridge Battery
For models having the bridge battery:
The bridge battery is not user-replaceable and is invisible to the

operating system. It never functions as the power source as long as the
battery pack is installed.
The bridge battery is charged by external AC power if the AC adapter is

connected.
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