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Can a 65W charger charge a 30W phone?

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.04.16
Nowadays, everyone's smartphones have already used fast charging. Except for iPhones, the charging efficiency of domestic smartphones has reached over 66W. Nowadays, domestic smartphones have started to focus on fast charging. Recently, when they added a 100W fast charging, Redmi made a 300W fast charging. The fast charging market can be said to be neck to neck competition, with no one letting anyone down.



But some people's mobile phones may not have such high charging efficiency, so can a 65W charger charge a 30W phone?

As for the daily use of mobile phone chargers, mixing them up is already the norm. Manufacturers have already considered this when designing mobile phones, so there is no need to worry too much about it. At present, legitimate chargers are equipped with smart chips that can automatically recognize the power supported by the phone and intelligently allocate the appropriate current.

However, it may not necessarily be fast charging. The charger and phone support the same fast charging protocol for fast charging, otherwise it will be 5V low-power slow charging. It is best to use a fast charging cable that matches the charger. If entering high-power fast charging, the actual power of charging is controlled by the phone, not the charger. The charger can provide 65W, and the phone will control the charging power within 30 W according to its own needs.

For example, the iPhone series uses the USB PD fast charging protocol, and the iPhone 13 supports up to 22W fast charging. Using a 65W USB PD compatible charger can charge the iPhone 13, achieving a maximum charging power of 22W. If the protocol does not match, it will result in inability to charge or a power drop to 5V 1A.
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