If someone just bought the phone charger accidentally lost or broke,many people will  buy another one from the Internet.but the problem is what is the reason to make a new data cable charging problem is very slow.Or do not punch into the electricity.So,there are some analysis about USB data cable and  charging cable from Focuses

What is the difference between a USB data cable and a charging line?

The data line can act as a charging line,The charging cable may not be a data cable

Sometimes,when we spend a low price to buy a data cable,Found it can only charge,Can not transfer data.What is the reason?

Let us observe USB contacts of the role of each contact at first.When observing, The USB head should be facing toward ,There are contact cards that face up,From left to right,The functions of the lines that are connected by the contacts are:Ground wire,Read the data line,Write data lines,+ 5V line.

Generally in order to save costs,Charging lines can save the middle of the two lines.just to delete the read data lines and write data lines,There is no data read and write capabilities,Only charge.

The original data line is more expensive prices,Cheap data cable has became the best choice,Not only design than the original good-looking, there are many small designs so that it is very convenient to use.

 Seemingly beautiful,In fact, these roadside 1 $ of poor quality data lines will greatly reduce the life of the phone,Sometimes the phone is broken you will not know the data line is the culprit.