Also know, can I use my Apple Watch charger to charge my iPhone XR?
Yes - the Apple 5W USB Power Adapter that comes supplied with Apple Watch can also be used (in conjunction with an Apple or Apple certified Lightning to USB Cable) to charge your iPhone. The Apple Watch Magnetic Charging Cable cannot, of course, be used for that purpose.
Beside above, can I charge my Apple watch with my iPhone charger? No you can not. Apple Watches uses a different charging method than phones with wireless charging uses. That's why Apple Watches doesn't charge on any wireless charger.
Regarding this, can you charge an iPhone XR with a wireless charger?
Apple's latest iPhone models are easier to charge than any previous Apple devices. The iPhone 8 and newer (including the iPhone XS and iPhone XR) support the Qi standard, which offers contact-based "wireless" charging. Qi charging has been around for a few years, so users have a wide variety of options.
Can you charge an Apple watch without the magnetic charger?
It is not possible to charge your Apple Watch using the power in your iPhone or through its accessories. The ideal thing to do is to use the dedicated magnetic charger and cable provided with your Apple Watch for its charging purposes.
