Seems like the Planet Bike 2W is the way to go here, but that's pretty old now, and with LED tech progressing so quickly, I wanted to see if there was anything I'm missing. I've used li-ion battery pack lights before, but the self discharge rates are terrible. Leave it in your bag for 3 days and you're riding home in the dark. And I don't _really_ need 600 lumens just to ride on lighted streets (though that kind of light is fun, haha). I guess the 3v limit of two AA batteries is what's keeping these lights from really being bright, since 4400+ milliamp hours from 2 AA batteries is more than enough power to pump out huge amounts of light (and a higher capacity than many rechargeable lights). Anyway, thanks for any suggestions!