The Mophie Powerstation 8X is the only power bank here with built-in Bluetooth.
It lets you monitor its battery life on your phone and set up notifications, such as charging finish or low battery, via the Mophie Power app (available for Android and iOS).
The Powerstation has a very Apple-like design with its sleek aluminium construction.
On one part of its top edge, which has a black rubberised coating, you will find a micro-USB charging port sandwiched between two 2.4A USB output ports.
On one side, there is a power button with a four-LED battery indicator. You press and hold the power button for 4sec to pair with phone.
While the power bank looks sleek and is only 12.2mm thick, it has a pretty big footprint.
Thus, it takes some effort to grasp it with one hand.
I recommend putting it in your bag instead. It took 1hr 11min - third-fastest device here - to charge my iPhone 6s Plus from 50 per cent battery level to full.
•Verdict: The Mophie Powerstation 8X might have the Apple aesthetics and Bluetooth feature, but it also has a hefty price tag.
BATTERY CAPACITY: 15,000mAh
OUTPUT PORTS: 2 x 2.4A USB
VALUE FOR MONEY: 2/5