At present, the national standard "GB4943-2001: the safety of information technology and equipment" and "GB8898-2001: audio, video and similar electronic equipment safety requirements" are used as their quality assessment standards respectively according to the different electronic and electrical equipment, such as the power adapters supporting the information equipment such as notebook computers and cellular phones. According to the requirements of GB 4943, the power adapter for audio and video equipment such as language repeater and Walkman should meet the requirements of GB 8898.
The following are the main performance criteria specified in several standards:
1. Rated output current 2, rated output voltage
3, marking and instructions 4, power plug size 5, electric shock under normal working conditions.
6, normal work fever 7, failure condition 8, mechanical strength
Buy the charger correctly:
As the saying goes: iron still needs to be hard. When we choose to buy chargers, we can not covet cheap and bury hidden dangers.
(1) to choose and purchase commodities produced by regular manufacturers.
(2) purchase products with "CQC", "3C" or other certification marks.
(3) purchase mobile phone charger with original mobile phone.
(4) look at the appearance of charger, such as whether the seams of the shell are fine and neat.
Charger working environment:
(1) waterproof and moisture-proof. (do not use chargers near bathtubs, washbasins, water sources, etc.) or in damp basement. )
(2), anti cooling and exothermic. (high temperature shortens the life of electronic devices and causes plastic parts to deform or melt. Undercooling causes moisture inside the charger and destroys circuit boards. )
(3) to prevent the shock from falling. (electronic components damage will burn the circuit board, the shell is damaged, there is electric shock danger. )
Do not use the wet hand to plug the charger, otherwise it may cause electric shock.