We are continually working on improving battery life. One thing that may help in the meantime is using Dark theme, which was a top mobile request added to Teams mobile in February.
I am running iOS 12.2 on an iPhone 8. Just yesterday 4/29/19, Teams is suddenly draining my battery at an alarming rate. 45% yesterday, today so far at 3PM it's used 33% 6m screen - 1h 15min backgd. I have closed the app, rebooted the phone and still it is draining my battery.
This is a serious problem. Please advise.