How to Replace a Dead or Failing Battery on the Sennheiser Momentum 4 Wireless Headphones (DIY Repair Guide)

Do your Sennheiser Momentum 4 headphones (model number: M4AEBT) refuse to power on, require frequent charging, or shut down before the battery reaches 1%? If playback time has decreased noticeably or the device shows a full charge but drains quickly, these are clear signs the battery may need replacement.

In this DIY repair guide, we show you how to replace a dead or dying battery in the Sennheiser Momentum 4 wireless headphones using OEM spare parts without technical skill or experience. You will find all the tools required for this repair and original replacement parts below.

Want to get your headphones repaired by a professional? Send us your Sennheiser Momentum 4 headphones and our repair ninjas will restore your device to peak working condition. Follow the link, select the issues you’re experiencing, and click See Estimated Total to view the repair cost instantly.

Repair Difficulty

Moderate / Requires 30-40 minutes to complete.

This repair involves the use of sharp instruments and careful handling of delicate internal components, including small screws, ribbon cables, connectors, and a battery. You don’t need advanced tools or technical skills to complete the repair. With the right tools, a bit of patience, and attention to detail, you can easily replace the battery at home.

Replacement Parts You’ll Need

Restore the battery life and audio playback time of your Sennheiser Momentum 4 headphones with original replacement parts. Select the OEM spares from the drop-down menu below and bring your device back to peak working condition.

• Sennheiser Momentum 4 Wireless Battery AHB413645PCT 700mAh OEM Original Replacement Parts

Get an OEM replacement battery for your Sennheiser Momentum 4 headphones today. Click the link to visit our store, then scroll down to the Customers Also Add section to purchase the original replacement part and the tools you’ll need for this repair at a discount.

Tools You’ll Need

Before starting the Sennheiser Momentum 4 battery replacement, gather the following tools. Using the correct tools will help you complete the repair successfully, without damaging delicate internal components, including cables, circuit boards, and connector ports. We used the following tools and recommend them for a safe and professional fix at home.

• 1.5mm Phillips Screwdriver
• 1.5mm Flathead Screwdriver
• Nylon Spudger
• Precision Tweezers
• Strong Metal Pry Tool
• Heat-Proof Anti-Static Rubber Work Mat

Not ready to invest in tools yet? Find your device in our repair catalog, select the issues it’s experiencing, and send it to us. Our repair ninjas will restore your device to peak working condition.

Step-by-Step DIY Guide to Replacing the Battery on the Sennheiser Momentum 4 Wireless Headphones at Home

In this detailed DIY repair guide, we show you how to replace the battery on the Sennheiser Momentum 4 headphones at home. Follow each step carefully and use the accompanying images as a visual guide to complete the repair with confidence.

Step 1: Disassemble the Left Earcup

1.1. The battery in the Sennheiser Momentum 4 is in the left earcup housing. Insert a strong metal pry tool into the seam between the earpad cushion and earcup housing and work the tool till the cushion and housing separate.

1.2. Unfasten and store the 4 screws securing the speaker housing to the earcup.

1.3. Gently lift the speaker housing off the earcup, then disconnect the internal Microphone Sensor (MS) and the battery ribbons with a nylon spudger.

Step 2: Remove the Dead or Dying Battery

2.1. Remove the adhesive from the wire with a nylon spudger to improve accessibility.

2.2. Pry up the battery cover with a nylon spudger to reveal the dead battery.

2.3. Extract the battery from the housing with a nylon spudger. It is held on by double-sided tape.

Step 3: Install a New Battery

3.1. Peel the cover off the double-sided tape, then align the battery with the housing and press it down so that the adhesive bonds with the surface.

3.2. Install the battery cover by pushing it down till the clips click into place.

Step 4: Reassemble the Sennheiser Momentum 4 Headphones

4.1. Align the speaker housing with the earcup and tuck the internal wires with precision tweezers so that they are not pinched during reassembly.

4.2. Connect the MS and battery cables.

4.3. Secure the speaker housing with the earcup with 4 screws.

4.4. Align the grooves on the earpad cushion with those on the earcup and press them together till you hear them click into place.

Congratulations! Your Sennheiser Momentum 4 Wireless Headphones are Ready to Use

You have successfully replaced the battery on the Sennheiser Momentum 4 wireless Bluetooth headphones. Check the charging stability, audio quality, buttons, and Bluetooth pairing to confirm the device is working properly.

If you found this guide helpful and would like to try your hand at DIY gadget repair, visit our store for essential tools and spare parts. You can also check out our at-home DIY headphones repair guides for other popular brands, including Apple, Beats, Bose, Sennheiser, and Sony.

Have questions or suggestions about this repair? Text a repair ninja or email us, and we’ll reply shortly.