Lenovo ThinkPad X41 Tablet Troubleshooting Manual page 62

Using the Extended Life Battery
7. Slide the latch as the arrow shows.
8. Turn the computer over again. Connect the ac adapter and the cables to
the computer.
To remove the battery from the computer, do the following:
1. Check the state of the main battery. If it is not attached, or if it is attached
and is almost discharged, turn off your computer, or enter hibernation
mode. If the main battery is attached and has enough power, enter
standby mode.
Note: If the main battery is attached, but is almost discharged when you
2. Disconnect the ac adapter and all cables from the computer.
3. Close the computer display, and turn the computer over.
4. Slide the latch as shown.
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ThinkPad X41 Tablet Service and Troubleshooting Guide
remove the Extended Life Battery from the computer in standby
mode, your computer may shut down.