Apple's advertised iPhone charging speeds are currently ... and therefore the charger's wattage, won't be as much of an issue. You will also want to consider how you plan to use the charger ...

Apple quietly added a uniquely-designed wireless charger to its online store. I've never seen anything quite like it.

The second-fastest way to charge your iPhone is with Apple's MagSafe charger and a 20-watt power adapter, but for this to work you must own either an iPhone 12 or later to get the faster 15-watt ...