Remove The Battery Pack - Lenovo IdeaPad Flex 3 Chromebook Hardware Maintenance Manual

Screw specifications
M2 x L2.5
Go to https://support.lenovo.com/partslookup
replacement part:
Lower case

Remove the battery pack

Make sure the following FRUs (or CRUs) have been removed.
"Remove the lower case" on page 30
Step 1. Disconnect the cable from the system board.
Attention: Use your fingernail to pull the connector to unplug it. Do not pull the cable.
Figure 4. Disconnect the battery pack cable
Number of screws
9
to look up the Lenovo part numbers of the following
.
Chapter 5 Removing a FRU or CRU
31