From the internal structure of the mobile power supply point of view, mainly consisting of lithium battery protection circuit and PCB board thereof, and the merits of a mobile power supply also reflected by the two parts. From the point of view of both the use of the battery storage capacity main use that type of batteries (3) and the provision of electricity, the battery is difficult to distinguish the pros and cons from the surface up, no one can be sure the batteries between different brands on there must be a huge difference in quality, time-consuming long unless batteries aging test. The secret PCB circuit board responsibilities are more storage electronics products, we all know that memory must use Flash particles, such as marketing to see more of, U disk, SD card, TF card (Micro SD) do not know FLASH Particles with rapid technological development, today's SD card U disk TF card and people in order to meet market demand, increasing capacity, faster, life expectancy is getting longer and longer, but you do not know why Shenzhen factory wholesale SD card, the following famous electronic band with you I understand what is SLC, MLC, TLCSLC, MLC and TLCU disk, SD card, the difference between SLC, MLC, TLC flash memory chips used in MP3 TF card: SLC = Single -Level Cell, namely 1bit / cell, long-life fast, super-expensive price (about MLC 3 times higher than the price) Toshiba SD card factory, about 10 million times Endurance MLC = Multi-Level Cell SD card factories, namely 2bit / cell, the speed of the general life in general, prices in general, about 3000 --- 10000 Endurance TLC = Trinary-Level Cell, namely 3bit / cell, also called Flash manufacturers 8LC, slow short life, cheap, about 500 times Endurance, there is no manufacturer can do 1,000 times. What is SLC? That SLC Single Level Cell. SLC technology is characterized in the floating gate and the oxide film source into thinner, when writing data to the floating gate voltage electric Hejia, then pole, you can eliminate the charge stored by source By this way SD card factory in Shenzhen where you can store an information unit, this technology provides fast programming and read, but this technique is limited by the Silicon efficiency question, it must be made more advanced Enhancement Technology (Process enhancements), in order to enhance the SLC process technology up. What is MLC! MLC architecture has a number of drawbacks, the first is short life, SLC architecture can be written to 100,000 times, while MLC architecture can withstand write about 10,000 times. Shenzhen factory wholesale _SD card SD card _ famous electronic factory is supplied by Shenzhen Electronics Co. famous. Shenzhen famous Electronics Co. (www.my-1688.com) strong, credible, in Shenzhen, Guangdong digital accessories industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead famous electronics into the brilliant and you work for a better future!