Check the pics which I have attached. The first pic is showing fast charge by charger which came with my phone. The second pic is showing charging with this charger. I connected at different battery power level like 45, 55, 65 % with my original charging cable but the charging current never went beyond 1750. This is simply cheating. This is a replaced one. I did a similar testing with the first one which showed same result. I thought that was a manufacturing defect so went on for replacement. But now I know it's not doing what manufacturer claim. Anyway I will return this now.