Hi ubercrow, there are certain posting requirements before you can post everywhere in the forum. I thought the vamo forum was 5, but the server has to also reset - which it does at 20 or 25 past the hour. You can read more about those requirements
here
And as for your question, I am not sure what the issue is, but I would suggest you remove your protank and disassemble it and give it a thorough clean. I doubt if a fully charged battery or the electronics 'messing up' will cause such a tight draw that you are getting a headache.
I am not familiar with the protank 3, so I don't know where the airholes are. But they are usually in the bottom connector that you screw into the battery - so make sure these are clear - you should be able to poke them out with a needle or a thin toothpick. I know I have blocked mine before when cleaning with a tiny piece of lint - so it's worth checking.