BMX

A magnetic power bank snaps to the back of a compatible phone and charges without a cable, which is the difference between topping up while you keep working and being tethered to a desk. Capacity is the real decision: 5,000mAh is roughly a phone charge and stays pocketable, while 10,000mAh is closer to two and suits a day out of the office or a unit shared across a team. Colour is worth choosing deliberately when several banks live in the same drawer, since it is the quickest way to tell whose is whose. See power banks, USB and charging cables and on the road supplies.