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V 6.55 W·h (1715mA·h) Li-Po [9] [11] [12] 150 min charge time for an average of 8 h 15 min use [13] The iPhone 6s, 6s Plus, and first-generation SE support iOS 12, which was first released on September 17, 2018. They also support iOS 13, unveiled on June 3, 2019, and was released to the public on September 19, 2019; as well as iOS 14, unveiled on June 22, 2020, and iOS 15, unveiled on June 7, 2021. These phones support most of the main features of iOS 13, including dark mode. Along with the iPhone SE, the 6s and 6s Plus are the oldest iPhones to support iOS 13, iOS 14 and iOS 15.a b "iPhone 6s Teardown". iFixit. September 25, 2015. Archived from the original on January 10, 2016 . Retrieved September 25, 2015. iPhone 6s battery issues may be more widespread than Apple initially thought". The Next Web. December 6, 2016. Archived from the original on December 6, 2016 . Retrieved December 7, 2016. Snap Photos and Record Video on an iPhone at the Same Time". Lifewire. January 22, 2020. Archived from the original on September 15, 2021 . Retrieved July 17, 2020.

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