basic battery info

had trouble finding an easy way to do all this, the current code is
taken from
http://stackoverflow.com/questions/6153860/in-python-how-can-i-detect-whether-the-computer-is-on-battery-power
-> the actual battery status seems to be more complex to get with simple
ctypes, looking into other solutions for windows
using WMI python module to get the win32_battery class
majority of windows battery information available

design capacity and cycle count still missing, check out my question if
you have a similar issue:
http://stackoverflow.com/questions/16380394/getting-battery-capacity-windows-with-python