How trustworthy are Sofirn batteries?

[JasonWW]

Well, it seems my memory was a little off. It wasn’t the black 3000mah Sofirn 18650 that DB had, it was the one before that when they had the red labels. So my suspicion that Sofirn is using a different battery might be correct. Judging by this red ones performance, maybe they should go back to it if possible. It seems great!

Below is an excerpt from his review on the Sofirn C8F from Dec 2017.

@DB Custom

They even supplied a charger and a cell, this time an unprotected cell (I know, the label says it’s protected but testing and questions to Tracy proved out they made an error with the printing on this label) I unwrapped it and it appears to be a Samsung 30Q, but it does better than the 30Q’s I have. Bested only by Sony in the form of the VTC4 and VTC5A in my tests.

This might also be a good time to point out that Sofirn has already done the spring bypasses for us! Yes, 22ga wire bypasses already installed at the factory! Nice touch!

Tests? Yep, I tested the light with their cell and with a couple of others to see where they all stood…

……………Sofirn ………………………30Q……………………Sony VTC4

1. 0.552 Lumens……………0.552 Lumens…………0.587 Lumens
2. 37.50 Lumens……………22.29 Lumens…………22.81 Lumens
3. 83.15 Lumens………………82.8 Lumens…………84.53 Lumens
4. 890 Lumens…………….872.85 Lumens…………931.5 Lumens
5. 1338.6 Lumens….…1314.45 Lumens………1400.7 Lumens
6. 3015.3 Lumens…….3018.75 Lumens………3125.7 Lumens
   ….2756.66 at 30 sec……….2691 at 30 sec