Sennheiser RS120 Battery Replacement

Member-Contributed Guide

Member-Contributed Guide

An awesome member of our community made this guide. It is not managed by iFixit staff.

Replacing worn-out the rechargeable batteries in the wireless headphones.

  • Author: Gayle Dunham
  • Time estimate: 2 minutes
  • Difficulty: Very easy

The rechargeable batteries are located behind the left ear cushion. Remove the ear cushion by rotating a quarter turn counter clockwise.

Ear cushions The ear cushions are secured to the earcups by means of a quarter turn fastener. To remove an ear cushion, turn it in the direction of the arrow until you overcome a slight resistance and lift it off the earcup.

Rechargeable batteries

Attention: Only use re-chargeable batteries, never use standard batteries! Insert the rechargeable batteries. Charge the batteries for at least 24 hours prior to first time use. Subsequent charging time is approx. 18 hours per charge. Place the headphones on the charging cradle of the transmitter. The red LED lights up, indicating that the batteries are being charged. The LED remains lit even when the rechargeable batteries are fully charged. The unit has overcharging protection.

Nearly discharged batteries will significantly reduce the sound quality.

Relevant Parts

Edit Step 1 Battery  ¶ 

Image 1/2:

Edit Step 1 Battery  ¶ 

  • It's just that simple.

Conclusion

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

Now that you've finished, share your repair story with others.

Write a story

4 Comments

Add a comment

Thanks for the information - this made changing the batteries a snap.

Jim K - Reply

Extremely helpful. Thank you!

-Randy N

Randy - Reply

I own three sets and one quit working. As it turns out that the rechargeable batteries in that one set need replacing.

Until I purchase some rechargeable batteries, I am using standard AAA batteries and just have to remember NOT to put the headset back on the cradle.

Thanks for the info on how to access the batteries !

mcgilljp - Reply

Thanks! You solved my mystery.

Marilyn Carini - Reply