http://www.maximintegrated.com/app-notes/index.mvp/id/121
******************************
*  Lipo                      *
******************************

%   Volt
---------
0	  3,209
100	4,199


******************************
*   LiIo                     *
******************************
4.1 about 100%
3.5 about 0%

******************************
*   life                     *
******************************
3.6 100%
3.0 0%

******************************
*   pb                       *
******************************
2.1 100%
1.9 0%

******************************
*   NiZn                     *
******************************
1.9 100%
1.5 0%

