[2018] Here's a new unique item and two early patch notes!

Recharge is only interrupted by things that actually interrupt it - previously this was any loss of ES or of the status (life/mana) protected by ES. As of 3.5.0, interruption is limited only to loss of ES, or the status protected by ES, due to damage.

Reaching full ES does not make you lose ES or the status it's protecting, and thus does not interrupt recharge (and there would be very little point in going to the trouble of making it do so, given it would be entirely possible for the recharge to start again after that interuption without ES having been lost).

Pretty sure you're actually thinking of CI, which has significant problems making any form of it you can easily gain and lose at will abusable. There's never been any problem with EB on items that I'm aware of.

Ah, fair enough. That's old enough that that'd be talking about the original version of EB (converted all ES into Mana), and there might have been a similar abuse case with that version, although I don't remember it off the top of my head.

Rage does not deal any damage, so yes.

That part isn't a change - ES recharge has never been interrupted by reaching full ES, only by losing ES or the thing it's protecting.

Vaal Righteous Fire would be the other one. It also technically matters for things which track whether it started recently, since if it was interrupted upon reaching full ES, it would then have start (and presumably immediately stop) again after the delay, and trigger those effects.

ES recharge can't start if it's already happening. Effects which would start it instead do nothing.