iPhone 6s official reveal video showcases a smaller 1715 mAh battery

The figures Apple gives for talk time and browsing are identical to last year's 6 plus, so hopefully the IOS 9 developments will ensure that a smaller battery won't affect things in an adverse way. Fingers crossed. Although I do feel the lack of comment in the keynote is rather conspicuous by its absence. Sent from the iMore App

Could mean the 6S has worse battery life than the 6. Doesn't seem to matter though. Apple knows their followers are forgiving of battery life shortcomings.

Having been a beta tester for iOS 9, I can confirm that there are some tremendous leaps in battery life coming from software alone. I actually bought a Mophie at the beginning of the summer, as I'd been having trouble making it through the day. When Beta 2 hit, I found myself almost immediately regretting buying the Mophie. My screen on time was improved by roughly 25%, and my standby time has improved too.

The issue is people want the quote times to go up, not stay the same, and certainly not down (cause you always have to take OEM quoted battery life with a grain of salt as they always come with a ton of disclaimers).

I don't care, especially if the 6S gives me a day's worth of juice like my Six does. Have to think Processor and IC efficiency plus iOS 9 optimizations will compensate for the minor drop off of MAh. Sent from the iMore App

The smaller battery does make me nervous, but the claim of iOS 9 giving the current iPhone 6 an extra hour of battery life makes me think the 6s will break even with it. That being said, Apple is going in the wrong direction and there is honestly no reason the 6s doesn't have at least 2,400 mAh.

Yes there is a reason- No noticeable physical changes to the phone. Unless Apple has gone crazy and decided to have empty space inside the phone, they clearly needed something to give with the inclusion of 3D Touch and not changing the exterior design. Sent from the iMore App

From the reveal video it looks as though the Taptic engine takes up space that the battery could occupy. So something that consumes battery (vibrate motor) takes away even more precious battery space.

It's bigger in length, width and thickness.

I rarely go dead in a day anyway. As long as it gets me through the day I am fine with that.

I give up, we'll never see a week of battery life. Samsung makes more efficient processors and screens, then reduce battery size so that we end up with the same battery life. Apple has clearly gotten their hardware and iOS 9 more efficient, so battery size reduced. Posted via the iMore App for Android

Since when is 9.5% a small drop? That's a large amount regardless of how much more efficient the phone may or may not be, especially since the phone is bigger in all dimensions compared to the 6.

9.5%? More like 5% Posted via the iMore App for Android

Someone's math is a bit off. 1715/1810=0.9475138122. That's 94.75% of the same battery life. Or a loss of 5.25%

It's over 5%, but given a quoted 10 hours of usage that's still 30 minutes or more of in-use time on the battery, which is not-ignorable, and it's why even on Android phones upgrades that increased the battery capacity by only a couple hundred mAh got significant upgrades in usability when coupled with hardware and platform/software upgrades. That being said, other OEMs have also started shaving off battery capacity for thinness and other reason. Samsung did the same thing in the S6 and Note 5, and HTC was also known (for years) for putting the smallest batteries they could get away with in their devices.

So any idea if it changed on the 6 plus? Sent from the iMore App

So any idea if it changed on the 6 plus? Sent from the iMore App

I'm really not happy with this. This is the first year since the ip4 where I'm not going to upgrade. Sent from the iMore App

I don't understand. Why all the knickers in a twist? A lot of other things changed with the iPhone 6/+/s. The A9 is supposed to use less power. iOS 9 pretty much certainly uses less power. Taptic probably uses more. Just because gross battery capacity went down 5% doesn't tell us anything about battery life for the system as a whole. Theoretically, battery life could have improved. Apple says the battery life is the same. Also… no real-world testing yet. It's entirely too early to draw conclusions — other than that It would be bad for Apple if they lied about this. So- I suspect the battery life is the same.

Well said. The pre release bitching this year totally off the chain for whatever reason. My work phone is an old 4s that's been running iOS 9 public beta for about a month and it works hard with phone calls, emails, etc all day long. It has yet to go below 50% on iOS 9. This was not the case on iOS 8 so that is saying a lot considering this phone has the original battery and has been used daily since I got it in October 2011.

People are "surprised" because for once Apple actually didn't try to set a thickness record, and they still managed to shrink the battery... All devices get upgrades with more efficient internals. Some people are acting like these advances in technology are somehow exclusive to Apple. That's how it always works, even in Desktop and Laptop computers that's how it works. The issue is, when you decrease the battery size, you actually take away some of the benefits of the greater efficiency of the hardware platform. You basically turn a device that should have higher quoted usage times into something that is just "status quo" by removing capacity from the battery. Basically, Apple is keeping their profit margins up by using cheaper, lower capacity batteries in their devices leveraged against more efficient internals. This is a bit opposite of what most people are used to. They're used to battery capacity going up, while internals are getting more efficient, resulting in them reaping more benefits from technological advances in these devices. Galaxy S devices went from 1500 -> 1600/1850 -> 2100 -> 2600 -> 2800 mAh in battery capacity and they got thinner every year. Only in the GS6 did Samsung go backwards in capacity, and they paid the price for it, as well. I have no doubt these phones get at least comparable battery life to the current ones. The M9 is in the CPU now, and the process is more energy efficient. Display Tech Improves as well as Cellular and GPS Radios getting more efficient. But it's disheartening that they value profit margins that much over delivering those benefits to their users. There's basically no benefit from the increased efficiency of the internals, because they basically shaved it off by lowering battery capacity instead of adding it (so the net loss in battery capacity is possibly, theoretically, much larger than 5.3%- which is about 30 minutes of usage time with a quoted usage of 10 hours).

Some phones go 3 days without recharge. Apple knows most of the buyers wont check the spec list anyways. no loss for them.