The protection can make a big difference. I have already tested the Olight “3600mAh”, and EagTac and Keeppower 3500mAh with PCB are on the way.
Yes, these are my main sources. ENERdan (Enerpower) and Fasttech are others.
Unless otherwise noted, I order the batteries as a normal customer and pay for them. Regarding the 30Qs here: #1 and #2 are from nkon.nl, #3-#6 from Fasttech. No noticeable difference.
I only test cells that I find interesting and would use for myself. That is, no noname stuff, only value brands.