OnePlus 5 will be thinner than its predecessors, could be unveiled June 20

The OnePlus team has skillfully built up hype for the OnePlus 5 and now we hear that the end is in sight - June 20. Wait, wasn’t the event scheduled for June 15? That's what previous report said, but it's difficult to be sure which date is real without confirmation from Pete Lau or Carl Pei, the leaders of the company.
What Mr. Lau did say (on Weibo) is that the 5 will be the thinnest flagship (but not at the cost of user experience). Considering that the OnePlus 3T was 7.4mm thick, we’re looking at something even thinner. The company’s thinnest phone to date was the OnePlus X (6.9mm), though we’re not sure that counts - OnePlus is quick to forget the X ever existed.
Anyway, even at 7.3mm it will be quite a challenge to to fit a 3,600mAh battery. It makes you wonder if the earlier 3,000mAh rumors are not closer to the truth.