1. Look for big brands
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Because the entry threshold of the car charger industry is relatively low, the market is full of many uneven car charger products, so try not to choose the brand you have not heard of when buying, the quality of the big brand products is more guaranteed, will have over voltage, over current, overheating, short circuit protection and other functions, and it is safer to use.
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2, look at the material and design
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Common materials are plastic (must be flame retardant material) and metal two kinds, although there is no superior points, but the metal car charger often has a higher level in design, such as the use of CNC, polishing, radium carving, electroplating and other processes, so the overall appearance level is a higher grade, feel much better, of course, the price will be obviously more expensive.
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3, fast charging is essential
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Now the mobile phone supports more and more fast charging, although the car charger is only to meet the fragmented charging needs, the speed is also the faster the better, if the charging is too slow, the mobile phone navigation when the charge is not even enough power consumption. Whether it supports fast charging mainly depends on its output parameters, 5V\/1A, 5V\/2.1A, 5V\/2.4A are very common, mainly to see whether it supports QC3.0 and other fast charging protocols. Some car chargers both USB ports support fast charging, some only one support fast charging, you can choose on demand.