iFixit - Answers With Device "Marshall Headphone"

Marshall MID bluetooth Headphones: replacement battery for Marshall’s MID Bluetooth headphones?

Wed, 11 Dec 2019 12:16:42 -0700

So the battery on my Marshall MID Bluetooth headphones are no longer accepting a charge and it’s 5 weeks after the 1 year warranty.

Marshall has no replacement or repair policy.... just a thanks for your money and here is a coupon towards another pair of headphones that probably will die ....

Sooo I’m trying to track down a batter with 3 wires thats 3.7 V 680mah 2.52Wh abd ive found a bunch ... but with only two wires .

Can I mod these replacement batteries at all ?

I know there must be a way to create something work just like this apparently proprietary battery .

Thanks in advance for any help or direction !

Original Battery (3 wires)

⟐ Commented December 11, 2019 at 12:16 MST

Marshall MID bluetooth Headphones: Battery replacement? (Soldering, series of questions, detailed)

Sat, 09 Dec 2023 06:34:00 -0700

So my Marshall Mid Bluetooth headset stopped working abruptly today. It turns off immediately and will not charge. I’m assuming this means the battery has kicked the bucket.

I’m trying to see if it’s possible to replace the battery, but unfortunately there is almost nothing on the subject. The only source I could find is replacement battery for Marshall’s MID Bluetooth headphones? which was unfortunately left dormant before the important questions could be answered.

Therefore, I’m making this thread in the hopes that I can get an answer to the question: "How can one replace the battery on a Marshall Mid (bluetooth)?”

As I have no experience with soldering, I have a number of sub-questions to this topic just to make 100% sure that I’ve covered all my bases. I apologize for my lack of knowledge, but I just like to be as careful as possible. Also, please feel free to explain everything as in-depth as possible, as if I’m a five year old.

THE BATTERY

Above is a picture of the battery of a Marshall Mid (bluetooth). From the thread I linked, I understand the importance of correct dimensions and voltage, along with how to find these. I’ve looked around on the web and found this:

'''Would this battery work with the Marshall Mid?'''

I read in the other thread that the three wires are “negative”, “positive”, and “ground”. I kind of understand “positive” and “negative” (as all batteries have these), but I have no idea what “ground” is, and all the battery in the link tells me is that it’s got a “thermistor” (which some Googling did not help me understand in regards to this question).

⟐ Commented December 09, 2023 at 6:34 MST

Marshall MID bluetooth Headphones: Is it possible to replace the leather on this device?

Wed, 11 Dec 2024 13:58:13 -0700

I’ve had these headphones for many years and have been extremely pleased with them. However, I left them unattended at school one day, and some jerk decided to rip off the leather from the headphone cushion and headband.

⟐ Answered December 11, 2024 at 13:58 MST

Marshall MID bluetooth Headphones: Headband Adjustment is Broken

Sun, 12 Dec 2021 12:33:17 -0700

How can I fix my headband adjustment so it clicks and doesn’t just slide?

⟐ Commented December 12, 2021 at 12:33 MST

Marshall MID bluetooth Headphones: Power button not working

Wed, 15 May 2019 07:48:02 -0700

My headphones are actually the Marshall Monitor Bluetooths, rather than the MIDs, but since there’s no Monitors in the list and the power button is the same design (at least from the outside) the solution is likely the same.

The power button doesn’t work. It stopped working when the headphones were unfolded but would work when the headphones were folded up. Now nothing. Often when moving the headphones around with the button pressed, the indicator LED would flash super fast, like it was shorting, but the headphones now don’t turn on.

Marshall Major II Bluetooth: What battery type is in Marshall Major 2 Bluetooth?

Thu, 20 Apr 2023 13:05:55 -0700

I’ve been using Marshall Major 2 Bluetooth for 22 months. Recently the headphone stopped charging — instead of blinking red light when plugged in, I see a very dim solid white light. I searched in forums and apparently several other people had the same problem. Somebody recommended (aside from the 12-month warranty) replacing the battery.

Is it okay to replace the non-working original battery with an average Lithium Polymer battery? It says somewhere that the original batteries are 680 mAh.

Hi @oldturkey03, so I have bought a LiPo battery, but turns out it’s without NTC. The original battery inside the headphone has NTC.

Can I just omit the NTC connection?

The connection inside the headphone:

The battery I bought:

⟐ Answered April 20, 2023 at 13:05 MST

Marshall MID bluetooth Headphones: How important is NTC for LiPo batteries?

Thu, 23 Dec 2021 07:39:48 -0700

I need to replace my Bluetooth headphone LiPo battery.

I have bought a LiPo battery, but turns out it’s without NTC. The original battery inside the headphone has NTC.

Can I just ignore the NTC connection?

The connection inside the headphone:

The battery I bought:

⟐ Commented December 23, 2021 at 7:39 MST

Marshall Major IV: Loose knob on Marshall Major IV

Mon, 11 Aug 2025 00:37:19 -0700

I have a query regarding my Major IV knob button – it's become a bit loose, making it challenging to turn the volume up/down or switch to the next/previous song. Has anyone experienced a similar issue or knows a reliable way to repair it?

