Ultra fast delivery, I received exactly the estimated day! At first, the light said that the battery was charged as soon as I plugged when she was flat, but I read the previous reviews and the problem was solved, I put the battery in the other direction and it's loaded, it's perfect !! I bought it to save my s2 which usb port no longer captures the charger. it takes 2-3 hours to charge but I advise you to have a second battery to alternate during charging, this is what I intend to do! I am satisfied and I recommend !!