Apple has released two different models of their iPhone 6s handsets. The iPhone 6s and 6s Plus share a lot of the same features such as 3D Touch, Live Photos and 4K video recording, but there are a few slight differences.
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The iPhone 6s is equipped with a built-in, non-removable rechargeable lithium-ion 1715 mAh battery. According to Apple it offers up to 14 hours of talk time on 3G and up to 10 days of standby time from a single charge. Internet use is listed as 10 hours on 3G and LTE and up to 11 hours on Wi-Fi. The iPhone 6s also offers up to 11 hours of HD video playback and up to to 50 hours of audio playback.
The iPhone 6s is equipped with Apple's A9 64-bit chip with 2GB of RAM. It is available in 16GB, 64GB and 128GB storage capacities and it sports a built-in rechargeable lithium-ion battery with up to 14 hours of talk time, 10 hours of internet usage, 11 hours of video playback and up to 50 hours of audio playback.
The iPhone 6s has the same form factor as its predecessor the iPhone 6, except that it is 0.01 inches thicker and wider. This increase is so minor that it should not affect cases, but just to be sure you may want to check with the manufacturer. For example, Speck announced on its Facebook page that all its iPhone 6 and iPhone 6 Plus cases fit the next generation s-devices.
