Actually, it's very simple. The battery is not good. The batteries they bring are not very good. The best are nickel-cadmium batteries with very low energy density and a capacity of only a few hundred milliamps. The key is that there are many possibilities. It uses an old battery, so the battery voltage will drop quickly during use, so you cannot use it for a long time.
Actually, there is a very simple way to solve this problem. The most suitable is to replace the outdated mobile phone battery with a small desk lamp, which can be used for more than one period. month on a single charge (about an hour), I changed it myself once, and basically six months passed and it wasn't charged again (it wasn't used during the holidays , and it is). not often used in daily life)
Choose the current sizeFor the lithium battery of the desk lamp, it is generally recommended to choose between 0.5A and 2A. The current in this range can not only guarantee the charging speed, but also extend the life of the lithium battery.
Specifically, if the current is too low, the charging time will be relatively long and this may cause crystallization inside the battery, affecting its lifespan. And if the current is too large, although the charging speed will be faster, it will also cause certain damage to the battery and shorten its life.
Therefore, it is very important to choose the appropriate current size for different desk lamp lithium batteries. If you are not sure which current to choose, you can refer to the instruction manual of the desk lamp lithium battery or consult relevant professionals.
In addition, you must also doPay attention to the ambient temperature when charging the battery and try to keep it between 20°C and 35°C to prevent temperatures that are too high or too low from having harmful effects on the battery. loading and use. At the same time, you should also choose a charger that meets standards and avoid using poor-quality chargers to avoid battery damage.