I don't generally ride at night, so I use front facing headlights "to be seen", rather than to see at night. For over ten years, I've used Knog headlights, the "Blinder" line of products, and have been very satisfied with the battery life. I'm not sure what type of battery they use, but the one that is ten years old still performs very well, almost as long as the newest, one year old model. They each have a red low battery indicator light that gets my attention. I generally don't run it very long after it comes on, which is why I have two of them to use on longer rides. I use the flashing mode, but you can use both of the double Cree LEDs at once if you're going through a tunnel or are on a dark road.