r/ZephyrusM16

Hi everyone, I’m looking for help with a specific charging issue on my 2023 Zephyrus M16 (GU604).

The Issue:

When I plug in my Anker 100W PD charger (Anker Nano A2679) or even a 65W Dell PD charger into the right-side USB-C port, the laptop intermittently cycles between "plugged in" and "on battery" mode after some time.

The left-side USB-C (Thunderbolt 4) port does not have this issue and charges consistently with both chargers.

When it switches, I sometimes notice the screen flicker as it changes refresh rates (e.g., from 240Hz to 60Hz).

I am currently using software to limit my battery charge to 80%, but the cycling happens even before reaching that limit.

What I've Tried/Observed:

Tested multiple chargers: Same behavior with Anker 100W and Dell 65W on the right port.

Cable check: I’m using high-quality 100W+ rated cables.

Port difference: Some users mention the right port is connected to the dGPU while the left is connected to the iGPU.

Has anyone else experienced this specific behavior only on the right port? I’ve read that this might be a protective measure where the charger/port disconnects due to heat under sustained 100W load, or it could be a firmware issue.

Is there a known fix, or is this a limitation of how the right port handles PD compared to the left Thunderbolt port?