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iPhone 7 here: Installed it roughly 11h ago and lost 5% (from 100 to 95) over night and am now at 87%.

Phone is coolish and no noticeable slowdowns or issues.
 
Can't comment on overnight since I charge mine while I sleep, but battery life seems as good, if not better, compared to Beta 3. This is based on my usage from just this morning.
 
I am getting horrible life on my 7+. Installed around lunch yesterday. Seems OK in standby, but with screen on draining fast. I normally listen to google play music and read articles on facebook from the time I get up till I get in the office ~2 hours later. Normally I am around 85% when I get in. Today I was at 53%. I will be resetting to see if it helps.
 
iPhone 7 here with zero battery issues. I squeezed about 5 hours and 20+ minutes before it got to 40% and I put it back on the charger. Not bad.
 
Not only does the battery life suck on both my Pros and iPhone 7, but my iPhone 7 is really really laggy on iOS 11 Beta 4.
 
7+ here. Beta 4 is very smooth. Almost normal battery usage compared to 10.3.3. No crashes yet and is, to me, daily driver worthy.
 
No issue on 7 plus, on 10.3.3 i would be on 74% and with beta 4 i am on 77% ( Impressive).
usage -> 2hr 24min
standby 10hr 20 min
 
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Installed PB3 on my iPhone 6S+ yesterday and have seen no significant battery difference. I'll admit to being a moderate user so this may make a difference. Even lighter on the iphone 6S+ as I'm using it strictly to play around with IOS 11, it doesn't even have a sim card in it.
 
Noticed mine 6s may be showing the wrong number on the percentage at the top of the screen. It 1% almost the whole day.
 
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