Xbox 360 battery pack teardown

[LyonHrt]

http://hackadaycom.files.wordpress.com/2008/10/xbox360_battery.jpg?w=450&h=297

Reader, [Fox9p3400], opened up an Xbox 360 controller battery pack so we could all see what goes into one. It contains two Sanyo 2100mAh NiMH AA rechargeables (Model HR-3U 1.2V). In addition to that, there is an Atmel microcontroller (not pictured) and the copper temperature probe you can see above. He has more pictures on Photobucket.

Source Hackaday (http://hackaday.com/2008/10/04/xbox-360-battery-pack-teardown/).

[pibs]

I have been using Energizer 2500 mAh rechargeable batteries since I first got my 360 and no wonder they get more life than the pack. I always figured it was a Li-on battery, I hope they do release those since it would make the controller lighter.