With the Baseus Power Bank you can charge all your devices with it. Even your USB-C Macbook Pro will stay nice and charged for most of the day if your are just doing basic operations like emails but if you are tethering your camera to it and backing up drives then you will get about 2-3 hours. I have found that on photo shoots that if I start with a full charge and then after 2-3 hours of heavy usage digiteching the Baseus will be drained and I will still have a full charge on the laptop. So if you have a couple of these guys in your kit you could go the whole day on battery power. The plus side of this battery is its size and weight compared to other battery options like v-lock batteries which weigh more and are super expensive.