Macbook Pro M1 Max charge with USB C?

the chunky block that plugs into the wall, that Apple sells to run your Mac is called a Power Adapter for good reason. The CHARGER is inside your Mac.

The amount of power available from a USB-A power supply (Likely 0.9 Amps, or 4.5 Watts maximum, your Mac wants 80 to 100 Watts) and the voltage (Likely 5 volts ONLY, your Mac wants to negotiate 20 Volts using USB-C Power Delivery Protocol, not supported over USB-A) is probably enough to run your phone, maybe even charge your phone at the same time. Your Mac demands about ten times more than that to charge. That is unlikely to to be very productive.

<< thought of using a USB-A to USB-C cable to do this. >.

Great thought, BUT. That is not likely to be able to make a noticeable difference in your Mac. As readers are trying to tell you, that port like that can supply around 2.5 Watts, and what you need is more than TWENTY times more -- in excess of 50 Watts -- to make a difference, preferably Forty times more, 100 watts, to charge pleasantly.

A power-brick sized thing is about the smallest-sized source of continuous 100-ish Watts power, unless you invest in a high-end Power Bank -- but most of those can't supply enough power to charge your Mac at all, and the few that can, can't charge your Mac more than once.

I'd suggest bringing along a proper USB-C power brick. What happens if you get out on your trip and discover that a USB-A power source charges your Mac way too slowly to be useful?

Note that if you are using a wall-powered

• USB-C dock
• Thunderbolt dock
• Monitor that connects directly to the Mac using a USB-C to USB-C cable
• Monitor that connects directly to the Mac using a Thunderbolt cable

in either location, that device might be willing to offer power to, and charge, your MBP. I don't know what setups you're using in your two locations, and thus, whether you might already have one of these other power sources – without knowing it.

Charge your MacBook Air or MacBook Pro - Apple Support

You can charge your MacBook Pro using either MagSafe 3 or USB-C. I would not recommend charging it using a USB-A power supply. Not that I would expect this to harm anything – but your MacBook Pro might not charge all that fast, if at all.

There are two types of USB-C power:

• Traditional 5V power. This is the type that you see both on USB-A and on USB-C. USB 2.0 host ports will offer 2.5 watts of it (500 mA @ 5V). USB 3.0 host ports will offer 4.5 watts of it (900 mA @ 5V). I think that USB-C cables are supposed to be able to safely carry 15 watts of it (3 A @ 5V).
• Negotiated Power Delivery power. The original version allowed delivery of up to 5 A at up to 20 V (100 watts). The current version allows delivery of up to 5 A at up to 48 V (240 watts). I believe that if you use the USB-C ports on a M1 {Pro/Max} MBP to charge, the applicable standard is the original one, and the notebook will not negotiate charging power in excess of 100 watts. (The 16" M1 {Pro/Max} MBP requires the combination of an Apple 140W USB-C power brick and a MagSafe 3 charging cable to fast-charge, even though it can charge at normal speed over a USB-C port.)

If your M1 {Pro/Max} MBP is a 14" one, it would have come with a 67W, 70W, or 96W charger. If it is a 16" one, it would have come with a 140W charger.

Identify your Mac power adapter - Apple Support