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If the phone can be turned on normally, the red light flashing when charging means that the current power is low (generally less than 20% will remind), only need to keep the phone charging for a period of time, there will be a red light into a yellow light flashing, when the power reached more than 80%, the light turned green. This is a normal phenomenon,
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If the red light blinks when charging, the battery cannot be charged and the machine cannot be turned on, it may be an aging or faulty battery, a fault in the internal circuit of the mobile phone, a fault in the mainboard chip and other parts.