As we all know, the USB interface has become a standard interface for portable devices including laptops, tablets, and smartphones. The original intention of the USB interface was to provide small power drivers and data transmission for some peripherals of the computer. Therefore, the earliest USB only provided currents of less than 500mA. However, the USB interface has been widely used for charging power of various portable devices. The USB provides current capacity up to 1A, and some USB ports can supply 1.5A. With the popularity of large-screen, multi-core, and compatible wireless phones, the battery capacity of mobile phones has become higher and higher. The phone is equipped with 3000mhA, 4000mAh battery is nothing new, the battery capacity of the tablet is even as high as 8000mAh, 9000mAh. If you use the 1A USB interface for charging, it will take several hours or even ten hours to fill these devices, which will cause great inconvenience to the contemporary fast-paced life! Does raising the supply current of the USB interface completely solve the above problems? First, most mobile phones use a "mini" USB interface. The current through this interface cannot exceed 2A, and a larger current requires a thicker, better-quality USB cable. By the way, if the USB cable or charger is very hot during charging, it means that your charger or USB cable cannot withstand the current charging current of the mobile phone, please be sure to replace it! The latest version of the USB PD 2.0 version uses the USB interface of type C. This interface can withstand 5A of current, and USB PD 2.0 not only boosts the current, but also boosts the voltage to a maximum of 20V, so that the maximum power can be as high as 100W, 10 times now 5V, 2A, 10W. The table below lists the voltage and current supply capabilities of the new USB PD 2.0 version. Of course, the USB cable of the USB PD 2.0 must also be able to withstand 5A or 100W. Obviously, charging with the latest standard USB can greatly shorten the charging time of mobile phones, tablets and other devices. From this point of view, I personally hope that the new USB standard equipment will be promoted and popularized as soon as possible! This Automation curtain is specially designed for automation industry. SDKELI LSC2 light curtain is designed for automation field, with small size, compact structure and strong anti-interference ability, and the product meets IEC 61496-2 standards. The Automatic Light Curtain is with reliable quality and very competitive price. It has been used in many factories and has replaced curtains from Sick, Omron, Banner, Keyence, etc. Automatic Light Curtain,Laser Light Curtain,Automation Light Beam Sensor,Automatic Infrared Beam Sensor,Infrared Beam Curttain Sensor,Infrared Beam Sensor Jining KeLi Photoelectronic Industrial Co.,Ltd , https://www.sdkelien.com