With a Samsung power bank, you can charge your Samsung smartphone on the go. Power banks from other brands also work fine. Check out the fast-charging protocol in particular. Choose a power bank with fast charging and charge your smartphone extra quickly. With a 10,000W power bank, you can charge an average smartphone 1.5 times. A 20,000W power bank charges your smartphone 3 times and a 27,000W power bank charges an average smartphone 4 times. With Power Delivery, you can also charge other devices, like a tablet or laptop.