At present, according to the different supporting electronic and electrical equipment, the power adapter adopts the national standards GB4943-2001: safety of information technology equipment and GB8898-2001: Safety requirements for audio, video and similar electronic equipment as its quality assessment standards. For example, the power adapter supporting notebook computers, cellular phones and other information equipment shall meet the requirements of national standard gb4943, including audio, video and Walkman The power adapter matched with video equipment shall meet the requirements of national standard gb8898. The following describes the main performance indicators specified in several standards:
Rated output current 2. Rated output voltage
3. Marking and instructions for use 4. Size of power plug 5. Risk of electric shock under normal working conditions
6. Normal working heating 7. Fault condition 8. Mechanical strength
Choose charger correctly:
As the saying goes: it needs to be hard to make iron. When we buy chargers, we can't be greedy for cheap, so as to bury potential safety hazards.
(1) Purchase goods produced by regular manufacturers.
(2) Purchase products with "CQC", "3C" or other certification marks.
(3) Purchase the original mobile phone charger of your own mobile phone.
(4) Look at the appearance of the charger, such as whether the seam of the shell is fine and tidy.
Charger working environment:
(1) Waterproof and moisture-proof. (do not use chargers near bathtubs, washbasins, and other water sources, or in wet basements.)
(2) Prevent cold and heat release. (high temperature will shorten the life of electronic devices and deform or melt plastic parts. Supercooling will form moisture inside the charger and destroy the circuit board.)
(3) Anti falling and shockproof. (damage to electronic components will burn the circuit board, and damage to the shell is a risk of electric shock.)
Do not plug and unplug the charger with wet hands, otherwise it may cause electric shock injury.
