Power banks with pass-through charging

Pass-through charging

— a feature that allows a power bank to transfer power to other external devices for charging them. Note that pass-through charging can be implemented in different ways. In some cases, a power bank can supply all incoming power from an energy source through a USB port; in others, the power bank coordinates the power consumption with the gadget being charged and accumulates the remaining energy in the cells of its own battery. In the latter version, both devices are charged at the same time. However, the presence of such a function is not often specified by the manufacturer. Sometimes even the manuals do not provide information on pass-through charging. Therefore, it is better to focus on the reviews and, before buying, clarify the availability of pass-through charging.