My new toy is a USB-C cable with a built-in power meter
While I’m waiting for the adapter that’ll turn my DeWalt power tool batteries into a powerful laptop charger, I thought I might introduce you to another intriguing USB-C trend. You can now buy $20 USB-C cables that come complete with their own wattage meter, letting you see just how fast they’re charging your devices.
I bought mine a month ago — it took its sweet time getting here — but so far, I’m impressed! For the past couple of days, I’ve been plugging it into everything to see how much it draws: 18W for my V2 Nintendo Switch, 30-31W for my DJI Mini 2 drone, 2.5-3W for one of my PS5’s DualSense controllers, 54-65W for my XPS 15, all the way up to 99W for a 14-inch M1 MacBook Pro or a Skydio 2 drone. Or, down to 0.5W while trickle-charging the Wyze Buds Pro.
On Amazon, the cables are largely sold by an alphabet-soup collection of brands like “WOTOBEUS,” “URVNS” and “CHIPOFY”, but the one I bought feels surprisingly high-quality despite that. The tiny teal screen and shiny reversible connectors are set in a metal head, connected to to a decent-quality braided cable with what feels like a reasonable amount of strain relief — though I haven’t tested its “35,000+ bend lifespan” quite yet.
What I did test is its ability to measure power, plugging it into literally every USB-C device my family owns, including an array of chargers. Using a Kill-A-Watt and a separate, detachable USB-C power meter as the baseline, I checked both its accuracy and whether it could charge my devices properly, compared to other cables.
In most cases, it was right on the money, with a few important caveats:
The biggest caveat, though, is that this is NOT a high-speed data cable; it’s only suitable for high-speed charging. The transfer rate tops out at the old USB 2.0 speed of 480 Mbps, a far cry from the 5Gbps or 10Gbps you can get with USB 3.1. With a good short SuperSpeed cable, I was able to transfer a 5GB file to my PC from an external SSD in just 17 seconds. This charge cable took a full two minutes longer (2:17) to complete the same task, bottlenecked to just 40MB / second.
That seems to be a limitation of these early cables, unfortunately, as all of them advertise that low speed — even this new bidirectional j5create one that adds some other handy features onscreen. Meanwhile, the standalone USB-C power meter I bought several years ago lets me transfer data at full speed without issues.
None of that’s quite enough to sour me on this cable, because I didn’t have a nice, long charge cable capable of both USB 3 data rates and 100W charging to begin with, and I appreciate not needing to keep track of a meter dongle anymore. I’m fine just using it for charging and pairing a different cable with my SSD. But if you’re truly a USB-C PD connoisseur, I’d probably suggest you pick a standalone meter instead.
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