I have been thinking about getting some of these for my LED lights. Are they worth it or should I stick with primaries. I have done a search of this site but the only posts I could find seemed to indicate users having hit and miss experiences.
it's not the type of question that can be asked "in general" because whether or not an RCR123 is a good solution is per-light specific. Most people want to run them in lights like the P3D, which works fine, but you loose a lot of runtime as the capacity of most RCR123s is about 500-600mAH in reality.