These USB-C charging cables, from a company you've never heard of, feature a built-in wattage meter that tells you how fast your devices are charging. 6.6 feet long, the cables are braided and supposedly durable.
Sean Hollister over at The Verge rolled the dice and bought one, stating it feels "surprisingly high-quality" and checked them for accuracy, giving them the thumbs-up. He did have some caveats, which you can read at the review.
I think they look cool and am amazed that they exist—but I can't think of a single reason why I'd want to see how fast something was charging. If anything, I wish the cable could tell me how much time my device had left before it becomes, like most tech devices will these days, obsolete and unusable.
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As E. Agle has said, knowing your power draw is pretty important for maker projects. Although most people already have an inline solution for this and they tend to offer more suitable features.
I don't really see the point in this, it's quite a nice design though.
It could be useful to keep an eye at my Raspberry Pi's 24hr power usage, or my new monitor's power usage while changing a laptop.
Admitted, they are a bit nerdy, aren't they?
I think they have a hit now that Europe has made USB-C device charging mandatory.