1, if the battery is not charged, it cannot be opened, and the electric toothbrush still turns very slowly after charging for a few hours, and then stops for a while. This shows that the battery of the electric toothbrush is broken, the battery is generally lithium battery, and the mobile phone is the same, you can find after-sales repair, you can also buy a lithium battery of the same specifications in the place where the electric toothbrush is sold, or buy a new electric toothbrush;
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2, the charger may be broken, you can check whether there is electricity after the charger is plugged in;
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3, the charger and battery are no problem, it may be the internal circuit problem of the toothbrush, such as the line is broken. It is recommended to contact after-sales maintenance;
No, charge two or three hours is almost good, I bought this, a charge can be used for a long time, and then I don't care about the charge, charge will be adjusted