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LG V40 ThinQ Battery Replacement

Introduction

If your LG V40 ThinQ’s battery cannot hold a charge, drains quickly, will not power on, or is degraded, use this guide to replace it. This can help restore device performance.

Follow each step closely and make sure to power off your device before starting and disconnecting from any external power source.

What you need

  1. LG V40 ThinQ Battery Replacement, Back Cover: step 1, image 1 of 2 LG V40 ThinQ Battery Replacement, Back Cover: step 1, image 2 of 2

    • Use an iOpener or hairdryer to heat the adhesive on the back cover by rolling it up and down the back of the phone.

    • You will know when the back is hot enough when an Opening pick is able to slide under the back cover.

    Edit

  2. LG V40 ThinQ Battery Replacement: step 2, image 1 of 3 LG V40 ThinQ Battery Replacement: step 2, image 2 of 3 LG V40 ThinQ Battery Replacement: step 2, image 3 of 3

    • Use opening to pry the back cover away from the adhesive.

    • This can take some time. Be patient and go slowly.

    • We recommend you move slowly and carefully to not crack the back glass.

    Edit

  3. LG V40 ThinQ Battery Replacement: step 3, image 1 of 2 LG V40 ThinQ Battery Replacement: step 3, image 2 of 2

    • Carefully disconnect the fingerprint sensor from the back camera lens cover.

    Edit

  5. LG V40 ThinQ Battery Replacement: step 4, image 1 of 3 LG V40 ThinQ Battery Replacement: step 4, image 2 of 3 LG V40 ThinQ Battery Replacement: step 4, image 3 of 3

    • Use the opening picks again to gently remove the back camera lens cover and fingerprint sensor off from the back cover.

    • Set the fingerprint sensor and camera cover aside. You will need the fingerprint sensor to put into any new back cover bought for the phone.

    Edit

  6. LG V40 ThinQ Battery Replacement: step 5, image 1 of 2 LG V40 ThinQ Battery Replacement: step 5, image 2 of 2

    • Clean the back cover of any old adhesive by gently heating the area with the iOpener to soften the adhesive.

    • Use a cloth or cotton swab soaked in isopropyl alcohol to gently rub and dissolve the glue.

    Edit

  7. LG V40 ThinQ Battery Replacement: step 6, image 1 of 1

    • Apply new adhesive on the back cover in the places where the old adhesive was applied.

    Edit

  8. LG V40 ThinQ Battery Replacement, Battery: step 7, image 1 of 2 LG V40 ThinQ Battery Replacement, Battery: step 7, image 2 of 2

    • Remove the fourteen 15 mm-long Phillips #000 screws holding down the wireless charging coil and loudspeaker module.

    Edit

  9. LG V40 ThinQ Battery Replacement: step 8, image 1 of 2 LG V40 ThinQ Battery Replacement: step 8, image 2 of 2

    • Disconnect the battery press connector.

    Edit

  10. LG V40 ThinQ Battery Replacement: step 9, image 1 of 2 LG V40 ThinQ Battery Replacement: step 9, image 2 of 2

    • With the opening picks, very gently insert and pry the battery slowly until it comes free from the adhesive and remove it.

    • This can take some time to safely remove the battery without damaging it. Be careful not to rip the battery from the adhesive holding it down.

    Edit
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.

One other person completed this guide.

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Noah

Member since: 09/12/25

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University of North Texas, Team 7-5, Kilpatrick Fall 2025 Member of University of North Texas, Team 7-5, Kilpatrick Fall 2025

UNT-KILPATRICK-F25S7G5

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