Whether one USB-C cable can charge your laptop and phone at their maximum supported speed comes down to a single word: separately, never at the same instant, but each one perfectly if the cable's own rating covers both.
Quick Answer
Yes, one at a time, because every device negotiates its own ceiling separately. A 5A cable delivers a laptop's full 140W and then a phone's 25W with nothing to change in between, and the R399 Anker 544 is rated above what any phone asks for.
✅ Each device gets its own full negotiation
USB Power Delivery runs a fresh handshake the moment any device connects, with the cable declaring its own current rating and the device requesting whatever power level it actually needs, up to the cable and charger's combined ceiling. A 5A cable from the comprehensive cable range rated for 140W has more than enough headroom to deliver a laptop's full charging speed one moment and a phone's much lower request the next, since the cable's job in either case is simply not to be the limiting factor.
🔄 Switching between devices needs nothing from you
Unplugging a laptop and plugging in a phone on the same cable requires no adjustment on your part; the negotiation simply runs again from scratch the moment the new device connects, settling on whatever power level that specific device requests. This is also true for a tablet, which typically requests somewhere between a phone's lower figure and a laptop's higher one, again handled automatically without any manual step.
🛒 Confirming your cable actually covers both devices
The only real requirement is that the cable's own rating meets or exceeds the higher of your two devices' maximum charging speeds, since a cable can only deliver what it is rated for. Check your laptop's charger rating specifically, since that figure, not the phone's much lower one, is what should determine which class of cable you buy for a household covering both.
Frequently Asked Questions
Does switching a cable between a laptop and a phone wear it out faster?
Not meaningfully more than any other daily use, since the negotiation process itself puts no additional physical stress on the cable beyond ordinary plugging and unplugging.
Can I charge a laptop and a phone from the same cable at the same time?
No, a single USB-C cable connects one source to one device at a time. Charging both simultaneously would need a separate cable or a multi-port charger with its own outputs.
Will a cable rated for my phone also work for my laptop?
Only if that cable's rating meets the laptop's own charging requirement, since a lower-rated cable built for a phone will cap a laptop's charging speed well below what it is otherwise capable of.
Does the order I plug devices in matter?
No. Each connection negotiates independently regardless of what was plugged in previously, so there is no correct order to follow.
Ready to charge every device in the house from one cable?
Buy to your laptop's requirement, and your phone or tablet will always be covered too.