What's under the wrapper (Sofirn + Thorfire 18650s)

Decided to remove the wrapper from some of my Sofirn and Thorefire branded batteries. I did a search and found speculation as to what was underneath but not definite answers.

Three different batteries (all buttontops)
-Thorefire 3000mah protected 18650 (came as part of a Thorefire C8S kit with batt and charger)
-Sofirn 3000mah unprotected 18650 (purchased from AX seller E-battery Store)
-Sofirn 3400mah protected 18650 (purchased from AX seller E-battery store)


They appear to be all the same battery. DLG brand.
I definitely can’t provide a HJK level review of them. However my MiBoxer C4-12 places them all at +/- 3000mah and .050-.060ohms.

Thought this could be an interesting post and maybe an ongoing thread if others would like to contribute their findings with other batteries.

Thanks Nooner. I’m sure others will chime in.

DLG (德朗能),It’s a battery manufacturer in Shanghai.These cell is very cheap in taobao.Performance is close to LG MH1

Sofirn I consider a good brand. Flashlights are of good quality and cheap. The customer service is great. Put the same accumulator under two wraps and write a different capacity for each one (one much higher than the actual one) as a scam. Same as when Liitokala sells cheap non-branded batteries such as Samsung, Pasasonic, LG etc.

Sofirn seems to have another type of 18650 battery rewrapped just very recently.

Ordered a couple of Sofirn flashlights, and the “Sofirn 3000mAh” 18650 battery’s bottom now has a “ring”
the previous Sofirn 3000mAh 18650s are known to be DLGH “3200mAh” 18650
any idea what OEM battery is the new Sofirn 3000mAh 18650 (with bottom ring)?
maybe BAK WD N18650CK (nominally 2900-3050mAh, depending on which specs) - this also has a similar “bottom ring”

I agree with the above, maybe it’s BAK

Google Drive: link photo Sofirn 18650 3000mAh

Thanks for confirming that it is the BAK N18650CK.

May I ask about the top white (cardboard or plastic) washer - is it glued on the battery or easily removed after unwrapping the battery?

This is a plastic washer, glued very well.

I got the Sofirn BLF-LT1 from Amazon as pack with 4x Sofirn 3000mAh 18650 Button Top batteries.
I was wondering if these batteries are protected or unprotected.

These: https://www.sofirnlight.com/products/2-z01-flashlight-2pcs-3000mah-18650-batteries-button-top

They are unprotected.

The Sofirn 3000mAh battery no longer has the inner wrap, so I wasn’t able to tell if it was the N18650CK. However, mine did not have the inner ring on the negative terminal.

The positive cap has 4 vents, similar to the previous used DLG cell.

Here’s a discharge graph down to 2.5V at 5A.