Lenovo ThinkPad T420si Hardware Maintenance Manual - Page 75

Serial Ultrabay Slim device or travel bezel

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The Lenovo ThinkVantage Toolbox and Lenovo Solution Center (in Windows 7) have an automatic battery diagnostic that determines if the battery pack is defective. A battery pack FRU should not be replaced unless this diagnostic shows that the battery is defective. The only exception to this is if the battery pack is physically damaged or a customer is reporting a possible safety issue. If Lenovo ThinkVantage Toolbox is not installed in the computer, the customer should download this program before a non-physically damaged battery pack is replaced. Note that the replacement of a physically damaged battery pack is not covered by the warranty. Table 9. Removal steps of battery pack DANGER Use only the battery specified in the parts list for your computer. Any other battery could ignite or explode. Unlock the battery latch 1 . Holding the battery latch in the unlocked position 2 , remove the battery pack in the direction shown by arrows 3 and 4 . 1 2 3 4 3 When installing: Install the battery pack in the slot. Make sure that the battery latch is in the locked position. 1020 Serial Ultrabay Slim device or travel bezel For access, remove this FRU: • "1010 Battery pack" on page 68 Chapter 8. Removing and replacing a FRU 69

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The Lenovo ThinkVantage Toolbox and Lenovo Solution Center (in Windows 7) have an automatic battery
diagnostic that determines if the battery pack is defective. A battery pack FRU should not be replaced unless
this diagnostic shows that the battery is defective.
The only exception to this is if the battery pack is physically damaged or a customer is reporting a possible
safety issue.
If Lenovo ThinkVantage Toolbox is not installed in the computer, the customer should download this program
before a non-physically damaged battery pack is replaced. Note that the replacement of a physically
damaged battery pack is not covered by the warranty.
Table 9. Removal steps of battery pack
DANGER
Use only the battery specified in the parts list for your computer. Any other battery could ignite or explode.
Unlock the battery latch
1
. Holding the battery latch in the unlocked position
2
, remove the battery pack in
the direction shown by arrows
3
and
4
.
When installing:
Install the battery pack in the slot. Make sure that the battery latch is in the locked position.
1020 Serial Ultrabay Slim device or travel bezel
For access, remove this FRU:
•
“1010 Battery pack” on page 68
Chapter 8
.
Removing and replacing a FRU
69