I disagree with keep adding more lights. That's just more lights I have to take off when I get to school/work, reattach, and more weight to my bike. If I did get an external battery light I wish I could bolt the light itself to the bike and then simply just take the battery but I have one hole on the front of my frame just above the fork. Unfortunately every light I have seen that is bright enough for me is either clipped on or strapped on.