More reason to buy here.Jon lists all the specs for the batteries.Liion rewrapped GA’S with quality FNK MOSFETs for 20A high current cutoff. Not 5A!
Just noticed Average shooter has not been around for 1 year 9 months! lol!
I just had a closer look at these 30Q batteries and I can actually see a very faint print under the wrapper:
On one side I see: L0I9, 68VB1. On the other I see 64F2, 64F2
I have no idea what that means.
How can I test impedance?
You got 10 of what? You posted right after mine so I thought you were talking about the protected Sanyos, but now I see you said the 18650 Battery Store and not IMR Batteries.
If you have a voltmeter then just do Google search to find an existing good step-by-step explanation. Some chargers can measure it too.
No. 18650batterystore is legit.
I tried in the liitokala, but it was showing very inconsistent results. Of course I should have googled how to do this before I asked. So as I gather, you get a large resistor like 10ohm, do a quick voltage measurement with no load, then again quickly with load (like for a second or two), plug the values into a formula and you get the resistance. I wish the charger was more accurate and consistent.
Yes, many meters don’t give consistent readings. My Vapcell S4 Plus gives actually pretty steady results, but according to HKJ’s review the values are lower than reality. I have noticed that measured value does seem to change based on the charge level of the battery.
No worries, I just wasn’t sure I would recall it correctly and didn’t want to post something from memory.
Heres a link to the datasheet. Proving that Samsung 30Q 4 leg batteries are fake | E-Cigarette Forum
The second character “0’ in the first line should be a dead giveaway that they are real. Granted I have 30Qs from Liion wholesale (which is a ”trusted” dealer) that DO NOT follow the Samsung datasheet and they swear up and down that they are real.
One thing that guy says is that every Q30 he’s seen uses 3 legs on the top contact. These appear to only have two legs, IE one on each side. Does that suggest anything?
Why? IMO that doesn’t prove anything because any forger could know what the datasheet says and thus make their imitations look real.
Yours are sounding like fakes to me — unless others who recently purchased these cells from known reputable dealers have also seen this new difference.
That is ALL you need to know. Mooch has a lot of experience and in my 9 years of buying 30Q I have Never seen one with Two Legs.
There are photos on this forum of Two legs but I could not find them.
Hold on. Are all yours BT? They do not look that great, but what Two leafs are you talking about? I thought you were referencing that to the FT batteries?
No OEM cell manufacturer makes button top cells, all button tops are modified by someone. You would need to take that top layer of shrink and the button top to see. Most trusted retailers like Liionwholesale, illumn, and 18650batterystore add the button top, insulator, and a top layer of clear shrink ontop of a legitimate cell.
True, but I trust Mooch’s experience and his recommended retailers substantially more than I do your opinion.
Have any of you seen any fakes that try to replicate the markings on the cell wall under the wrapper for a 30Q? Seems like more hassle for the fakers to go through. Thoughts?
If they exist, they havent been identified. Usually the fake cells can barely get the font and printing correct on the wrapper, I doubt they could make a perfect counterfeit without throwing a bunch of resources at it.
Yes, I saw them. I am not sure you can base a real or fake battery on its BT. Other factors like performance, labeling and info. under the label.
I see that you live in Australia. I can not recommend any credible dealers down under. There are many Aussies on here that could help you with that.I would recommend NOT to buy off of Ebay again.
By the looks of them, my guess is that they are fakes.
The bottom line here is to remove the clear jacket/button top to check the legs on the top of the cell. 4 legs = fake. All the other markings look correct, the 141 is just a manufacturing batch number.
Fair enough — but I really wasn’t questioning Mooch’s recommendations of li-ion retailers.
Well, I was reluctant to do any surgery to the battery. However I did end up buying some more batteries from a reputable seller in Australia (www.techaroundyou.com) which has been recommended on this forum. They arrived and I ran a simple test on them to compare. The short version is that the ones I got from ebay seem legit.
I ordered 3 batteries from this techardoundyou store and I noticed two were batch 141 just like the ones I got from ebay, and one was batch 136. So a very slight difference. Examining them closely, I noticed the batch 141 batteries from ebay looked identical in every way to the batch 141 ones from techaroundyou. Even down to the little unusual looking “Q” character. The battery from batch 136 had a slightly different printing on it which was more consistent with images of batch 136 Q30 batteries I’ve seen online.
What I did was get two 10 watt 1 ohm resistors in parallel, thus producing ~ 0.5 Ohms of resistance. Then while measuring the voltage on the cell I briefly completed the circuit to get some current flowing, and then measured the voltage results. I also ran it through a crude amp meter I had to measure peak amps - not sure how accurate it is since the voltage it reported was vastly different to what my multimeter said. Anyway the results were very consistent across all the batteries:
Initial voltage: 4.18
Voltage under load: between 3.78 and 3.83
Resistance: 0.5 Ohms approx
Current Measured in my power meter: between 6.67 - 6.70 amps
Calculated internal resistance: 0.045 and 0.053
Just for fun I did the same test on some old trustfire and ultrafire batteries I had laying around. They immediately went down from about 4.1v to 2.4v or tripped the protection built in. Terrible.
Along with the Q30’s from techaroundyou, I also purchased some Sony VTC4 high current batteries. They performed basically identically to the Q30’s, presumably because I’m no where near pulling enough amps to make the Q30’s start stressing and sagging voltage too much.
So to my very basic judgement, they seem like legit cells assuming the techaroundyou cells are legit, since they seem to perform identically under about 7 amp loads.
Thoughts?