Bose no longer supports the QC3 and I had tried another third party to get a new battery. It was non functional as the QC3 charger could not charge the battery. I ordered this one from Centenex and it all works well. Saved me from throwing a $300 set of headphones away. Great buy and great service

Bose no longer supports my headphones including the battery. I had tried another third party provider of these batteries but they would bot charge up on a Bose charger.
These from Centenex worked perfectly.. so for about 12 bucks I avoided throwing away a $300 dollar set of noise cancelling head phones.