In more than three hundred years ago, Benjamin Franklin began to catch lightning, opens the people understanding of lightning, also opens the people understanding of electricity, since that time, there are a lot of people also think about how to capture the electricity in storage, so such thing as a battery is produced gradually, indeed, as a very important in the history of the invention, the battery really solved a lot of problems, greatly improve the efficiency of various kinds of life, and the emergence of lithium batteries more makes people understanding of electricity is becoming more and deeper, 18650 lithium-ion battery is to use the longest time, and now there is still a kind of lithium battery, In many places to be able to see the shadow of 18650 lithium batteries, because the battery compared to other battery, advantage is very obvious, and the safety was relatively well, too, even has been used in the large equipment, this article is to introduce the knowledge of 18650 batteries, introduce why there will be a blast18650 lithium batteriesI.