Nitpicking is OK with me...
What you are missing, and I should have clarified myself, is the SPB Pocket Plus adds an additional battery meter to the top bar with the stock one. You can configure Pocket Plus to remove the one it places up there, but not the one that WM puts there. The WM battery icon is where you need the registry edit to remove.
Here's the link for Scahp's tool...
http://forum.xda-developers.com/showthread.php?t=317070