Iguana, bwana
Did you try yours with 4.5v (or even 5.1v with the e2s)? BTW, some specs on the e2s say they are rated at 1.5v with a 1.72v initial peak, so the glory may not last...
I have a 10mw green module from Jaycar, and when I cranked the pot over, like yours, it seemed at least 3x as...