imo opinion you can't really binge on it because the serotonin depletes in your brain. But the closest thing I had to an ecstasy binge was like this, first night swallowed 3 methstastys, and there was one good roll in the batch so I was up all night and tried to take subutex to chill me down(\[we're into day 2 now] so later this night on day 2, I was still sad about the nasty meth rolls so I bought about 10 rolls from a different friend. popped 4 throughout that night[these were good rolls]. The third day I felt so tweaked out/messed up I didn't want to take pills anymore...and I still don't know if it was the pills but I did get really sick I vomited a few times and the rest day of it all I stayed in my room pretty much, so the vomiting and illness could either have been the pills, but there was also a lot of illness going around with people I make contact with often...so who knows.
Well the answer is 9 days. But that was coke / crack, not E. In regards to E, I once took over 3.5 grams. I was rolling my ass off for 4 days straight. I slept every night and woke up floored still.