Charging is an important step in using a rechargeable battery. Proper and reasonable charging is good for extending battery life, and improper charging will have a big impact on battery life. Lithium batteries are basically packaged separately according to each product, and are not common to each other. Therefore, each product also provides its own charging device, which is not universal, and can be used only when following the instructions.
Fast charge and slow charge
For example, a No. 5 nickel-metal hydride battery has a capacity of 1200 mAH, and another section has a capacity of 1600 mAH. The capacity of one battery is called 1C. When charging, when the charging current is less than 0.1C, it is called trickle charging. Trickle charging can charge the battery very much without damaging the battery life, but the time spent with trickle charging is too long, so it is rarely used alone, but combined with other charging methods.
When the charging current is between 0.1C and 0.2C, it is called slow charging. The charging current is greater than 0.2C, and less than 0.8C is fast charging. When the charging current is greater than 0.8C, it is called ultra-high speed charging.