battery hack

Hi, I recently bought a BOXI.. It's a mechanism that you could attach a second battery to and onto the Inspire 1 for the extra safety. I was wondering if anyone else has bought one?

I've soldered lipo's plenty of times before and I'm well aware as to their chemistry and how aggressive and dangerous they are(made an electric skateboard and multicell batteries from scratch). I have an idea that I'm sure someone must have tried.. Who has ripped open a dead tb47 or 48, then...