I use the Wentronic PowerBank for almost a year. I know that can be loaded by conversion losses niemels 5000mAh. However, I do not get anywhere near a battery is fully charged before the Power Bank is empty. I also own a cheaper device with 5000mAh, which I had bought on Amazon. Thus do I charge my phone and almost my entire tablet before the unit is empty. The enclosed power also sitting pretty loose and the Power button will activate love of self, when the device is in a pocket. I can therefore not likely to recommend the Wentronic PowerBank.
