This charger is the slowest I have ever used. I imagine that his power does not exceed 400 mA (0.4 A) while claiming the title and label have a output of 2.1A. My phone usually load in less than two hours took over 5 to 100%. Now I have to waste my time, return to the station and wait for the return delivery of another charger (another brand of course). What a waste of time ...