3 ms·
That's why my stupid flashlight won't charge on some chargers! Thank you, you've solved a mystery for me.
by Miraste 4y ago
That's why my stupid flashlight won't charge on some chargers! Thank you, you've solved a mystery for me.
- vineyardmike 4y ago> won't charge on some chargers To add more detail, USB-PD (power delivery) is a complex negotiated protocol. The charger is supposed to output some meager 5v power supply like a traditional USB A supply, and the device asks for some specific voltage, and the charger tells the device if it can do that, and then does it (up to 24v, iirc). PD Chargers are supposed to support any of the supported voltages, but many (eg. Apple MacBook Chargers) only support a subset of the voltages.
- ProZsolt 4y agoBy spec USB-C chargers don't even provide 5V without a pulldown resistor on the CC lines. It's safe to connect two compliant USB-C charges together.