ios 11.2.5 battery drain

Per Apple's push notifications, we updated all of our IOS gadgets (2 iphone x, 1 iphone 8 plus, 4 ipad pros, 1 ipad mini) to ios 11.2, and then to ios 11.2.5 in the past two weeks.

Since the 11.2 upgrade all of these devices have experienced gravely diminished battery life - maybe 2 hours - or 3 hours if the gadget is sitting without being used.

This appears to be a software flaw.

It's not something that can be solved by restricting the apps or dimming the screen, etc. We've done all of that to no avail. - And it occurrs over multiple, recently-purchased Apple hardware.

Is anyone else experiencing this?