*Untested **
Incipio OFFGRID Power Pack Moto Mod, a snap-on external battery accessory for Motorola Moto Z series smartphones. It provides additional battery life via the magnetic connector pins on the bottom of the device.

Features and Specifications
Brand: Incipio
Capacity: 2220mAh/8.2Wh
Compatibility: Designed for use with various Motorola Moto Z models, including the Moto Z, Moto Z Force, Moto Z Play, Moto Z2 Force, Moto Z3, and Moto Z4.
Model: MT381
Input/Output: 5VDC, 2A Input; 5VDC, 1.3A Output
Functionality: The Mod attaches magnetically to the back of the compatible phone to extend its battery life.
Charging Method: It is typically charged while attached to the mobile phone.