Meet Stacked, a unique battery case solution for the iPhone ... Instead, a separate 2,750 mAh power pack and a special wall charger are included in the system. The separate power pack that ships ...

The OtterBox charger is a USB-C battery about the size of two iPhone 14 Pro Max units stacked on top of each other. It is not, as you can guess, a lightweight battery you can easily fit in a pocket.

Samsung is developing stacked battery tech for smartphones, and the iPhone 18 and Galaxy S26 could be the first beneficiaries ...