I got a Sony battery with a Geek Vape Sollo3 mod. In the morning, I put it in the mod, and by noon, when it said 50%, it suddenly showed that I had no battery. This happened for a week. I went to the store, and the guys gave me another one of the same brand without any problem, in its box. I put it in, and again the same thing happened. Then I decided to get this 3500ah one. The battery is okay. It lasts me a day and doesn't die at 50%. I got two more to have, sometimes I need two batteries if I use it at night. I want to emphasize that I've had it for 2 weeks, so I can't have an opinion on reliability in the long run. I will come back for an update

Purchased two together in a package three days ago. After three charges, I didn't even see them reach 3,000 mah, let alone the 3,500 of their nominal capacity. They range around 2,750-2,800 mah. However, according to the code, they are genuine products. We'll see how long these last.

They were purchased for a NITECORE flashlight and look excellent.
They are IMR deep discharge and this is a very big advantage for longevity.
The careful packaging they come in makes a great impression.
The quality of construction is clearly evident.
With a measuring device, they are exactly as they say without any losses.
However, when we talk about batteries of any type, the best judge is time.

After intense use for 4 months on the Voopoo Argus GTII, with vaping at 80-85 watts, I notice that when I charge them in an external charger and then place them in the mod, their percentage is about 92% each, while in the mod they reach 100%. Their performance seems to have dropped slightly noticeably, as they now discharge faster.

Within a week, the performance dropped tremendously. They no longer hold even a 20ml puff at 70 watts. I do not recommend them, not even as a joke

Good batteries .. however, I don't see any difference with the cheaper Samsung 35E ones, neither in terms of usage nor in the capacity that the charger reads.

They are definitely not worth their money. In terms of battery life, they only last a few hours while other cheaper ones last longer. They also lack power

I charge them with about 20% and the charger shows that they reached around 2600. So they are definitely close to the 3500 they claim. I believe 3100-3200. They last all day comfortably from morning until evening on the aspire zelo X with 0.7 resistance at 13w. At 23:00, I still have 30% left. That's with heavy usage... some other batteries I had, probably Samsung, were dead by 21:00. And they claimed to be 3000. Very good choice, they are worth it!

Edit: I always charged them with a nitecore charger and had the above results. I tried charging directly with a cable and had exactly the same results. That's also good.

After one month of use, I am updating with the following:
Using on Geek Vape Aegis 2 mod at 15w with Innokin's 0.8 z-coil, they last about 4-5 days and have around 1000-1300 puffs. These results are after 3 full charge-discharge cycles. They have not been exclusively tested with a DTL atomizer yet. I will provide an update as soon as I have more information.

Good batteries. I use them in an electronic cigarette (2 x 18650), they last 1.5 days at 50W and exactly 1 day at 75W. The only downside is that the capacity is incorrect, as is the case with all batteries in this category. Pay attention to what charger you will use to charge them. The batteries are Li-Mn type or IMR, the charger must be compatible.

I have it for an electronic cigarette. I often forget to charge it. Here I caught a bad sore throat and I had stopped using it for two months and it hadn't decreased at all. With full usage, it easily lasts me ten days.

When I put them in the XTAR X2, the indication was at 20% and relatively quickly went to 40%, so I assume it was over 30% at the beginning. In the end, the indication was around 2320 and 2290 for the 2 batteries in the pack. Logically, the total capacity is therefore close to 3500mAh. I have no complaints. I use them in flashlights.

I think they are good 3300, not 3500. I also want to add that authenticity is something that CANNOT be verified. Imagine that I make fake batteries. I can make them the same size, color, and wording on the side, and I can't copy the authenticity code? From a genuine one that I have bought, I copy the code to 1000 fake batteries, I put them on the market, and everything is super. If I copy the entire product in the code, will I get caught?

After a bad experience with the Sony VTC6 18650 3000mAh batteries, I got these ones and the differences are double... Argus gt with zeus nano 25w (Sony=380 puffs, Efest in the same set 700+ puffs... They also have a scratch check for authenticity and you can check on the website if they are genuine

Very good batteries. I have them in my vape mod and I forget to plug it in. Very satisfied

They last me about 2 days with the Zenith Innokin vaporizer (cigarette-like), at 0.8 resistance and 18w that I use it... I think they should be a little cheaper but nevertheless I am satisfied.