Power bank batteries with suction cups

Suction cup

— the presence of suction cups on the body of the power bank.

Such devices allow you to attach an external battery to the body of a smartphone or other portable gadget. This makes it possible to use the device being charged in normal mode without any problems, without interrupting the charging process (except that certain features, such as the rear camera, may not be available). Also note that this feature is especially useful for wireless charging (see above) — including when a gadget with a power bank is simply lying idle. In particular, the suction cups reduce the chance of the device falling off the charging platform due to shock or being hit.