Remove The Cmos Battery - Lenovo 16ACH6H Hardware Maintenance Manual

Figure 20. Open the buckles and then remove the memory
Go to
https://support.lenovo.com/partslookup
replacement parts:
Memory shielding
Memory

Remove the CMOS battery

Make sure the following FRU (or CRU) has been removed.
"Remove the lower case" on page 30
Step 1. Disconnect the battery pack cable from the system board.
Attention: Use your fingernail to pull the connector to unplug it. Do not pull the cable.
Step 2. Remove the left SSD plate.
Note: For details, see "Remove the solid-state drive (SSD) plate" on page 33.
Step 3. Remove the left SSD.
Note: For details, see "Remove the solid-state drive (SSD)" on page 34.
Step 4. Disconnect the CMOS battery cable from the system board and then remove the CMOS battery.
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Hardware Maintenance Manual
to look up the Lenovo part numbers of the following