Recently, the industry recommended to the charging head of a Lightning charging cable, it is said that allows iPhone 8 / 8P / X support Qualcomm QC charge. If that is the case, have to say is an unexpected big change, because Apple and Qualcomm Between the constant lawsuit, the new iPhone suddenly burst out to support the QC charge, really puzzling.To this end, we specifically search for a bit in the 'iPhone X QC fast charging line', we can see more than one in selling this line, Estimated to be a program cracked, it will soon blossom everywhere.
Charge the head of the network with the hands of the iPhone X QC fast charge line connection Samsung QC charging head and the iPhone X, the test instrument used ChargerLab POWER-Z KT001, about 3 seconds later, the charging voltage from 5V up to 9V, the peak power of up to 15.3W. Apple 29W PD adapter to achieve the same level of fast charge on the iPhone X. Of course, QC charging can actually up to 18W, the current recorded power should be subject to Samsung Adapter power.
It seems that after this line, iPhone X can trigger the QC fast charge is OK. But the charging speed is faster? We have several times after the previous comparison of a variety of charging methods have been made clear that for the iPhone 8 , Whether fast charge has little effect on the overall charging speed, so we chose the iPhone X as the comparison object.
As can be seen from the figure, using this QC fast charging line to plug the foot power 9V2A QC adapter to charge the iPhone 8P, the maximum charging power recorded is 17.1W, which is beyond the iPhone X in non-fast charge mode Of the limit of power 12W (5V * 2.4A). It can be seen, this is not a deceptive QC trigger, but the QC voltage and power to enter the iPhone X really.
In addition to QC fast charging, this patch cord is also performing well for normal 5V2A chargers, and we know that an ordinary A-port charger can only charge 5V 1A for iPhone X without an iPhone charging resistor configuration. But with this adapter, you can easily go up to 5V 1.8A. According to the instructions introduced, this fast charging line with power adaptive function, for those who do not meet the actual power of the charging head, once the output voltage is Pulling down to 90% of the empty value will re-negotiate the charging current with the iPhone until the charging current matches the actual output power of the charging head, thus protecting the adapter and the handset.
Then the problem came, what exactly is this? Some people say that is through the Lightning agreement, unlocked the bottom of the iPhone in the egg. That is, Apple is actually making the iPhone to support the preparation of QC, but due to face, Not open it. Another possibility may be that the new iPhone already supports 9V high-speed fast charge, as long as the voltage trigger out on it. What do you think?