This is a new battery I bought on Amazon a while back to replace the failed battery in my Studio Pro Wireless headphones. It looks identical to the original. I took my headphones apart and the battery connector was oddly corroded and broke as I disconnected the old battery. It’s not worth trying to fix the headphones now. I have not attempted to do anything with the new battery except take the photos in this ad. I don’t have a way to test it or charge it so it would be your risk. This battery should work with Studio Pro Wireless (A2924), Studio 3 Wireless (A1914), Studio 2 Wireless (B0501) and Studio 2 Wired (B0500). It cost me about $40 with tax. I’m asking for $20.