I tried to do a ride last night and right before leaving the house, i wanted to make sure the light would come on. i hit the power button and the light flashes once. the battery died...AGAIN. i've sent this back to niterider once already and the same thing is happening again. i think once i get it back from RMA, im going to sell it. it's a good light but the battery's just not doing it for me. i will use the money to buy a new light, one that's brighter and has no visible wires, it's also much lighter :)
luckily, i had a backup light (knowing me, of course i would have several backups) i ran my Dinotte 5w luxeon which runs on 4 AA batteries (reliable but not much juice). i think i had it on high for about 30 mins before it bugged me that the voltage was dropping. i finished my 22 mile ride nonetheless...just that i couldn't see too much which made things...interesting. the good thing about this light is the flash mode, when the flash mode is activated...EVERYONE knows you're there, pedestrians, cars, bikes, runners they WILL notice you. If this light didn't have a pause after 5 flashes, someone could drop into an epileptic seizure LOL!