Hallo AW.
I cannot figure out right now how to post to both you and SilverFox, so I am writing separate messages.
I almost replied to your forum message, but then noticed that I had a private message from SilverFox who offered to disassemble the remains and try to figure out what really happened.
To my thinking, the offer from SilverFox is a better option for you and for CPF members than for me to take it apart. My University work would delay any investigation until at least Wednesday. Worse, I do not have a photo site, so I would probably send the photos to another CPF member to post in the forum. In any case as I already said, I have never taken apart an RCR123 cell with protection. So I would be operating in a double discovery mode. Not good.
I believe the most expeditious process would be for me to send the P1D with the vented battery as I currently have it to SilverFox to disassemble and provide his opinion and photos. OK?
Tim