Is this a good battery?
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It depends...what power levels or coil resistances are you vaping at/with?
VTC4 is better at high amps, HG2 is better for longer vaping time at 20A or lower.
Check my safety grades table in my blog (link in my signature) to see how they compare at different power levels/coil resistances.
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On an unregulated or regulated mod? With a vw mod the resistance doesn't factor into the amp draw so we'll need to know the watt setting.
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The vtc4 definitely, and I wouldn't go any lower than .14 ohms with that (draws 30 amps - in fact I wouldn't go that low even). And you need to have an extremely accurate resistance reader when venturing that low.
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That is completely untrue and is not what my tests show at all.
The HE2, HG2, and 25R beat the Tesiyi in pulse testing. Both in voltage under load and run time. I haven't done the pulse testing yet but I believe that the VTC5 and HE4 would also be better cells.
You are a manager at Tesiyi and I understand your enthusiasm for your cell but you are doing significant damage to your company's reputation by saying these things.
This is also untrue. The HB2, HB4, and HB6 are true 30A cells.
Yes, you can say that the Tesiyi 40A 2600mAh is the only 25A, or higher, 18650 battery with more than 2000mAh of capacity. But that doesn't mean a lot when there are 20A batteries that outperform the Tesiyi. And while the 1500mAh batteries don't last as long, they all have better voltage under load than the Tesiyi.
The 25A CDR I gave your battery is an indicator of hot the cell gets during use. While it can be one of the performance indicators, it can't be used solely as that. Especially when considering the Tesiyi's only average pulse performance.
I'm not saying the Tesiyi is a bad battery, it's a decent 25A one. I am saying you can't call this the best 18650 battery. Not by a long shot.
Yes, the Tesiyi has about a 17% longer run time than the 20A/2500mAh Samsung 25R. But this is when continuously discharged. When pulsed though the performance of the Tesiyi is lower than the 25R. Both in voltage under load and run time (capacity).
Have you taken a really good look at the discharge graphs I sent and compared them to other cells I've tested? I don't mean to sound disrespectful but none of this should be coming as a surprise.
Have you taken a really good look at the discharge graphs I sent and compared them to other cells I've tested? I don't mean to sound disrespectful but none of this should be coming as a surprise.
Way to set the facts straight, Mooch!
It's troubling when a battery manufacturer manager doesn't understand about battery safety and performance testing as it relates to vaping. It's not all about batteries with the highest mAh (capacity) rating being the top batteries on the market. There are other factors involved that we must take into consideration, as you pointed out so well.
This probably would be a great flashlight battery with low drain requirements, but in a vaping device with a 40 amp draw voltage load, a four second pulse dropping the actual voltage output that low is unacceptable performance-wise in my opinion.
As you said, the Tesiyi isn't a "bad battery", it's a decent 25A one. However, we can't call this the "best 18650 battery". Not by a long shot.
We need whistleblowers such as yourself to keep manufacturers honest and keep us discriminating vapers educated and safe. Keep up the excellent work. It is highly appreciated.
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His test equipment broke down so he couldn't finish the tests. One of the vtc4s vented and in the process the battery sled got damaged so the Tesiyi cells couldn't be tested at the same ohm load.
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Passkat, what is the amp rating of your battery?
What standards or criteria are you using to set the continuous rating up to 30A and the pulse rating up to 55A?
What is the 40A "Max" current rating for if the continuous rating is 25A-30A and the pulse rating is 45A-55A?
If the battery is rated 25A-30A continuous, why does the web site say 40A continuous?
Please reread what I said. The HE2 and, probably, the HE4 have better pulse performance. I wasn't talking about the CDR.
The CDR of a cell can have some effect on the pulse performance but the internal resistance and cell construction also have an effect. Though the Tesiyi has a higher CDR than the HE2 and HE4, that is a safety and cell life rating. It is not a good performance rating. How a cell behaves when pulsed is a performance measure of how good the cell will be when vaping.
Having these types of discussions with people who work for a battery company is very disturbing to me. The same thing happened with Aosibo. You should know and fully understand every characteristic of your batteries, and the competition's, and understand in what circumstances certain batteries are better performers than the Tesiyi.
Why do you say the HG2 have unsteady performance?
What about the Facebook pages saying 40A continuous? Those can be changed very easily.
Why did the web site and Facebook posts use 40A all this time if it's a 25A battery? Shouldn't both the web site and Facebook pages have used 25A right from the start? I'm confused how all your internal testing resulted in a 40A continuous rating.
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