We have a misunderstanding of mobile power, is there a wood?
According to Battery.com.cn, many small partners are now using mobile power, and are ready to use mobile power to charge low-powered mobile phones or tablets. However, there are many things that seem quite simple for mobile power. Correct understanding. Although many incorrect ideas will not cause any harm, there are still some losses. 1, flat, soft battery is a polymer Many small partners think that the flat, thin looks are polymer lithium batteries. Actually: the idea is wrong. The polymer can be made into a thin, flat shape, but this is not necessarily a polymer battery. The mobile power that everyone is currently exposed to is rarely polymer. Why: What aluminum foil cells that are not 18650 aluminum and iron shells are actually not really polymer batteries. Accurately speaking, it should be a soft-packed lithium-ion battery. The cathode material used is mainly LiCoO2, LiNiO2 and LiMnO2, and the material of the 18650 core of the columnar metal shell is the same. 2, 18650 is easier to explode, less safe Many small partners believe that the cylindrical core of the metal shell is more likely to explode, looks like a "two kick", and the power is definitely greater. In fact: the lithium-ion 18650 battery of this metal shell has a bleed valve device, and it has been deflated when the gas inside reaches the explosion threshold. Of course, this is genuine. If it is fake and abandoned, it is a "two kicks." The lithium battery explosion started from the inside. The explosion caused by the lithium battery will explode because the water and other liquid substances inside are heated by high temperature and high pressure for a short time. With the vent valve, this condition will not occur. Explosive conditions can be formed unless an internal short circuit occurs. It will not explode but will catch fire: the electrolyte inside the lithium battery evaporates and leaks through the battery drain valve, which produces a jet flame and is also very dangerous. 3, the mobile phone uses no power and then uses mobile power to charge Many small partners believe that the mobile phone should be recharged when it is turned off, which is good for the battery and saves power. In fact: On the contrary, the mobile phone battery is exhausted, and then charging with the mobile power will cause the charging current to rise, generate more unnecessary heat, and more electricity. 4, the mobile power will explode when heated Many small partners think that this mobile power supply is too hot to explode, and rush to run? In fact: the mobile power supply is not enough to make the mobile power supply explode. Generally, the mobile power supply can reach 60 degrees, which does not allow the mobile power supply to explode. How to explode: a closed internal short circuit can cause the battery to generate high temperature for a short time and let the internal liquid and a small amount of moisture become gas, forming a high temperature and high pressure, causing an explosion. This happens at most on inferior batteries, so using a genuine lithium battery is the most effective way to ensure that no danger occurs. 5. The relationship between the conversion rate and the voltage Many small partners believe that: mobile power from 3.7V to 5V, the conversion rate will not be higher than 3.75 = 74%, so publicity 80%, 90% conversion rate is false. In fact: the conversion rate is calculated as the energy conversion rate, because the battery of the mobile phone is also 3.7V, so the energy conversion rate is more suitable. The conversion rate formula is: (actual discharge capacity × average discharge voltage) / (nominal cell capacity × cell voltage) = conversion efficiency. Why: Why use energy instead of electricity? Because the output voltage of many mobile power sources is too low, and the amount of electricity discharged is relatively high, so it is cheaper when calculating the actual discharge capacity, and the energy conversion rate is more telling. 6, high current output charging speed Many small partners believe that the output current of 2.1A is definitely faster than that of 1A, which is like the faucet with a large tap. In fact: during the charging process, the charging current depends on the device being charged, so even if we use a mobile phone with a nominal charging of 5V/1A to connect to the 5V/2.1A output port of the mobile power supply, the charging speed is not Will be faster than the 5V/1A output interface. Why: The protection measures of the mobile phone will limit the current input according to safety considerations, which is also a way to avoid overheating the mobile phone. How do we choose the charging current: regular electronic devices will indicate the standard input voltage and current, preferably with the original charger and genuine mobile power. When charging, it must be matched with current and voltage to charge. to sum up: Although mobile power, as well as mobile phones, are now commonplace, many times the use of these products has become careless, but the devil is in the details. As we inadvertently, it often causes some harm. Although the mobile power supply is not easy to explode, it is not uncommon to smoke and catch fire. There are not many people who have an accidental overheating charge. However, if a combination of inferior charger and inferior power supply is encountered, it is inevitable that there will be no problem. Can Making Machine,Tin Can Welding Machine,Tin Can Production Machine,Aluminum Can Sealer Machine Zhoushan Golden Pard Machinery Co., Ltd.  , https://www.goldenpardmachines.com
Not all flat batteries are polymer batteries 
The most common 18650 battery 
In fact, you don’t have to wait until the phone’s power is running out to charge your phone. 
The frontal temperature of the mobile power supply is less than 60 degrees during discharge. 
Mobile power conversion rate 
5V/2.1A output interface