I did that once, and I wished that I could plug my phone in to my iPad to charge it. That didn't work because the iPad uses Apple's proprietary Lightning connec

I did that once, and I wished that I could plug my phone in to my iPad to charge it. That didn't work because the iPad uses Apple's proprietary Lightning connector rather than the standard USB-C. If my iPad had USB-C, I could have plugged my Google Pixel into it with the USB-C to USB-C cable Google gave me. This is another limitation of the iPad — like a computer, but with arbitrary limitations like non-standard ports.