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Introduction

This is the Battery Replacement guide for the Sennheiser HD 350BT this guide was specifically made if your having any trouble with any of the regarding Depleted batteries, Corrosion present or if the present battery has faulty cells.

What you need

Step 1 Battery

Sennheiser HD 350BT Battery Replacement, Battery: step 1, image 1 of 3

Sennheiser HD 350BT Battery Replacement, Battery: step 1, image 2 of 3

Sennheiser HD 350BT Battery Replacement, Battery: step 1, image 3 of 3

Remove the left ear pad.

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Step 2

Remove the four 8.6 mm Phillips screws securing the left driver housing.

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Step 3

Sennheiser HD 350BT Battery Replacement: step 3, image 3 of 3

Remove the left driver housing with care not to strain any connected cables.

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Step 4

Sennheiser HD 350BT Battery Replacement: step 4, image 3 of 3

Disconnect the battery connector.
Use an opening tool to gently pry and remove the battery.
Take care not to bend or puncture the battery.
Apply adhesive to the new battery prior to installation if necessary.

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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.