How to drive a mobile phone without power

From January 10, 2007, Apple officially released the first smartphone iPhone at the MacWorld conference to the current iPhone6 Plus and iPad Air2. It has been 7 years. These products have different functions and appearances. The only thing in common is the built-in battery Users cannot replace it by themselves. Other manufacturers in the industry have followed suit, and more and more mobile devices cannot be replaced with batteries. Even if the battery can be changed, the battery life is still insufficient as the performance-enhancing screen increases.So what if the mobile phone and tablet are out of power while driving? There is a charging product that almost all of my friends who drive have used it, guess what? That's right, it's a USB car charger. Maybe most car owners will think that all manufacturers of such a small thing do the same, just pick one that is not too cheap. However, as the evaluation progressed, charging current false standards, charging heat problems, and the glare of LED small lights affecting driving safety began to appear. So what kind of car charger is good, does the price of the product really affect the product performance? This issue of "YASN Car Quality Inspection Bureau" will evaluate 10 USB car chargers purchased through online channels to see which one is the best.