Comparison of VTC4, VTC5, LG ICR18650HE2 and Samsung INR18650-25R
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Yup. I ordered two more "35 Amp" Purple Efest from Mt. Baker Vapor (to hit the $50 free shipping threshhold) and they both have a weird little "anti-counterfeit" sticker on them. First batteries I've seen of any label with such a thing but I'm still left wondering... why couldn't the anti-counterfeit sticker be counterfeited too?!? Not that anyone would really have a motive to counterfeit an Efest (the reason I buy them) but...
I believe efest would be able to verify. Maybe it's like the xtar charger verification where you plug in the serial # online. My purple efest 350s have a barcode with UPC. I suppose I could check them but never have because I bought them the minute they hit the shelves. Plus I'm ditching them for the new AWs once they show fatigue.
I was scouring through a page that Ryedan linked in the Sony discussion thread here - http://www.e-cigarette-forum.com/fo...y-who-makes-them-not-sony-6.html#post14446321
Poking around the PDF spec files they have on that website I found some interesting stuff.
LG 18650 HE2 tested to 35A with great discharge curve
- http://www.powerstream.com/p/LG 18650HE2 Technical Information.pdf
PDF says "confidential" in the top right hand corner and appears to be direct from LG... very odd.
But what I found most interesting, the Samsung 25R
- http://www.powerstream.com/p/INR18650-25R-datasheet.pdf
They have done extremely high pulse drain testing with that cell, nearly 100A. Again the PDF file says "confidential" but it definitively shows the battery can withstand very high drain, well into the 30A range and again the file appears to be direct from Samsung.
Then check out the last page for safety test specifications, even during the most aggressive methods of making a battery fail that they tested including putting them in a 140°C oven or crushing them the battery retained an impressive "L1" rating, which means it only leaked...no fire, no smoke. Very impressive.
I have been pushing both of these batteries well over 20A with daily use and they've been just fine, nothing has heated up and in fact I find my VTC5's being used LESS than my LG's and 25R's more recently. At first it was to "save" the VTC5's but now I'm realizing that they are all pretty much equals more or less.
Poking around the PDF spec files they have on that website I found some interesting stuff.
LG 18650 HE2 tested to 35A with great discharge curve
- http://www.powerstream.com/p/LG 18650HE2 Technical Information.pdf
PDF says "confidential" in the top right hand corner and appears to be direct from LG... very odd.
But what I found most interesting, the Samsung 25R
- http://www.powerstream.com/p/INR18650-25R-datasheet.pdf
They have done extremely high pulse drain testing with that cell, nearly 100A. Again the PDF file says "confidential" but it definitively shows the battery can withstand very high drain, well into the 30A range and again the file appears to be direct from Samsung.
Then check out the last page for safety test specifications, even during the most aggressive methods of making a battery fail that they tested including putting them in a 140°C oven or crushing them the battery retained an impressive "L1" rating, which means it only leaked...no fire, no smoke. Very impressive.
I have been pushing both of these batteries well over 20A with daily use and they've been just fine, nothing has heated up and in fact I find my VTC5's being used LESS than my LG's and 25R's more recently. At first it was to "save" the VTC5's but now I'm realizing that they are all pretty much equals more or less.
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Is the consensus that the Samsungs marginally better than the LGs then? I tend to vape 15-20w but on occasion may venture up to 25w.
By the charts, the Samsung does slightly better at 5 amps which is right in the ballpark for your power levels. It's by so little though, that I consider them the same at this power level.
Thanks - one battery I did consider but don't know if its suitable for mechs or dna 30s is the Panasonic NCR18650BD 3.7V 3200mAh. It does have a relatively low amp limit but 10A is fine for me and seems to have plenty of mah.
Ok, I'm lazy. I admit that I did t read thru the thread. What I want to know is if I can find the 25R's for less than $6 apiece. I'm ordering 6 tomorrow.....or as soon as I find a cheaper price. FOOT NOTE: not holding my breath
Not that I know of. But if you order a bunch of them that could change things
The cost of good batteries
Not even groups of 6 25R's on eBay sell for $6/per battery, the $6.00 each price from illumination supply is the best deal going right now IMO.
I like how the chart shows that even the best output less than 3.4 volts seconds into the test under such a high load. Also, If throw the 3.4 volts, and 35 amps into ohms law, that equates to roughly .1 ohm resistance at 119 watts.
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