the ravpower 14000mah was already fully charged at me, and I have my phone / tablet previously 3-4 times fully loaded. the ravpower never :-). The only drawback is the weight and size but one can not expect this performance and the size of a cigarette. :-) I am so far satisfied with the product. It reliably indicates the charge level and comes with pocket and two USB -> Micro USB cables. perfect when it comes to a festival again.