The two are pretty much the same.
The use of genuine matching charger is the best charging choice, other such as computers or charging treasure (mobile power) are not as good as it, the battery charge and discharge times are limited, no matter how fast or slow there will be damage (very small). Be careful not to fill up when charging fast, which may lead to overcharging, and it will cause serious damage to the battery.
Extended information:
Drop background program\/Power off charge\/Airplane mode charge
After the phone is turned on, various programs have been running, which will consume more electricity, and naturally drag the \"charging rate\". So try to turn off some apps and turn off the screen while charging. Of course, if you can shut down or switch to \"airplane mode\
Personally feel fast charge good point, mainly to save trouble and convenience.
As long as we use Apple's original or MFI-certified C to L cable, 20w fast charge will not harm the battery of Apple xr.
The third-party certification line has been strictly controlled by Apple officials in terms of product appearance, performance, quality, compatibility, etc., and has an overvoltage and overcurrent protection mechanism under the support of the original chip, so there is no need to worry about hurting the phone.
An uncertified data cable is not compatible with all iOS systems, does not have the over-voltage protection of the original chip, and may suddenly pop up one day and cannot be used, or it may cause damage to the battery of the charging device.