Delivery time. Dock with two drums,, nothing to say, but happiness not to fall out of power, and more, so, it makes me three battery (with the original battery). By cons I find unfortunate is that there are only the docking station with just the cord, but not that the transformer connected to the mains, it is a pity. Advantage is that you can charge the phone and battery at the same time, so the finished battery failures. I recommend it.