Buy products with CCC logo, which is "China Compulsory Certification", also known as 3C logo. There is no 3C mark, which means that the product has not been approved by the state and is a counterfeit product. Some mobile power supplies will be marked with CE, which is an EU certification mark. The mobile power supply marked with CE may be imported or copied. Without the 3C logo, the safety of the product may be unreliable.
Second, pay attention to whether there is a small sign similar to "back" next to the charger, indicating whether the charger has double-layer insulation protection function. This is a compulsory authentication measure in disguise. Without double insulation protection function, it is difficult for products to obtain CCC certification. Some will also have a sign of "small house", which means "indoor use only"; If there is a sign "put a cross on the trash can", it means that you can't just throw it into the trash can.
The third is to determine the conversion rate. One of the cores of mobile power supply is the conversion rate. Usually, without professional testing equipment, we can't test the conversion rate of products by ourselves, and we can only know it through advertisements. The conversion rate of general products is 85%, which is already very high. If the nominal conversion rate can exceed 90%, it can basically be determined that it is a false report.
Fourth, determine the positioning of your products. For example, if you are traveling for a long time and backpackers are traveling, you should consider buying large-capacity products. But we cannot blindly pursue overcapacity. The higher the capacity, the greater the risk. If you go out to prevent your mobile phone from running out of power, a medium-sized and compact product will be the first choice. There is also a mobile power supply specially designed for iphone.
Fifth, pay attention to the weight of the product. We often have this experience. Things that are not very heavy will feel unusually heavy if you hold them in your hand for a long time. The same is true for the mobile power supply with the weight of 100g-200g, and it will be a good choice to choose a lighter product with the same capacity.
Sixth, if the price is right, try to choose famous brands. Building a well-known brand requires certain advertising and word of mouth. Look at the brand. Just like mobile phones, the brand of digital products is very important now. Only the brand can guarantee its quality and after-sales, so it is very important. If you buy a low-quality large-capacity mobile power supply, you will often put a time bomb around you.