These are fake cells. The positive pole of a Samsung cell always has 3 connections to the body.
Yours have 4.
Perhaps the counterfeiters wanted theirs to be more robust? 
The positive pole of a Samsung cell will always be 3 whatever for as long as the brand decides to stick to it. I am pretty sure that if the flat tops of genuine Samsung 30B cells were manufactured with that precise four wide lobe shape its performance would not be noticeably different (and pretty sure the counterfeiters would be pleased if Samsung were to cooperate with them this 
way LoL!). What matters here is this single fact: low discharge rate of 30Bs up to 4.2V is 2.5Ah, which is a common figure of lower grade cells. Key difference is their high voltage and ability to cycle up to 4.35V without issue. In fact, thank God these cells have died this way.
My initial testing got me a bit puzzled because the delivered energy was close despite I already knew my measured input voltage didn't make sense. This was due to those cells having slightly more capacity, very much like this, for example:
Just an example, of course (the LGs are 4-lobed cells, by the way). 
Cheers :-)
Not related to OP’s question, but would like to ask about Samsung date code check in the batterybro website.
I got INR18650-35E and INR18650-30Q.
Checking the date code of the 35Es I got (ordered them Nov 2017, but just got them last month Jan 2018), all the 35E in that order are G25 (Feb 2016) while only 1 is GA5 (Oct 2016).
Looks like these are already in stock for over 2 years.
My 30Qs don’t have those codes below the SDI. Does it mean anything?
d_t_a, the Battery Bro Date Code Lookup Tool is just a sort of reverse engineered hack. And if you scroll down to the bottom of the page, you'll find this: “The Panasonic-Sanyo GA, and the Samsung 30Q are both not currently functioning with this tool.”
Cheers :-)
P.S.: quite nice because I am to receive a 6-pack of Samsung 25R cells and they're for a drill.
This cell being discussed is a 30Q so I dont know if it applies to a 30B as far as date code.
I searched but I don’t think any one has cracked the code on the can completely but dates should be the same between wrap and can I would think.
Just a little related update:
Seller is either crooked or being mislead by a crooked supplier. Hope for the highest and best resolution in this regard, which of course is the money back in my account and the seller to reconsider its business policy and partnership. 
Cheers ^:)
Oy… I’m dizzy and seasick after watching the video. :confounded:
’Zat a Mickey Mouse thermometer? I want one!
At least until I can change my DNA and spring forth a thousand Avalokiteśvara style sorry for the discomfort. :-D
Mickey Mouse thermometer that's right. My new Bside/Zotek ZT102 was telling me the room temperature without attached probe so I asked him for 
confirmation (and they agreed on).
Cheers :-)
The seller said you sent a false picture…. :person_facepalming:
Have you check your dmm battery level?
Sometimes dmm just gives very strange reading.
Related: Sony VTC5A 6-pack sale from Turmera Powerflagship store
Definitively smells like crooks. :facepalm:
Full.
Cheers ^:)
So much for the false slogan “We got your back” customer protection nonsense by AliExpress. From what I can gather, AliExpress tend to favor the sellers more than the buyers.
Got 4 disputes so far, all were successful.
How does it work really, Agro? What’s the best evidence that you used to back up your case?
All my cases was packages that wouldn’t arrive. In the ones with tracking that was easy - I could show the item was never sent.
In untracked it was even easier - I said the order was not here, I confirmed that I checked with my local post office and that was it - no evidence needed, I got my money back.
This is as far as things have gone for now. Unfortunately for me, the cells right now are inside a nearby recycling bin as I disposed them :facepalm: quite recently (I have poked inside with a flashlight through its insertion hole, and found a green “Samsung” wrap leaning out).
I am going to make the utmost to get them back so I can put them in my recently acquired Lii-500. Since the cells are damaged, even a NOR test will only last minutes.
This is a legitimate defense of our rights and in any case, I swear to God they'll know. 
Cheers 
By the way:
Related link: https://www.alibaba.com/product-detail/Buy-FST-2600mAh-26EB-1000-Times_60672810048.html
These button tops look very Chang Jiang FST to me, don't you think? :|
Cheers 
https://www.alibaba.com/product-detail/2017-Hot-New-Products-ZH-2600mAh_60673939896.html
Are these also similar?