The Veetop is a cigarette lighter chargers the most powerful of the moment, since it comes out 3.4 amps (17 Watts) two USB ports, is 2.4 A and 1.0 A if you connect two devices, or if you do 3.4A plug in a device.
Most smartphones and mp3 players requires only one small amp to load, but then will be a slow charge, worse for the life of your battery a quick charge, unlike any what has been written so far on slow vs fast loads loads (see the article in the computer world on September 15, charging experiences of Lithium-ion batteries Stanford University).
As for iPads and iPhones 6 other, they require at minimum 2A to load, which easily provides the Veetop.
2 - of cool features
The Veetop has a so-called intelligent charging function to adjust the amperage supplied to the device, regardless of the port you connect it; so you do not need to look like some other charger port that provides 2A; Connect your device and adapts veetop (within the limits accepted by the course charger). When the unit is loaded to 100%, the veetop rocker in "minimum load"
The veetop has a circuit against overcurrent, voltage, load and heat. With all here, do not burn your device.
3-1 compact and stylish design that exudes strength
This is probably not the most compact chargers because the blue part that you can see on the picture above entirely from the cigarette lighter, but I have not found the smallest for this amperage.
The electrical contactors are made of solid metal and ensure excellent contact, no contact failure observed, and the materials are of high quality (plastic and aluminum)
The veetop also available in white and green, but for my part, I prefer the black and blue.
4 - and more
Finally, there is a version 4.4 A / 22W (2+ 2.A.) with a square design (for the upper part) may be more cumbersome, but now the same price for those who want a quick charge of two simultaneous ports (is still wanting because you have to imagine plug into the cigarette lighter socket even a big smartphone and tablet)