I've been all-in on usb-c for a long time, and have made a hobby of updating old devices to usb-c instead of microusb and in some cases adding li-ion cells. My

I've been all-in on usb-c for a long time, and have made a hobby of updating old devices to usb-c instead of microusb and in some cases adding li-ion cells. My favorite things so far is updating all of my retro consoles to usb-c power input and adding usb-c charging and a li-ion cell to my favorite keyboard, the 4th gen Apple wireless keyboard[1]. It has a bit more travel than the non-butterfly macbook keyboards. At one point I bought all US layout versions I could find in my country. I have about 10, some new in the box, which should be a lifetime supply. Unfortunately, like another poster said, many usb-c devices are not compliant and only charge with an "a-c" cable. This is because usb-a defaults to 5V power, but usb-c defaults to no power output without negotiation or CC resistors. If you are in a pinch, a usb c-a adapter plus a usb a-c cable does work. In my experience these use the cheapest possible usb-c connectors that don't expose the CC pins, so to fix them, you need to remove the connector and install a new one. See [3] for power only and [4] for power+data. Anyway, I always like to share 3 cheap products for anyone interested in upgrading devices to usb-c charging or connectivity. Since these are available from many aliexpress sellers but the actual listings come and go I will share search terms which hopefully work 1+ years from now. - usb-c charging PCB for a lithium ion cell[2] - usb-c connector with integrated 5.1kohm resistors, to easily use usb-c for 5V power without data.[3] - usb-c connector with just enough pins for adding CC resistors and connecting to power and usb 2 data lines in an existing product, but without all the additional pins for usb3 and thunderbolt (because this makes it very difficult for a hobbyist to solder it in place without bridging pins). Unfortunately I don't know of a product with CC resistors + power pins + data pins so you do have to add CC resistors yourself.[4] - small PCB with a chip to negotiate more than 5V (9V, 12V, 15V, 20V). Some of these offer fixed voltage and some are configurable.[5] [1] https://en.wikipedia.org/wiki/Apple_Wireless_Keyboard#/media/File:Apple-wireless-keyboard-aluminum-2007-side-view.jpg https://en.wikipedia.org/wiki/Apple_Wireless_Keyboard#/media... [2] "Ultra-mini Type-C USB Charger Module DC 5V 1A Charging Board" [3] "USB 3.1 Waterproof Type-C Connector 16PIN 5A Female Socket Double 5.1K Resistor Support Charging And Discharging" [4] "Micro USB-3.1 SMD 16P type-c Female Connector Socket" [5] "usb-c decoy module"