The built-in 5200mAh battery lasts approximately 2 hours at maximum brightness in bi-color mode and up to 4 hours in RGB mode.
Yes, the light can be powered via an external DC power supply (12V 2A) for continuous studio use while charging the internal battery.
No, the YN360 II is not waterproof or weather-sealed. It should be protected from moisture and rain during outdoor shoots.