I've tried lots of different chargers for my s3 and honestly the best one seems to be the official Samsung one. The same as comes in the box wwhen youfirst purchase your s3. Other chargers ioverused always seem to have issues with charging too slow, or getting very hot, or breaking pins off only a month or two after purchasing them. Look for a Samsung 2amp charger from Amazon or another trusted source. All the aftermarket ones don't seem very reliable to me. I picked one up for half price off Amazon compared to getting it from Samsung 's site.