If they charged it without plugging into the laptops, then it would have been a charger, but in your example, the laptop is actually the charger. If you had corrected a layperson the exact same way the people are doing here, I agree it would have been impolite, but because this is supposed to be a technical site, there is some justification for their reactions.I have provided mine to people in many meetings that pointed to this thing and asked to borrow "my phone charger." They plugged it into their laptops to charge their phones. I'll go tell them they were wrong, and that you were right, and that they weren't actually charging their phones at all. Please know this is my utmost priority for the day.
“The ChargeKey is a pocketable charger that attaches to a keychain” is a misrepresentation, whereas “The ChargeKey is a pocketable cable that attaches to a keychain” would actually be accurate. It is perfectly valid to hold a published article to the standard of being at least technically accurate on a technology website. There appears to be a lot of hate on this site for products that I can see at least some purpose for, and this one seems a bit pricy, but at least potentially handy. That said, it would likely have gotten less vitriol if the author had been more accurate in their representation… as soon as I read that sentence, I made some popcorn to watch the fireworks.