The charging speed of the battery is very fast, and charging in over an hour or even less indicates that the charging is complete. After the charging display is completed, unplug the charging plug, and when plugged in, the charging display will continue to charge. After the charging display is completed, the display capacity of the phone's battery will be full, that is, it will only be half used in less than 20 hours (normal use status, not overload use). The first 2 or 3 cells of the phone's battery are very durable, while the last few cells are more durable than the previous ones.

Battery tester, mainly used to detect overcurrent, voltage, capacity, internal resistance, charging, discharge temperature, battery cycle life, and provide graphs. Battery tester, mainly used to detect current, voltage, capacity, internal resistance, temperature, battery cycle life, and provide graphs. The battery tester has multiple channels to choose from. Single point startup, single point control, and simultaneous testing of different models and types of batteries (nickel hydrogen, nickel cadmium, lithium, etc.) are available.