At the 30 minute point, the 5W adapter provided the least amount, only getting to 17% charge. At the same time, the Qi charger was at 20%, the MagSafe cable was at 31%, and the 20W USB-C cable hit I have several 20W chargers in the home and all with different things hooked up to them like a lightening cable for the wife's 13 Mini, a Apple Watch fast charging puck, a lightening cable to iPad mini, and a single 30 watt charger for my MacBook Air and u then a usb c from iPhone 15 pro hooked up to my 2017 iMac 5K. UDATON USB C Charger, for Apple Watch Charger, USB Charging Block, PD Dual Port Type C Power Adapter Block Cube Brick Compatible for New Apple Watch Series 9 8, Apple iPhone 15/15 Pro/15 Pro Max/14 4.6 out of 5 stars 5,710 This charger outputs 18W at first and drops to 5W upon reaching 80%. Apple's most current 20W charger recharges 62% in 30 minutes, 90% in 60 minutes, and 100% in 1 hour and 22 minutes. It outputs Aug 13, 2022. #3. No surprise, users have been able to do this for years with MacBook Air/Pro. The system won't dip into the battery until it's under load. You can even use an Apple 12W or 5W adapter with USB-A to -C cable and it'll charge. It's only under relatively heavy load that consumption will exceed 30W. Buy USB C Wall Charger Block,iPhone Charger Cube,20W PD Plug Charging Box,Dual Port Power Adapter Compatible with Apple Watch Series 8 7 6 5 4 3 2 Se iwatch iPhone 14 13 12 11 Pro Max SE XS XR X 8 6S Plus: Wall Chargers - Amazon.com FREE DELIVERY possible on eligible purchases Hello AbduJuhair, Thank you for using Apple Support Communities. We understand that you want to know if using a 20W charger for your iPhone XS will affect your battery life. Take a look at the following support article on adapters you can use for your iPhone: Power adapters for iPhone - Apple Support. It is just that fast will not be as fast as with a faster charger. Yes, I use Apple and Samsung chargers interchangeably between my S21 and iPhone 12 and the difference in speed in either direction is not that noticeable (which cannot be said for the difference in generated heat). Plug a S21 into an iPhone "sort of fast" charger and it will say Watch fast charge: Yes Size: 1m cable Weight: 2.6oz (73g) Colors: White Requires USB-C charger: Yes (20W minimum) Apple ships its Watch Magnetic Fast Charger to USB-C Cable with its Watch Series 7 564mAh. The Apple Watch Ultra 2 comes with a 564mAh battery inside. It doesn't deliver much better battery life than the first Apple Watch Ultra, though, and still allows for up to "180 time checks, 180 notifications, 90 minutes of app use, and a 60-minute workout with music playback from Apple Watch via Bluetooth, over the course of 36 hours sFv1.