2Pack 100W USB C Female to Male Extension Adapter with LED Display for iPad Pro, iPhone 16, 15 Pro Max, MacBook Pro and All USB C Devices

How many watts of power is your device getting from your wall charger? By just clipping this onto the end of your charging cable and plugging it into the USB C port of your device, you can watch how much wattage your device is getting and thus how well your wall charger is doing its job!

These seem to be pretty accurate in terms of how many watts are being drawn to charge the device. They are small, well made, and the LED segments are big and bright enough for old eyes to see clearly. I've been using them on all my charging devices to spot check wattage draw. I especially like the indication of PD to show when USB power delivery protocol is being used. For devices that market they only use the Qi variant of charging, all but one of my devices can also use the PD protocol. Very handy and useful to know to cut out the marketing bs.

I used these toocki adapters (currently a great deal at $13 for two) to test some cables and charging adapters recently.They go inline, so you plug your cable into one end and the other end into your device, or vice versa. They seem to be bidirectional (and I did operate both ways, charging a battery pack from wall adapter and a laptop from the battery pack on the same port) but there's no indicator of direction. I consistently saw 100W performance through it - I did not test data, but it says it will be limited to USB 2.0 speeds.Generally I'm not worried about data when doing charging tests though. Very convenient for quick tests or cable troubleshooting,

Great product

This adapter does nothing but show the current draw in watts. I love it! Very useful information when you need it and this gadget does it really well!

This display is much more easy to read than the display on the alternative at https://www.amazon.com/dp/B0CKRQCL1T?psc=1&ref=ppx_yo2ov_dt_b_product_details

These do exactly what was expected: they attach to a USB-C cable and display the power draw by the attached device in watts. I tested it on several adapters and several cables... and it helps with determining the cable limits as well as the power supply limits. It has allowed me to sort my cables for charging capacity... and I keep one attached to a good USB-C/USB-C cable and one attached to a good USB-A/USB-C cable. It updates power usage during charging as my phone slows down as it gets closer to full and it turns off when there is no longer a power draw.I am rating it four stars as it works as expected with minimal effort. As always, your mileage and preferences may vary...

This device will tell you how much wattage is being use while charging a device. This is great for testing some cables, but it doesn't telling amperage which is also an important factor when charging devices. So cool things you can learn from this tool how much wattage is being used base off battery percentage and if the wattage changes when the screen is off.