Editing Aegray wireless (section)

= Power =

For wireless power, I bought two external usb battery packs (generally used for phone charging).  They have 7800mAh which provides incredibly long battery life - I forget what the draw on the teensy+xbee is but I'm guessing its <100mA.  These are held in place on the back of each hand piece by extra strength velcro, and the mini usb cable goes through a hole in the back plastic piece inside to the teensy.