this while unit was off... so i tried a few other things just to get to the same point. HOT Battery..........
This one cost me Ready for this??? a whole $1.00 Dollar and guess what it actually works and the battery doest not over heat....Great.
1 all you need is one USB Car charger and take the inside out.
Second place it inside a Container of your choice. mine was a small tin. with rubber on the bottom and top of tin.
3rd a small switch solder all together hot glue the usb to the container plug it to your 9 v batt. and presto
No more pulling your hair out. this works,, cheers