AliExpress offer: Purchase QC3.0 Quick Charger at just 4.20$ = Rs.305. Quick Charge 3.0 supports upto 18W charging. At its most simple level, Quick Charge allows for high levels of current to flow to the battery, in an attempt to maximise its charging efficiency. The latest Quick Charge products also tend to charge their batteries at higher voltages, allowing for a higher rate of power transfer through commonly found cables.our phone may support charging at 9V/2A, but if you only have a 1A charger then the process will take longer. Likewise, plugging a 2A charger into a phone that can only accept 0.7A won’t make it charge any faster. So buy this deal now!