Power banks on the market are getting thinner and thinner, but will you really choose? This article teaches you to avoid pitfalls from three dimensions: first, look at "protocol compatibility", whether it supports the mainstream fast charging protocols of Apple and Android; Second, looking at the "temperature control performance", the ultra-thin body has a small heat dissipation area, and the temperature control technology directly affects charging safety and battery life; Third, look at the "actual capacity", be wary of false standard traps, and learn to convert the rated capacity. If you want to buy an ultra-thin power bank that is both stylish and practical, it is not too late to make a decision after reading this article.