We can also check the performance of the charger during use. It is normal for the battery to have a slight temperature rise in the later stage of charging, but if the battery is obviously hot, it means that the charger failed to detect that the battery is saturated in time, causing overcharge, which is unfavorable for the battery life.
Although many chargers do not overcharge, there is a problem of insufficient charging, which is directly caused by a short battery discharge time, that is, a short standby time of the mobile phone. Users who use the original random new battery can compare the approximate reference time provided in the manual and compare it. If there is a clear gap between the reference value and the actual use, there is reason to suspect the charger problem, and of course the battery quality and mobile phone use are not excluded. Other factors such as the environment.