It is small enough to pocket and suitable for around one and half times charges on a standard phone. The weight of 99g makes it be the lightest 5000mAh power bank. The round form factor is preferable to a flat device as it leaves more room for other things in a pocket. Autos detect your device and deliver fastest possible charge speed up to 2.4A, the fastest charging speed among 5000mAh power bank. It is perfect for camping trip.
But, This device uses a USB micro-B port to charge it up, so if your phone has a newer USB C port you'll need to carry an extra cable for that.