"Kanex® – makers of i-connectivity accessories – thinks that we should not have to choose which device to charge. Their high powered DoubleUp gadget provides dual charging. But the big difference between it and others dual chargers out there? A full 2.1 amps per port with 21W. To the non-engineers out there (like me) that means you can charge two iPads at once – even the newer generation ‘power demanding’ iPads. Basically, DoubleUp provides more power than two individual chargers. The green indicator will let you know when you are full of juice."