how to choose a power adapter

According to industry sources, electronic adapters must comply with national mandatory standards. If there are quality defects, electronic equipment will be damaged, and serious or cause fire accidents. Before this, there were 56 kinds of supervision and inspection products in the country, and the qualified rate of checking for 34 products was more than 90%. However, there were still 3 types of spot checks that had a passing rate of less than 80%. In the category of electronic and electrical appliances, 672 batches of products produced by 11 kinds of 672 companies were sampled in the first half of the year, and the pass rate of spot checks was 87.6%, which was 8.3 percentage points higher than that of 2015. Among them, electric blankets, electric ovens and baking utensils, indoor heaters and other products inspection pass rate of more than 90%; hand-held information processing equipment, household electric washing machines, refrigerators and other products inspection pass rate of 90% or less. The quality problem of the power adapter is more prominent. The qualified rate of product spot checks is 77.2%. The main problem is that the radiation harassment project is unqualified. So how can we buy a safe and secure power adapter?

The first point: Choose products with CCC certification. At present, the standards of China's power adapters mainly include GB4943.1-2011 "Information Technology Equipment Security Part 1: General Requirements" and GB8898-2011 "Safety Requirements for Audio, Video, and Similar Electronic Equipment. 》 GB 9254-2008 "Limits and Measurement Methods for Radio Disturbance of Information Technology Equipment" and GB 13837-2003 "Limits and Measurement Methods for Radio Disturbance Characteristics of Sound and Television Broadcasting Receivers and Related Equipment", etc. Consumers can find the manufacturer's information on the adapter nameplate, and then try to check the relevant website for the authenticity and validity of their certificate.

The second point: Check the identification of the power adapter. Qualified products must include information such as the rated input voltage or rated voltage range, symbols of the nature of the power supply, and safety instructions. Consumers should not purchase power adapter products marked with a foreign language.

The third point: Check the specifications of the original adapter. The output voltage must be the same as the original adapter.

The fourth point: Check whether the adapter's interface matches the device.

The fifth point: In terms of price, in general, fit products that comply with mandatory certification are generally not too cheap. The price should be better compared with others. For products of the same power type, it is advisable to use an intermediate price as a reference and then to go up and down.