The charging time of lithium batteries depends on multiple factors, including battery capacity, charger power, and battery health status. Generally speaking, the charging time of lithium batteries is between 3-5 hours.

Firstly, the capacity of the battery is an important factor affecting the charging time. The larger the battery capacity, the longer the charging time required. For example, a 2000mAh battery may take twice as long to fully charge as a 1000mAh battery.

Secondly, the power of the charger is also a key factor. The higher the power of the charger, the faster the charging speed. For example, a 2A charger charges faster than a 1A charger. That's why fast chargers can fully charge batteries in a short amount of time.

Finally, the health condition of the battery can also affect the charging time. As the battery usage time increases, the charging time of the battery may become longer. This is because the aging of the battery leads to a decrease in battery capacity, which requires longer time to fully charge.

In practical use, there are many other factors that may affect the charging time of lithium batteries. For example, the ambient temperature during charging and the internal management strategy of the battery may all have an impact on the charging time. Therefore, although we can provide a general charging time range, the actual charging time may vary depending on the specific situation. The best way to obtain the most accurate charging time is to refer to the specific information provided by the battery and charger manufacturers.