I bought two wireless battery packs from this store. 30,000mah. A small sized battery pack in comparison that can power phones and other devices wirelessly. For the price paid it is very good value. It does not charge as fast as my 15w wireless samsung wireless charger (for phones that have the ability to utilise this speed). But still charges very fast (only 30 minutes longer than the samsung wireless charger from empty) and has three times the battery capacity of the samsung for 1/3 of the price. Therefore i recommend this product. Comes with two usb ports for 5v 2.1a charging- so not latest super fast charging via usb- but still fast enough. Prompt delivery.