Works well but powerbank pocket is small.
This works fine. It has a high circular heating pad that goes by the back of the next. But the pocket for the USB bank is small. It fits my USB bank that is 2.5cm x 5cm (1x2 inches). If I were to guess I'd say if you took the longest side width and 2 times the thickness, it would fit a powerbank with a partial circumference of 5cm + 2.5cm + 2.5cm or 10cm.<br /><br />The button does not have to be held to turn it on. This has pros and cons. One con is the button could be turned on while in a bag or purse accidentally, and run down your powerbank. For safety simply disconnect the USB port from the powerbank.
Rating: 5 stars