Hair clippers with a microUSB port

MicroUSB

— an old but still common port option, especially in budget clippers: it's usually not difficult to find a cable because many people have them left over from old gadgets. It also offers a certain universality and the ability to charge from a power bank, but compared to USB-C, it's often less convenient and potentially less durable with frequent connections. Compared to a proprietary connector, microUSB wins by allowing you to easily replace the cable without overpaying for original accessories.