I have it in my possession for a short time and I performed various refills on different devices, sometimes one device and 2 smartphones times over, and many battery works fine. By cons is not charging android tablet PCs as shown in the ad. In addition, the weight, but good there as well dependably, we get something for nothing ... Battery Level Indicator TOP!, Green color and on 4 levels, very effective in anticipating charging and discharging ... Product finishing with plastics of good quality. Recharges via USB cable or if you had a charger for smartphone charger with micro USB tip, it goes fully.