OK, just checked the internet. If your light was designed to run on standard batteries it's light output will be diminished by 20% using rechargeables, period! A standard alkaline's rated 1.5volts is 25% greater than an eneloop's 1.2volts, is this acceptable to most here? If you are running rechargeables in your light, switching to alkalines will greatly increase your light's output. I think I'll stay with the trusted and true battery until someone gets their act together and manufactures a real replacement. Try running anything with a motor (portable CD player for instance) with a rechargeable and see what happens. Years ago my son was highly displeased when on his 4th Christmas his new battery operated train would only run without the cars attached because Daddy wanted to save money. After reading some of the posts here extolling the eneloop battery I was hoping this meant something had changed, but sadly I was mistaken.

I also read on hear that an 18650 was equal to 3AAA batteries, this is completely false. The 18650's rated output is 3.7volts, 3AAA's will put out 4.5volts, about 22% more. Again, the light will emit more lumens with the AAA's.

Found these on ebay for $8.99, free shipping. Cree 5watt, all aluminum housing, 270 lumens, 3AAA batteries required. Comes with a rear light as well so I ordered 2, I'll let you know how they work.