Slow Wattage of Thinkpad T480 Charger

Here are the problems I have with my T480: The Slow Charger warning appears in Windows. I tested several chargers on Windows and Linux that support at least 65W, but Lenovo Vantage and Sensors both state 5V/3A for the charger. The battery charge slowly drains when I do something with heavy load on CPU and slowly goes up when power consumption is minimal (or the laptop is powered off) Whenever I connect the AC adapter, I'll receive a error message during the boot process, saying that the charger wattage is lower than expected. (All drivers and firmwares are up-to-date) I'd tried almost all of t

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