Introduction

Use this guide to replace the battery in your HTC One M8.

Please note that your device may have a large amount of copper shielding and tape covering the back of the display assembly, as shown here. If this is the case, you'll need to gently remove it to get at the motherboard.

  1. Insert a SIM card eject tool or a paperclip into the small hole in the SIM card tray, located on the upper left hand side of the phone. Press to eject the tray.
    • Insert a SIM card eject tool or a paperclip into the small hole in the SIM card tray, located on the upper left hand side of the phone.

    • Press to eject the tray.

    • This may require a significant amount of force.

  2. Remove the SIM card tray assembly from the HTC One M8.
    • Remove the SIM card tray assembly from the HTC One M8.

    • When reinserting the SIM card, ensure that it is in the proper orientation relative to the tray.

  3. Insert a SIM card eject tool or a paperclip into the small hole in the microSD card tray, located on the upper right hand side of the phone. Press to eject the tray.
    • Insert a SIM card eject tool or a paperclip into the small hole in the microSD card tray, located on the upper right hand side of the phone.

    • Press to eject the tray.

    • This may require a significant amount of force.

  4. Remove the microSD card tray assembly from the HTC One M8.
    • Remove the microSD card tray assembly from the HTC One M8.

    • When reinserting the microSD card, ensure that it is in the proper orientation relative to the tray.

  5. Use an iOpener or heat gun to loosen the adhesive on the upper and lower speaker grilles. Refer to the iOpener guide for info on how to use the iOpener.
    • Use an iOpener or heat gun to loosen the adhesive on the upper and lower speaker grilles.

  6. Free shipping on all orders over $100 or containing a Pro Tech Toolkit!

    Browse Our Store

    Ever fixed something? That’s Genius.

    Share your repair story with #ImAGenius

    We Are All Geniuses

    Share your repair story with #ImAGenius

  7. Use a plastic opening tool to gently peel up the lower speaker grille. The adhesive is messy, and can be removed using Goo-gone. The adhesive is messy, and can be removed using Goo-gone.
    • Use a plastic opening tool to gently peel up the lower speaker grille.

    • The adhesive is messy, and can be removed using Goo-gone.

  8. Use a plastic opening tool to gently peel up the upper speaker grille. Use a plastic opening tool to gently peel up the upper speaker grille.
    • Use a plastic opening tool to gently peel up the upper speaker grille.

  9. Remove the two silver 3 mm Phillips #00 screws from the top.
    • Remove the two silver 3 mm Phillips #00 screws from the top.

    • Remove the four black 4 mm T5 Torx screws from the bottom.

  10. Work your way around the perimeter of the phone with a spudger and plastic opening picks to free the clips that secure the rear case to the display assembly. A metal spudger is pictured, but it is best to use a nylon spudger to prevent marring the device. Be careful not to lose the power button: it sits loosely in the top of the lower chassis.
    • Work your way around the perimeter of the phone with a spudger and plastic opening picks to free the clips that secure the rear case to the display assembly.

      • A metal spudger is pictured, but it is best to use a nylon spudger to prevent marring the device.

      • Be careful not to lose the power button: it sits loosely in the top of the lower chassis.

    • Significant force may be required to pry the casing apart.

  11. Remove the two silver 2 mm Phillips #00 screws securing the battery connector to the motherboard. Use a plastic opening tool to gently pry up the battery connector.
    • Remove the two silver 2 mm Phillips #00 screws securing the battery connector to the motherboard.

    • Use a plastic opening tool to gently pry up the battery connector.

  12. Use a spudger to disconnect the two (four) antenna cables. Use the tip of a spudger to disconnect the seven ZIF connectors. Use a pair of tweezers to gently pull the seven ribbon cables free of the connectors.
    • Use a spudger to disconnect the two (four) antenna cables.

    • Use the tip of a spudger to disconnect the seven ZIF connectors.

    • Use a pair of tweezers to gently pull the seven ribbon cables free of the connectors.

  13. Remove three silver 3mm screws using T5 screwdriver.
    • Remove three silver 3mm screws using T5 screwdriver.

  14. Use an iOpener or a heat gun to loosen up the adhesive securing the motherboard to the display assembly. Use a plastic opening tool to gently pry the motherboard free of the display assembly. At this point, the bottom speaker is still attached to the motherboard. If you are only replacing the motherboard, refer to the bottom speaker guide to swap your existing speaker to the new motherboard.
    • Use an iOpener or a heat gun to loosen up the adhesive securing the motherboard to the display assembly.

    • Use a plastic opening tool to gently pry the motherboard free of the display assembly.

    • At this point, the bottom speaker is still attached to the motherboard. If you are only replacing the motherboard, refer to the bottom speaker guide to swap your existing speaker to the new motherboard.

  15. Gently bend the various ribbon cables out of the way of the battery. Use an iOpener or heat gun to loosen up the adhesive securing the battery to the display assembly. Use a plastic opening tool to gently pry up the battery from the display assembly.
    • Gently bend the various ribbon cables out of the way of the battery.

    • Use an iOpener or heat gun to loosen up the adhesive securing the battery to the display assembly.

    • Use a plastic opening tool to gently pry up the battery from the display assembly.

Conclusion

To reassemble your device, follow these instructions in reverse order.

108 other people completed this guide.

Mitchell Keller

Member since: 04/14/2015

1,530 Reputation

1 Guide authored

Team

Cal Poly, Team 5-9, Maness Spring 2015 Member of Cal Poly, Team 5-9, Maness Spring 2015

CPSU-MANESS-S15S5G9

4 Members

18 Guides authored

30 Comments

thanks for the instructions. i dropped my m8 and the power button wasnt responding at all and volume down wasnt either . i dissassembled the phone ( maybe i shouldnt have used my swiss army blade, left dents in plastic) using this guide..and pushed all the connectors into firmly and it worked again . thanks a bunch

drocheit - Reply

Do we need to replace the adhesive when replacing the battery?

iarinaga - Reply

I did not replace the adhesive: there's enough left to keep everything secure

Karl Horton -

zoccola zoccola

giovanni antise - Reply

Hi, if there is a lot of tape is it necessary to replace it with new tape and copper shielding, and where can you get it please ?

Toby Murcott - Reply

View Statistics:

Past 24 Hours: 44

Past 7 Days: 335

Past 30 Days: 1,671

All Time: 124,998