When I plug my phone in the AC charger, it says "charging rapidly" and charges from 20% to 100 for less than 90mins. Is it possible to charge it normally? When I charge it over USB it takes up to 7 hours to fully charge which is too slow. Phone is Pixel XL.
Google Pixel XL allows for slower charging, if a non USB-C adapter is used.
From the support area at Google on the section concerning charging. See the suggestion #2 for your concern:
Which power adapters and cables to use
- Pixel phones use USB-C with USB 2.0 power adapters and cables.
- To charge your Pixel phone with a USB-A power adapter, use a USB-C to USB-A cable. This will charge your Pixel phone more slowly than USB-C.
- Other Android cables and power adapters might not work with Pixel phones.
- Pixel phones can't charge wirelessly.