Hey Bruce got this floating around though might be perfect size for your blue thooth auido setup its bit quriky tho uses usb-c for charging and usb flat for out put prob hot air conectors out was for a single 18650 cell @ 3.2v some photos included nice kit and as if blew the amp ic tisk tisk sir , btw about same age as you i do console repairs bga reflow and franken ps3 fats , also hope retro techy got my pun playing with his wang now rofl....no comment bro , reminds of shadow warrior *you no mess with low wang* :p , love ya retrotechy just but of pun mate <3