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Twitter and obviously any game is a horrendous killer, and surprisingly texts use a lot of battery which I wasn't aware of, if you're on a conversation texting anyway, for a few minutes
 
Is it safe to update to 8.1 on the 5s?

I'm wondering same thing. Sometimes my 5s gets good battery life like yesterday I had like 8 hours usage and 15 standby other days I get 6 hour and 16 standby. When I was on 7.1.2 battery was amazing


I get 4-5 hours usage on ios7..

30% brightness

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Like 9-10 hours usage and a day standby


Screenshot or it didn't happen...
 
Updated last night. Have to say the 100% has gone to 92% awful quick. See what rest of day is like and if it's changed much. If Apple sort their battery life out before everything else it'd be really useful.
 
Update: not good for me. Even worse battery life today and I've purposely avoided Twitter which was my biggest battery hog. I've not used phone as much as I usually do, but it's run down for me far quicker. I actually think it's a faulty battery to be honest.
 
Updated last night. Have to say the 100% has gone to 92% awful quick. See what rest of day is like and if it's changed much. If Apple sort their battery life out before everything else it'd be really useful.

What's "awful quick"? Took my 5s off the charger at 98% nearly 7 hours ago, and now it's at 87% with nearly an hour of usage. Depending on what I'm doing, my location, and my settings, the battery life on my 5s can range from 2 to 10 hours.

I haven't noticed any major changes in the battery life with any iteration of iOS 8. The only change to battery life I've ever noticed on my 5s was when I updated to iOS 7.1 and Apple changed how location services function in the background.

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Thanks but that's a completely different story and the recall date for the 5S was much later than the dates mentioned in that link. This replacement programme was for models made at the end of 2013 and the 5 wasn't even in production then.

Where did you hear about this? The only links on Apple's site concern the battery replacement program for the iPhone 5, which was announced back in August.

https://www.apple.com/support/exchange_repair/
 
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