Originally Posted by
Ziemas
The RC-N3 uses a CR123A battery, which looks like the below photo.
Psst. That's a CR2, not a CR123.
123's are a little longer, but also a bit more common than CR2's (as far as flashlights are concerned anyway)
My wife uses a couple of Inova Bolt 2AA's on lockblocks. Not as bright as the XR-E lights, but they've been rock solid dependable for her on daily commutes.
This weekend I'm gonna try out a Coleman MAX 2AA XR-E light on a night ride. If it turns out well, you could get two and lockblocks for just a touch over $50.