Worked Very Well For Me
The physical measurements differed slightly but it still fit in where I needed it and so far it seems to have restored the battery life on some noise cancellation headphones I have and didn't want to throw away.  For the price of the battery, I'm happy.  For the price of the headphones, I'm THRILLED!!!  This battery saved me a bunch more money than it cost!  Why 4 stars and not 5 --- just because the measurements were off which could be a problem for someone else (( this one was a little bigger and almost didn't fit )).
Rating: 4 stars