The Belj BELJ-20000-NB-1-BLK is a 20,000mAh power bank with 100W USB-C Power Delivery, so it can charge a USB-C laptop or MacBook as well as phones and tablets. Four outputs (2x USB-C up to 100W and 2x USB-A up to 22.5W) let you charge up to four devices at once, which is handy in a meeting room, on a long-distance trip or during load shedding. The bank itself recharges over USB-C at up to 65W, so it refills quickly from a laptop-class USB-C charger. A digital display on the front shows battery percentage plus live voltage, current, charging/discharging status and efficiency. Inside is a 3.85V lithium-polymer cell, with protection against overcharging, over-current, over-voltage, overheating and short circuits. Esquire quotes up to five smartphone charges (device dependent) and describes it as airline friendly; always check your airline's power-bank rules. Black, 1-year warranty.