Help choose a budget light for daily commute on a bicycle

Would the Panasonic NCR18650B Protected batteries, discussed here

be a good choice for this flashlight?

Is this much different from the one suggested by Bort?

From what I read in the battery section of the forum, I think I should go for protected cells.

I don’t see any way to differentiate between all the batteries. How do you tell which ones are good and which ones are fakes?

Thanks for the help.