Lenovo 20AA000955, Hardware Maintenance Manual

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1080 Built-in battery
DANGER
Use only the authorized battery specified for the computer. Any other battery could ignite or
explode.
Important notice for replacing a battery
Attention:
Lenovo has no responsibility for the performance or safety of unauthorized batteries, and provides no
warranties for failures or damage arising out of their use.
The Lenovo Vantage program provides an automatic battery diagnostic test that determines if the battery is defective.
A battery FRU should not be replaced unless this diagnostic test shows that the battery is defective. The only
exception to this is if the battery is physically damaged or a customer is reporting a possible safety issue. Note that a
physically damaged battery is a non-warranty replacement part.
For access, remove this FRU:
• “1020 Base cover assembly” on page 72
Removal steps
ThinkPad T490s
Step Screw (quantity) Color Torque
2
M2 × 4.5 mm, flat-head, nylon-coated (5) Black 0.181 Nm
(1.85 kgf-cm)
Chapter 8
.
Removing or replacing a FRU
79