Using The Extended Life Battery - Lenovo ThinkPad X41 Tablet Troubleshooting Manual

Replacing the battery
5. Align the front of a fully charged spare battery with the front side of the
battery space in the computer; then gently push the battery into the space.
6. Slide the battery lock to the lock position.
7. Turn the computer over again. Connect the ac adapter and the cables to
the computer.

Using the Extended Life Battery

You can attach a ThinkPad X40 Series Extended Life Battery to the docking
connector of your computer.
To attach an Extended Life Battery to 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.
2. Disconnect the ac adapter and all cables from the computer.
3. Close the computer display, and turn the computer over.
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ThinkPad X41 Tablet Service and Troubleshooting Guide