The Apple XR uses a standard 5W charger, rather than the fast charging technology that other high-end phones support. The main reason is to reduce costs and reduce battery wear. Fast-charge technology requires higher power chargers, which puts stress on the battery and reduces battery life. Apple has always focused on the long-term battery life, so it is not willing to pursue the short-term benefits of the high power of fast charge technology, but choose to ensure battery life and provide a longer use experience.