How Devices Decide Which USB-C Charging Power to Use
How Devices Decide Which USB-C Charging Power to Use
A charger and device agree on a supported power level before delivering it.
The charger offers supported voltage and current combinations. The device asks for one that fits its charging electronics and the cable in use.
One adapter may divide available power across ports when several devices connect. Heat and the battery's charge level can also cause the device to request less power during a session.
Read the adapter's per-port and combined ratings. A laptop and phone connected together may see different charging behavior from either device connected alone.
