Remove The Cmos Battery - Lenovo 82RB Hardware Maintenance Manual

Figure 19. Detach the thermal module cable connectors and remove four screws
Screw specifications
M2 x L4.5
M2.5 x L7
Step 2. Loosen six screws and then remove the thermal module.
Figure 20. Loosen six screws and remove the thermal module
Go to https://support.lenovo.com/partslookup
part:
Thermal module

Remove the CMOS battery

Make sure the following FRUs (or CRUs) have been removed.
"Remove the lower case" on page 30
"Remove the solid-state drive (SSD) plate (L)" on page 31
"Remove the solid-state drive (SSD) plate (R)" on page 32
"Remove the thermal module" on page 39
40
Hardware Maintenance Manual
Number of screws
2
2
to look up the Lenovo part number of the following replacement