Sweet, a battery connector!

First things first, we disconnect the battery to prevent accidental shorts or discharges. Always nice to see a battery with a connector like this, so we don't have to bust out the soldering iron.

The battery is very strongly adhered in place—probably so it can help stiffen the case to protect its precious cargo—your brand new iPhone 6s.

With 7.13 Whr (1877 mAh at 3.8 V) capacity, this battery more than doubles your iPhone 6s (6.55 Whr) capacity.

Although if raw power is what you're after, there are plenty of other options, with nearly double the power of the Smart Battery Case.