Can the battery be charged with a universal charger?

As for the LZ problem, just be careful not to deform the battery contacts when charging. Even if they are deformed, just use some sharp tools to fix them, and it will be fine. It is okay to use a universal charger, but you must ensure that the universal charger you buy is a qualified universal charger. There are all kinds of universal chargers on the market now, and some of them are unqualified, so many people say that the battery is damaged. Let me make it simple Let’s talk about some basic principles. Generally, the charging voltage of mobile phone batteries cannot exceed 4.2V. Some unqualified universal chargers do not control the voltage well and continue to charge the battery to 4.2V, which will cause the battery to be damaged. Qualified The universal charger will usually stop charging when it reaches about 4.1~4.2 volts. When it can be charged to 4.2 volts, the battery is the most fully charged. Now it may be due to safety issues. Many mobile phones are designed to be charged directly. Charging will stop when it reaches 4 volts. Therefore, if you use a mobile phone to charge directly, it will not be as full as a cradle charger. Therefore, if you use direct charging, the battery's standby time will of course not be as long as a cradle charger. Some people say that using a mobile phone Direct charging is the best. This is absolutely incorrect, because mobile phone manufacturers are designed for convenience. Usually direct charging takes a shorter time and has a larger charging current, and for safety reasons, the battery will not be charged. It must be fully charged, which will shorten the service life of the lithium battery. The only advantage is to save time. Because the charging current of universal charger or stand charger is small, although the charging time is longer, the charging effect of the battery is better. Generally, the battery can be fully charged, which can extend the service life of the battery. When choosing a universal charger, It is best to choose products from major manufacturers as they have better quality (but even products from major brands may have some problems). If possible, the safest way is to use a multimeter to measure the voltage of the universal charger. After the battery is fully charged, test the voltage of the battery again. As long as the voltage does not exceed 4.2 volts, it is qualified. Batteries that can reach 4.2 volts are ideal. If there is no way to measure it, you can only try it out, or choose a regular manufacturer. It is best to use a universal charger that has a warranty period. If the battery does not generate heat after being fully charged, is fully charged, and is used normally, it can be basically concluded that the universal charger is normal. If you find something abnormal with the battery after charging, you must not use it. If you use that universal charger again, it may damage the battery, so you have to buy another brand.