Update 02/19/2014: Unfortunately, the product has yet another weakness, so now I can no longer recommend it: The headlight does not work with batteries! The voltage is too low, so that the light right back goes out, even if the batteries are fully charged. This has also with batteries means that the light is much too early. Such a circuit design is no longer appropriate, I have no sympathy for it. Steer clear of this junk!
