Laptop Service and Troubleshooting Guide

4. Align the side of a fully charged spare battery with the side of the battery
space in the computer 1; then gently push the battery into the space 2.
5. Slide the battery latch to lock it.
6. Turn the computer over again. Connect the ac adapter and the cables to
the computer.
Replacing the battery
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ThinkPad
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G40 Series Service and Troubleshooting Guide