1120 Backup Battery - Lenovo ThinkPad W520 4284 Hardware Maintenance Manual

Table 25. Removal steps of BDC-3.0
Step Screw (quantity)
1
M2 × 3 mm, wafer-head, nylon-coated (1)
When installing: Make sure that the connector is attached firmly.

1120 Backup battery

For access, remove these FRUs in order:
• 1010 Battery pack
• 1030 DIMM slot cover
• 1060 Keyboard
• 1100 Keyboard bezel assembly
DANGER
Use only the battery specified in the parts list for your computer. Any other battery could ignite
or explode.
Torque
Color
Silver 0.181 Nm
(1.85 kgfcm)
.
Chapter 9 Removing and replacing a FRU
79