Derek Funcks
Senior Member & Supporter
Paul, i suppose it all depends on how bright the light is, the batteries in my energizer last quite a while, but i wouldn,t say it was the brightest of lights. Just got a couple of the CREE LED ones as recommended by Jon. Absolutely amazing power for such a cheap light, filled it with 3 duracell and haven,t stopped messing with it ( i work nights ), so far, it hasn,t lost any power. It also has a halve power mode to safe battery life.