The 2 Panasonic had some reviews from users but the Sanyo had none which really surprise me since I thought Sanyo made some good batteries (Enelloop) ??
I basically want one reliable, durable and not too expensive.
As for the charger, what do you think of the NiteCore I4 version 2, I read lots of good review.
The I4 v2 charger is considered a good charger. It does closely follow the proper charger cc/cv algorithm.
As for a good battery, this discussion has been brought up several times before and does depend on your preference and length can be a issue for some lights.
I recommend protected cells - the Pana PDs are nice. My L2Ps don’t work well with laptop pulls and other unprotected cells because they’re too short to get sufficient spring compression.