hahaha.. if you are brave to take apart a $1000 light you can make a battery pack :cool2:
-buy 9 cells...the ones with the tabs
-solder 3 cells in series + to - (soldering only the tabs together as they don't like heat) for 3 X 3.7v =11.1v, and solder a wire form the first + and another wire from the last -, don't connect
-parallel the 3 sets of 3, to triple mAh (soldering the + wires to the - wires)
-shrinkwrap, or go ghetto with the electrical tape
-attach the ganged + & - battery wires to terminals
-reseal, and make sure batt is secure in compartment so your soldering will not fatigue/fail. Light monkey uses hi tech surplus cardboard for this purpose
-go dive...