The Xeno E03 costs less than 30 bucks, is extremely well made and uses a single cell. I once was with a group of 5 riders and was the only one with a light when we wound up riding well past sunset, I had 5 abreast with me in the middle all riding with my single Xeno E03. It has a nice wide pattern and is incredibly bright for a single AA. (It uses AAs or rechargeable 14550 cells which are a lot brighter that the AAs.)