What's the difference between Android's Qi2 And Qi2.2 wireless charging?

Here's everything you need to know about the current wireless charging standards.

Here&#39;s everything you need to know about the current wireless charging standards. <p><img src="https://www.engadget.com/img/gallery/whats-the-difference-between-androids-qi2-and-qi2-2-wireless-charging/intro-1786719764.jpg" /></p>