Lenovo IdeaPad U455 - Manual (Page 67)

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Chapter 6. Upgrading and replacing devices
Replacing the battery - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
To replace the battery, do the following:
1
Turn off the computer, or enter hibernation mode. Disconnect the AC
adapter and all cables from the computer.
2
Close the computer display, and turn the computer over.
Note: Use only the battery provided by Lenovo. Any other battery could ignite or
explode.