I have a way to measure battery power

[webmasterpdx]

if x = 315, y = 14 thru 4 are filled with green #8400h, then it's 100%.
The next level down is 14 thru 6, which according to HP is 75%.
My algorithm will return 80%.
The problem is that 11 pixels apply to 100%, which means the following:
11 pixels = 100%
9 pixels = 75%, but it's 81% of 11 pixels.
I'll report on the next levels when i reach them....