I have several of the original CMG Infinities. Those are my emergency lights. In addition to being built like a tank, the battery lasts forever. Nowhere near as bright as today's LED marvels, but what you want for emergencies is long lasting light and durability. A super-bright thing that only lasts one hour per battery is good for everyday carry where batteries are plentiful and you have house power to charge LiIon's and NiMH's, but IMHO, not for emergencies. You just can't beat those CMG Infinities for emergency backup.