It is not recommended to use a low-power charger to charge a high-power mobile phone, and Android phones should at least use a charger of more than 18W.
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In turn, use a high-power charger to charge a low-power phone, and the charger will automatically adjust the current and voltage to a safe range without any problems.
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There will be no charger overload damage, but a little waste of high-power charger advantages.
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