the car adapter 2A is not a problem, for against the micro usb cable / usb is rotten provided the feed flow rate is so low that it has recharged 1/2 h 3% of my battery on my S4 while my previous Cord 0.7A I had before him recharge much faster, I tested with another cable and recharge it properly, in short, if you buy this product, consider taking another cord than the one supplied