I have owned nearly every upper level brand of rechargeable light on the market, and will say for sure the batteries poop out far too quickly for the money paid. Never received more than two years from one. Only run AA battery operated lights now. Serfas (lifetime warranty) and Blackburn (lifetime warranty) have lower cost AA lights that put out a fair beam and last a good time when using flashing mode, and significantly less time on steady high. Stick will replaceable battery type lights, and let those with deeper pockets go for the gold standard lights.