1. Electrical problems: Insufficient power of the charger is one of the common reasons for slow charging speed. If the output current of the charger used is small and cannot meet the maximum charging current requirements of the battery, the charging speed will be limited. For example, a lithium battery mobile phone that supports fast charging, the original charger output current is 3A, and the charging time will be significantly longer when using a charger with output current of 1A. EverExceed has matching battery chargers to meet your needs.

2. Charging line problem: the quality of the charging line will also affect the charging speed. The charging cable with poor quality may have problems such as too thin core and too large resistance. When the current passes through the charging line, a large voltage drop will be generated on the charging line, resulting in a decrease in the actual charging voltage that reaches the battery, thus slowing down the charging speed.

3. The battery itself: With the use of the battery, there may be some problems inside the battery, such as the increase of the battery internal resistance. The increase of the battery internal resistance will increase the energy loss during the charging process, according to Ohm's law, in the case of a certain charging voltage, the increase of the internal resistance, the charging current will decrease, resulting in a slower charging speed.

solution
1. Check and replace the charger and charging cable: Make sure to use the charger that matches the battery device and has sufficient power. At the same time, choose a charging cable with good quality and a thick core to reduce resistance and voltage drop.
2. Battery maintenance: If the battery internal resistance increases and the battery itself causes the charging speed to be slow, for some replaceable battery equipment, you can consider replacing the new battery. For devices with non-replaceable batteries, you can try to optimize battery performance with some battery calibration software (if available).