iPhone 6S Plus Battery Performance

[Anuba]

Have you posted a screenshot of what's chewing up your battery?

C

Can't narrow it down to a main culprit as there's no single app or service that stands out... everything looks normal in the software department. I did however notice a massive acceleration in battery drain while downloading some apps. Went from 30% to 23% in a few minutes. Maybe 802.11ac is the kryptonite? I wouldn't know... all my other iOS devices use 802.11a/n and their batteries certainly don't buckle under a few app downloads.

 

[yashz]

So it probably is not chip related. I posted before about how my 6s+ last about the same time as my 6. I've restored and installed 9.0.2 but it's still not lasting long at all. The guy I talked to at AppleCare on the phone gets off work earlier than I do so I didn't get a chance to call him back yet. I just stopped by the Apple Store though and the genius here said something doesn't look right with my battery usage (screenshot below). By some dumb luck I got an appointment in less than an hour. Really want to get the battery drain issue fixed...

 

[MuGeN PoWeR]

mine

 

[shez]

Mine

 

[Anuba]

I ran a couple of tests pitching my 2 year old 5s against my new 6s Plus (Samsung N66AP).
5s: Manufactured 11/11/2013, max charge 1476 mAh (95.3%), 345 loadcycles.
6s Plus: Manufactured 9/21/2015, max charge 2730 mAh (100.3%), 4 loadcycles.

BT, WiFi (ac) and LTE enabled, bg app refresh ON, location services ON, auto app update ON. No optimization except WiFi assist OFF. Apps/settings identical.

Nonstop streaming from Apple Music:
5s: 16 hrs 44 mins
6s Plus: 30 hrs 11 mins

Heavy use of Safari, Mail, Twitter and Facebook over WiFi:
5s: 7 hrs 19 mins
6s Plus: 8 hrs 8 mins

The advertised time for WiFi browsing is 10 hrs (5s) vs 12 hrs (6s Plus), meaning the 6s Plus should deliver 20% more. I got 11% more from the 6sP than the 2 year old 5s w/ 95% capacity.

The advertised music playback time is 40 hrs (5s) vs 80 hrs (6s Plus), meaning the 6s Plus should deliver 100% more. Of course that's with local files, not streamed music so I wasn't expecting anywhere near that. But it works for this shootout. The 6s Plus delivered 80% more than the 5s.

Not exactly scientific but the 6s Plus isn't quite delivering what it should. There's nothing to suggest it's the battery's fault AFAIK. 2730 mAh is a tad over design capacity and the discharge curve is even. Oh well.