What is an explosion-proof emergency light and what are its parameters?

Patent led explosion-proof emergency light, equipped with 3.7V lithium-ion environmental protection 2200mah battery; Meet the new national explosion-proof standards. Emergency lighting explosion-proof lighting lamp is powered by 3.7V lithium-ion environmental protection 2200mah emergency battery power supply, which can be started immediately when the main power supply is cut off, and can also be controlled by an external switch.