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Introduction

This guide provides essential steps for troubleshooting and replacing your laptop battery. If you’re encountering power issues or reduced battery life, you’ll find practical solutions to help you identify and resolve these problems.

Laptop batteries are crucial for providing portable power, but they can degrade over time due to charging cycles, heat, and age. To maintain battery health, regularly calibrate, avoid extreme temperatures, and manage charging habits. Proper care can extend your battery's lifespan and ensure reliable performance on the go.

What you need

Step 1 Base Plate

Lenovo ThinkPad T490 Battery Replacement, Base Plate: step 1, image 1 of 1

Loosen the screws from the base plate.
Using a Philips #1 screwdriver fully loosen the six screws on the back cover.
These screws are captive - they will not fully come out after being unscrewed.

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Step 2

Insert the iFixit opening tool into the space between the base plate and the chassis.
Glide the tool along the perimeter of the case in order to release the clips holding the case and chassis together.

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Step 3

Grab the edge of the cover and lift the cover away from you.
There may be additional clips holding the cover in place. These remaining clips will release easily as you remove the cover.

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Step 4 Battery

Lenovo ThinkPad T490 Battery Replacement, Battery: step 4, image 1 of 3

Lenovo ThinkPad T490 Battery Replacement, Battery: step 4, image 2 of 3

Lenovo ThinkPad T490 Battery Replacement, Battery: step 4, image 3 of 3

Remove the four 3 mm screws securing the battery with a Phillips #00 screwdriver.

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Step 5

Use tweezers or your fingernails to disconnect the battery from its motherboard socket.

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Step 6

Lift up and remove the battery from the device.

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Conclusion

To reassemble your device, follow the above steps in reverse order.
For optimal performance, after completing this guide, calibrate your newly installed battery.
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Try some basic troubleshooting or ask our Answers community for help.