What kind of battery does the Sennheiser TR136 USE?

Amazon or direct from Maker.

https://www.google.com/search?q=Sennheiser+TR136+replacement+ear+pads

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you can google Sennheiser tr130 manual for answer took less than second to find answer and follow ink

You can contact Sennheiser customer support by visiting their website and clicking on the "Get in Touch" button. You can also find an authorized Sennheiser service partner, submit a warranty or repair request, and find spare parts and accessories on their website. Alternatively, you can use the chat or form on their website to get in touch with Sennheiser customer service for all your questions about their products, repairs, spare parts, and accessories. Contact ' Sennheiser (sennheiser-hearing.com)

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If you twist the earpiece,one of them has two NIMH AAA batteries ,worth checking out if these are gone ,which is what happened to me.I was about to bin my rs130's and just stuck two new rechargeables and the earphones are working again!!!!!

As for $20 dollars from sennheiser for replacements!?!?!?
You should pick up two NIMH batteries for a couple of bucks on ebay or amazon.DO NOT USE ORDINARY BATTERIES!!!!!

Hi,
You need 2 AAA batteries to put in sennheiser rs130
Thank You

A replacement battery can be purchased from Sennheiser for $20.00.
Battery Part Number: BA 151
Sennheiser Link:
http://www.sennheiserusa.com/newsite/productdetail.asp?transid=004146

A replacement battery can be purchased from Sennheiser for $20.00.

Battery is: BA 151

Sennheiser Link:
http://www.sennheiserusa.com/newsite/productdetail.asp?transid=004146

I had a similar problem - after owning them for 4+ years, no sound we coming out, and no beeps -- nothing. The lights on the charger stand were on though.

I tried buying new rechargable AAA batteries and they were NIMH (nickel metalhydride?) and still didnt work. I borrowed a friend's pair of NICM (nickel cadmium?) AAA rechargables though and the problem was solved!

So, it would seem the some of the new chargable battery types might not work in older models of this unit (which is also called the RS 130 now in the US and Cdn web sites).

Hope this helps!

Replace the NiMh batteries. They might be bad. Could happen during power surges as you indicated you had. Let them charge up fully 14-18 hours as the book suggests.