Power adapters are widely used in various industries, such as POS, cash registers, intelligent security, commercial display advertising machines, face recognition intelligence, scanners, etc. Different products on the face of the power adapter DC size requirements are different, the type of DC head can be roughly divided into the following:

1, 2.5*0.7(outer diameter * inner diameter, the same below): referred to as DC2507 is mainly used in tablet computers and other small electronic products with limited volume, mini electronic products, etc. Most of the big brands of tablets use MicroUSB to charge.

2, 3.5*1.35(DC35135): mainly used for network set-top box, USB HUB external power supply, network camera, LED desk lamp, etc.

3, 4.0*1.7(DC4017): mainly used for mobile DVD, EVD, PSP, some network set-top boxes.

4, 5.5*2.1(DC5521): Currently the most widely used DC round head interface. Surveillance cameras, some set-top boxes, LED stations, digital appliances, printers, scanners, etc.

5, 5.5*2.5(DC5525) is mainly used for slightly larger power equipment. If some laptops, electric cars, etc.

The most commonly used of these are 5.5*2.1 and 5.5*2.5, and this DC head specification power adapter shipments account for more than 95% of our company's shipment rate.