Originally Posted by
RubeRad
A word of warning; any super-cheap CREE light packages you are likely to find online has a risk of including bad batteries. I am very happy with a flashlight I bought off eBay for I think $27, but a "full charge" of the two 18650 batteries lasts not much longer than half an hour. (That's the bad news. The good news is that the length of my commute is not much longer than half an hour -- and by the time I get near work, the sun is well up and I can switch to energy-saving blinky mode)
It may take a few charge/discharge cycles for the batteries to reach their full potential.