[qludes]

Just checked the Lenovo PSREF for my MIL-STD-810H certified Zen3+ Thinkpad:

Operating Environment Temperature[1] Operating: 5°C (41°F) to 35°C (95°F) Storage and transportation in original shipping package: -20°C (-4°F ) to 60°C (140°F) Storage without package: 5°C (41°F) to 43°C (109°F) Humidity Operating: 8% to 95% at wet-bulb temperature 23°C (73°F) Storage and transportation: 5% to 95% at wet-bulb temperature 27°C (81°F) Altitude Maximum altitude (without pressurization): 3048 m (10,000 ft) Notes: 1. When you charge the battery, its temperature must be no lower than 10°C (50°F).

So if you're in a really hot climate that might not be enough. Rn it's 31°C here in the shadows and idling SoC temperature is ~45°C.