In theory, 40W fast charge can charge 27W fast charge mobile phone, but the mobile phone will only charge to its maximum support fast charge power, that is, 27W. Therefore, the use of 40W fast charge 27W fast charge mobile phone will not speed up the charging speed, but may cause the risk of overcharging the mobile phone, so it is recommended to use the original fast charger equipped with the mobile phone to charge.
Yes, 40W fast charge can charge 27W fast charge mobile phone. Although 40W is a higher power fast charge technology, the phone will adjust the power received according to its own charging specifications, so it will not be affected by excessive charger power. Therefore, the use of 40W fast charging appliances for 27W fast charging mobile phones is safe and effective.
Yes, but the power does not match, too much power will damage the battery of the phone.