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Introduction

If your Marshall Major IV headphones are not holding a charge, dying quickly, or not turning on unless plugged in, the battery is likely faulty. The battery is attached to wires on whichever side of the headphones you are having trouble with. You will need to make sure that the headset is turned off during this procedure. You should also have spudgers and a screwdriver on hand for this. This guide will walk you through how to safely replace the internal battery.

What you need

Step 1 Battery

Marshall Major IV Battery Replacement, Battery: step 1, image 1 of 1

Twist the left earpad counter-clockwise to remove it.

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Step 2

Remove the protective seal on the driver assembly.

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Step 3

Remove all four of the 4 mm Phillips #1 screws securing the driver assembly.

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Step 4

Gently remove the driver assembly and set it beside the housing, with care not to strain the connected cables.

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Step 5

Unplug the white battery connector from the PCB.

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Step 6

Use an opening tool to gently pry up and remove the battery.

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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.