I've probably done 30+ hours of night time riding so far and all the batteries are holding up fine. Heck, those 3 flashlights on the bars are enough for riding at 20mph. Not much faster than 20....which is why I bought that mini USB light.

Also, those 3 flashlights have a wide field of light, so I'm easier to see from off-angle.

And I do accept donations. Cash or check is fine.