Soonfire FD39 USB Rechargeable Bright Bike Light
[FD39]

I prefer this rechargeable flashlight to battery flashlights. While it charges quickly, you have to make sure you click it on when you charge it. Once it's fully charged, you can turn it on, and by clicking on the button near the front end of it, it gets brighter and brighter. It will get warm when used for a while. This flashlight feels sturdy, and I like the little metal clip it has on it. All in all, it's definitely a keeper.