Some common sense about data cables:
1, the data line transmission rate has nothing to do with its thickness
2, the transmission rate of the card reader and the transmission rate of the data line depends on the interface speed of the card reader and the card. The USB 2.0 interface is 40 times faster than USB1.1, and USB3.0 is 10 times faster than USB 2.0.
3, the memory is faster than the external memory read and write rate because the structure of the memory and the structure of the hard disk comparison. Hard disks and compact disks work in much the same way.
4, the multimedia card reading rate is faster than the card writing rate, which is determined by the flash chip.
Extended information:
Data line classification:
Without IC(central control chip); With IC(central control chip); Special chip.
1, without IC: there is no central control chip, you must plug in the phone computer to recognize the line, the price is cheap.
Typical models: Samsung CDMA series, D500 series; MOTOROLA E398 series, V3 series; Nokia DKU-2; NEC N720 Series; Siemens 65 series and so on.
2, with IC: with the central control chip, the model of the ordinary chip is 2303, 2101, 3116, without inserting the mobile phone computer will recognize the line, because the price of an IC is more than 10 yuan, so the price is more expensive without IC. The working principle of the data cable with a chip is USB to COM, which converts the USB interface into a serial port and displays it on the computer.
Typical models: Samsung E638 series, D418 series; NEC N610 Series; Siemens 25 series, 55 series; SONY Ericsson mobile phone data cable; Panasonic mobile phone data cable; Lenovo mobile phone data cable and so on.
3, special chips: non-ordinary popular chips, special models of chips such as: DKU-5, DCU-11 and so on.
Yellow charging treasure shell is not moldy, the white shell will naturally age yellow for long-term use, the shell can be cleaned with yellowing agent, the plastic shell products will age and turn yellow under long-term use, you can buy yellowing agent to clean the effect quickly, and the white will be restored in half a day, plastic yellowing agent is also called plastic surface reducing agent, referred to as yellowing agent, It is mainly used to refurbish yellowed plastic and rubber shells.
The charging treasure has white and yellow, the general use is oxidation or there is dirt on the surface of the charging treasure will turn yellow, I generally use toothpaste (or vinegar) to wipe, you can change back to white, you can try. Normal operation is not affected