Unfortunately, the capacity of the battery was not satisfactory! Had repeatedly tried with him to charge my Galaxy Tab Pro 8.4. This has a 4800mAh battery. So it should be enough for at least a full battery charge, even on the basis of low losses. Unfortunately, it was not like that. The tablet is loaded only up to 70-80%. In addition, the external battery is very warm. Even after 4-5 charging cycles of the external batteries entered no improvement. Error was claimed by me and ordered a replacement. But unfortunately, since the identical problem. The support of easyacc was very helpful. Unfortunately it can not change the problem. Have now decided to try another battery.