Lenovo ThinkPad T530i User Manual page 117

5. Turn the computer over again. Connect the ac power adapter and the cables to the computer.
To remove the extended life battery, do the following:
1. Turn off the computer, or enter hibernation mode. Then disconnect the ac power adapter and all cables
from the computer.
2. Close the computer display, and turn the computer over.
3. Unlock the battery latch.
4. Press the latch as shown in the illustration below and detach the battery.
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Chapter 7 Enhancing your computer