1. Battery type and capacity: Different types of batteries have different charging characteristics, and batteries with larger capacity theoretically require longer charging time.
2. Charger power and efficiency: The power of the charger directly affects the charging speed, and the higher the power, the faster the charging speed. Meanwhile, the efficiency of the charger is also a key factor, as an efficient charger can charge the battery with more power in the same amount of time.
3. Charging stage and protection mechanism: The battery charging process is divided into multiple stages, and the charging speed varies in different stages. To ensure battery safety, protective mechanisms such as temperature protection and overcharge protection will be activated during the charging process, which may affect the charging speed.