Don’t waste your time reading.

Seems to be written just to have room for the advertising and the Amazon links to different things they recommend for charging.

Feels like unnecessary worry. The phone are smart enough and battery replacements are a thing if you do keep the phone 2+ years

Besides, if the argument is heat is the issue then surely a 500mW old school charger overnight is precisely the way to go?

Absolute dreck. Here is the level of trustworthy info you'll find in this affiliate marketing piece masquerading as content: "...even though that increase might only be a few degrees above room temperature, doing this overnight, every night, doesn't seem smart to me. So, I've radically changed how I charge my iPhone." [Emphasis mine. Affiliate linkfest follows this stunning revelation that you should change the way you charge your phone because of the shill writer's "feels"...]