Apple's MagSafe, which returned on the iPhone 12 in 2020, turned the back of the phone into prime real estate. Wallets stuck on first, then grips, battery packs, and tripods (we rounded up the early MagSafe accessory wave in 2021), with Qi2 later pulling Android into the same magnetic party. The next resident, apparently, is
I bought a watercooler version that was originally designed for a phone. It works pretty well, but mine is running at 100W.
I put it on the heatpipes for my laptop running local LLMs.