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I got 14.5 hours usage on one charge with my year old iPad Pro 9.7" on iOS 10.3 yesterday.
(40% streaming TV, 30% Safari, etc)

So the battery is certainly no worse for me!
 
Oh boy here we go. I updated to the new iOS 10.3 today and I just notice that my battery is not lasting as along before the update. Before I would use my iPhone until the end of the line of 1%. My phone literally just turned off on 5% that's crazy. Also when the phone power up again it showed that it was at 19%. Can someone tell me what the Hell just happened??

Ah your iPhone must be about ~1year old? This behaviour will only get worst. I've had it happen on 3 different iPhone models. Only solution was a new battery.
 
iPhone 6, on 10.3, battery is worse, or better the percentage wich is shown. On 10.2.1 I had sometimes over 30 hours of Standby. Now with 10.3 Use: 2hrs+ of use, Standby 8+ hrs. This morning 10%, opened Facebook, some seconds and Messenger some seconds too, down to 4%. I waited more then 1 hour, still at 4%. Plugged it in, jumped to 21% within seconds. Unplugged it, to take photos, down to 10%. Plugged it in again and in a relatively short time, it is now at 89%. I think iOS 10.3 is to blame, not our batteries.
Mine turns of at 1%. It stayed on 1% for several hours, with iOS 10.3.
Still Safari seems to eat up the battery quite fast. Even before we got iOS 10.3.
 
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iPhone 6, on 10.3, battery is worse, or better the percentage wich is shown. On 10.2.1 I had sometimes over 30 hours of Standby. Now with 10.3 Use: 2hrs+ of use, Standby 8+ hrs. This morning 10%, opened Facebook, some seconds and Messenger some seconds too, down to 4%. I waited more then 1 hour, still at 4%. Plugged it in, jumped to 21% within seconds. Unplugged it, to take photos, down to 10%. Plugged it in again and in a relatively short time, it is now at 89%. I think iOS 10.3 is to blame, not our batteries.
Mine turns of at 1%. It stayed on 1% for several hours, with iOS 10.3.
Still Safari seems to eat up the battery quite fast. Even before we got iOS 10.3.


My 6s plus gave me issues as well. But now it was 4% for a long time before it turned off. I agree that the issue is with the new update not the battery.
 
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Installed 10.3.1 - Handsfree calling on my TomTom setup is still broken. Call comes in, but when picked up no sound. Caller also has no sound. Only toggling the sound menu from TomTom to iPhone and back resolves the problem for each separate call.

Can't say that things go visually faster at all. Battery life hasn't changed. Application settings were gone in the main settings menu with 10.3, but are now back again with 10.3.1.

On iOS 9 and 10 it became clear that my iPhoneSE battery is drained much more when it was connected to busy wifi networks (company network or public wifi). Even when on standby and no applications/push services active, heavy network activity on wifi drained my iPhone significantly. After a couple of weeks using only 4G, the battery life was much better: 2-3 days.
 
Installed 10.3.1 - Handsfree calling on my TomTom setup is still broken. Call comes in, but when picked up no sound. Caller also has no sound. Only toggling the sound menu from TomTom to iPhone and back resolves the problem for each separate call.

Can't say that things go visually faster at all. Battery life hasn't changed. Application settings were gone in the main settings menu with 10.3, but are now back again with 10.3.1.

On iOS 9 and 10 it became clear that my iPhoneSE battery is drained much more when it was connected to busy wifi networks (company network or public wifi). Even when on standby and no applications/push services active, heavy network activity on wifi drained my iPhone significantly. After a couple of weeks using only 4G, the battery life was much better: 2-3 days.
Battery life? Wait, the update is fresh! iPhone 6, Low Power Mode: 19%, some hours!
Edit: Some more hours with 19%. Then I disabled Low Power Mode for a while, battery went down some percent. Low Power mode again, yesterday, at 1%. This morning, when I woke up, sitting still at 1%. Some minutes... woke up the display 2-3 times, went into the App Store clicked on Updates and after 1 second shutdown. So mine has seen the charger before the update to 10.3.1.
 
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