> Rechargeable NiMH (Nickel Metal Hydride) will not run as long as alkalines unless it is very cold. Also NImH batteries have a very high self discharge rate. <

I typically recharge and place them back in the light just before I start riding. This particular light has a different setting for using rechargables and the resulting time for different power levels is listed as different between alkalines and rechargables. Strangely, the difference is listed as much greater at lower levels. At full power, they have the same time listed.

Your light looks really nice, but I was thinking $500+ was expensive - $900 is way out of the question! I'll check that other thread. Thanks.