Galaxy S7 Edge Battery Case (Wireless Charging)
In the past Mophie made great battery cases, but this year Samsung has a few of its own.
The official Galaxy S7 Edge Wireless Charging Battery Case adds an extra 3,400 mAh of battery to your phone. This gives you a total of over 7,000 mAh for all day usage. The S7 Edge could last 4-5 days with this expensive case. Typically battery cases feel like a big brick, but Samsung uses a soft matte plastic finish for comfortability.
To make things even better, Samsung's battery case has wireless charging built-in. Drop your phone on a wireless charger and forget about cables.