I just bought the EF1 and i had a quick question about the light. It says that they use 18650s but all the ones i have been using are not working with the light. It works just fine with the 2 cr123s but not with the 18650s are they wanted the protected ones? I was looking over the manual and have not seen anything saying that it needs to be the protected ones. I was just asking before I start buying new batteries.