Lenovo B5400 Notebook - Manual (Page 37)

Appendix A. CRU instructions
31
5 Unplug the backup battery connector, and then remove the backup
battery .
6 Install a new backup battery. Insert the backup battery connection firmly.
7 Reinstall the computer cover, and then reinstall the screws.
8 Reinstall the battery. For details, see “Replacing the battery pack” on
page 28.
9 Turn the computer over again. Reconnect the AC power adapter and all
cables.
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