⟐ Commented August 11, 2025 at 0:37 MST

Marshall Major IV: Can not turn it on

Mon, 01 Jul 2024 07:52:13 -0700

water went inside the headphones

⟐ Answered July 01, 2024 at 7:52 MST

Marshall MID bluetooth Headphones: Marshal Major II bluetooth battery is not charging

Sat, 30 Jan 2021 09:33:34 -0700

Recently the battery stopped charging ( no red indicator ) everything else is still working fine, but no charge. No red led, no dim white. One weird detail is that when I try to charge the headphone with bluetooth on, it shut down immediately ( some sort of power protection ? )

Here are the things i checked:

USB connector: I connected to 5v and measured 5V on the PCB => seems fine
fuse : I measured a very low resistance => seems fine
battery : i unsoldered and charged it with a separate Li-ion charger ( seems ok ). I then measured potentials and found ( GND:0V, NTC:0V, VCC:3.7(ish)V ). I also measured resistance between GNC and NTC and found around 10kohm.

I think the problem comes from NTC, but I’m not sure to understand who this works:

Am I supposed to measure 0.5*Vcc on NTC when the battery is disconnected ? And does it change when the battery is connected or charging ?
if NTC was malfunctioning, shouldn’t i measure a resistance of 0ohms of infinite resistance ?

Thanks !

⟐ Commented January 30, 2021 at 9:33 MST

Marshall MID bluetooth Headphones: one of the adjusting ears

Thu, 08 Nov 2018 14:58:33 -0700

one of the adjusting earcups is not adjusting at all is just sliding an scratching my headphones

Casque Marshall monitor: Marshall monitor 3 battery replacement

Tue, 29 Apr 2025 08:19:06 -0700

Hello, Did anybody checked Marshall monitor 3 battery replacement possibility (battery specifications)? I am asking because Marshall does not provide their battery and I don't want to toss away completely working headphones just because the battery is dead. I asked the Marshall support, but they will not provide replacement battery :/

⟐ Answer edited April 29, 2025 at 8:19 MST

Marshall Major IV: Replacement for knobs and board.

Thu, 30 Oct 2025 12:58:02 -0700

Hey everyone, I fell asleep using the headphones and when i woke up the knob was broken and it fell out of the headphone, i (unfortunatly didn't know any better) and tried super glueing it back together, then it didn't turn on anymore.

I oppened it, and saw the glue on the knob and on the board where it sits.
I the cable/tape conector is ok, is this works with the wire and it charges.

I'm just searching for the parts to replace it.
found the knob https://www.snapeda.com/parts/SKRHABE010...
but not the board

Any idea where i can find it ?

Marshall MID bluetooth Headphones: Adjustable slider broken on one side

Mon, 25 Aug 2025 01:36:58 -0700

Hi, on my Marshall MID (ANC) the adjustable slider for slize on one side has broken, it now doesn't "snap" to the positions and just slides freely.
Is there a way to repair it? I suspect I'd have to remove the leather cover from the top to get to it, but I couldn't find a guide on this.

Marshall Major IV: Marshall Major IV ear cup hinges replacement

Mon, 02 Jun 2025 10:33:03 -0700

The lower four plastic hinges on the ear cups that hold the metal wire have all cracked/fallen out entirely. Because of this, sometimes the wire will slip out of the joint hole.

I have not included my own image, but I've marked up an image to show what pieces I'm talking about.

Is there any way to replace/repair/fill in this hinge?

Marshall MID bluetooth Headphones: Why ANC is not working properly? how to fix it?

Mon, 10 Feb 2025 13:27:51 -0700

I am unable to use my ANC in Marshall MID ANC, so how can I fix it at home.
Also, what can be reasons of not working ANC?

Marshall Major IV: Power Issue – Marshall Major IV Not Turning On

Sun, 02 Feb 2025 14:25:51 -0700

Hello,

I am experiencing an issue with my Marshall Major IV headphones. When I plug them in to charge, the indicator light turns green after about a minute, which seems to indicate that the battery is fully charged. However, as soon as I unplug them, the headphones do not turn on at all.

I have already tried several troubleshooting steps:

Using different USB-C cables and power adapters
Leaving the headphones charging for several hours
Attempting a forced restart by holding the power button for 15 seconds
Trying to turn them on while they are plugged in
Testing them in wired mode with a 3.5mm jack cable (which works)

Despite these attempts, the headphones refuse to turn on and only function in wired mode. Thank you in advance for your assistance.

Marshall Major IV: Headphones have buzzing or hissing sound while turned on

Tue, 24 Dec 2024 21:35:08 -0700

The right side of my headphones keeps on having subtle hissing or buzzing sound while playing songs or not even having anything on its really distracting. How do you fix it??

Marshall Headphone: Left earcup didn't get any sound when using bluetooth mode

Tue, 11 Jun 2024 02:41:22 -0700

Hi, I own a Marshall Monitor ii ANC. The problem with the headphone is, when using wireless mode, the sound produce at left earcup was delayed, then after few moment it will making buzz sound and then the sound was equal for both earcup, I suspected it has to do with the board or chip, all wire checking was intact. If using jack both working well with no issue. Is it possible to get the board replacement for it?

Marshall MID bluetooth Headphones: Marshal Major 4 - one speaker not working

Tue, 26 Sep 2023 14:34:23 -0700

I bought Marshal Major 4 and right from the box when I first time connected them the left speaker didn't work. I connected the aux cable and in this case, the speaker worked fine. However, it does not fix the problem with the Bluetooth connection. I tried to reboot the headphones so many times but it also doesn't help(