According to the author's understanding, the safer statement is mainly from the Taobao cottage mobile power supply manufacturers, as a selling point attack using 18650 batteries.
　　 Everyone can use "battery explosion" as the key word, the mother's main news is related to mobile phones, and now the mobile phone has not found a non-model, so the polymer lithium battery is more than the 18650 lithium battery. The statement of security is untenable, and there is no such thing as an absolute explosion. In addition to individual extreme explosion cases, the bulging phenomenon is almost a common problem of polymer lithium batteries.
　　 Of course, the polymer square cell has its unique and 18650 (cylindrical) lithium battery is completely irreplaceable: square flat, which makes it a big player in thin and portable electronic devices, in addition to the highly dependent mobile phones, ultra-thin Polymer square cells are also used in the notebook. Whether its security is high or low, as long as we can't do without the phone, it's in your hand or in your trouser pocket. Fortunately, the star models of mainstream mobile phone brands are almost all Japanese and Korean batteries. They are all from international companies. The overall security is very high. You don't have to worry about this for everyday use.
　　 Turning back to the 18650 lithium battery, this "old" battery, which is often attacked by various cottage mobile power manufacturers, is still widely used in various electronic devices, such as mobile power. In fact, in high-end applications, such as professional imaging equipment, laptop batteries, 18650 has been the main role, the large-scale application of Tesla electric vehicles has improved the high security image of this battery. The 18650 lithium battery has mature technology, good consistency and high capacity density. It has the advantage that polymer square batteries cannot be replaced in large-capacity hybrid applications.
　　 So, what choices should we make when we need to consider the type of battery in our daily lives? Or take mobile power as an example, the personal point of view is: choose a well-known battery supplier's products, such as: SANYO, Panasonic, SONY, Samsung, LG, domestic Lishen, BAK, Changjiang, Zhuoneng, etc. also have a certain scale of strength The brand, security also has a relatively high guarantee. The safety of the battery is mainly controlled by the quality of the manufacturer, not whether it is a polymer or a normal lithium battery.
　　 By the way, a widely accepted misconception is made that polymer square cells do not mean thinner, lighter or thicker, and are always closely related to energy density, whether the battery is cylindrical or square, during the same period, the same capacity There is no significant difference in the volumetric weight of the polymer lithium battery and the 18650 lithium battery.