Apple has launched today its first official iPhone battery case for the iPhone 6S. Priced at $99, the new silicone case comes in both Charcoal Gray and White color options.
“Charge your iPhone and battery case simultaneously for increased talk time up to 25 hours, Internet use up to 18 hours on LTE, and even longer audio and video playback.* With the Smart Battery Case on, the intelligent battery status is displayed on the iPhone Lock screen and in Notification Center, so you know exactly how much charge you have left.” the product page said.
Aesthetically, Apple’s new iPhone Battery Cover Case is thin and also supports Lighting accessories like the Lightning to USB cable and the iPhone Lightning Docks.
While they do not specifically say how many mAh the battery is capable of, you should expect around 20 hours of increased battery time for your phone when using the case.
More information; Apple.com