please contact Cassiel for tracking update , hope you will get it soon,
Thanks you very much
Thanks Djozz for the good info. Vapcell have been releasing some really top notch cells lately. They have the best cells of each size, this 16340, 14500 gold wrap, 18650 p26A/p28a and vtc5d/vtc6a,21700 p42a, and 26650 red wrapper that tested 59xx mah may same as the Shocklis
Thanks you very much,SKV89
Our company will continue to provide the best batteries for the market.
Thank you for your support of vapcell
Have a nice weekend!
All Forum Members,have a nice weekend.
I purchased and tested a gold 14500 button top this evening. The discharge capacity was 966 mAh, with a charge capacity of 970 mAh’s at 4.18 volts.
The resistance was 103 ohms. Seems a bit high, especially in comparison to my Efest 14500 (29 ohms) and my EBL 14500’s (all four are 49-54 ohms). Thoughts?
I purchased and tested a gold 14500 button top this evening. The discharge capacity was 966 mAh, with a charge capacity of 970 mAh’s at 4.18 volts.
The resistance was 103 ohms. Seems a bit high, especially in comparison to my Efest 14500 (29 ohms) and my EBL 14500’s (all four are 49-54 ohms). Thoughts?
This battery is the flat top of the original version, and the product consistency is very good.
Some customers need a button top, which requires spot welding machine welding
Sometimes there will be oxidation problems, which will lead to the increase of internal resistance of batteries.
We are also improving welding technology.
Thank you very much for your feedback.
The other batteries you’re talking about are the original version, button top, not welded.
Can you accept flat top? You can use tools to remove the button top. Then the battery is flat head.
Internal resistance less than 60 mOH
Thank you
Your charger is not reading IR of button tops accurately. Your other thread explains it
Your charger is not reading IR of button tops accurately. Your other thread explains it
I got the Xtra Dragon VP4 plus which uses probes to measure both voltage and resistance. All my other battery testing looks good, even a few button tops I have.
Prior I was using the Miniboxer C4-12 which is not accurate like mentioned.
19/04/2019 Hello, everyone. To repay BLF fans, vapcell launched four discounted batteries. Add a button top to fit the flashlight better. $20.01/pair Vapcell 18650 2600mah 25a rewrap H26 ":https://www.aliexpress.com/store/product/1-dollar-coupon-Vapcell-18650-2600mAh-25A-Rewrap-molicel-p26a-H26-beats-VTC5A-equal-VTC6A-20S/1084158_32996666155.html?spm=2114.12010609.8148356.7.5a071e8fQu17pC $19.94/pair “Vapcell 20700 3100mah 30a Page Not Found - Aliexpress.com $21.24/pair"Vapcell 20700 3200mah 30a rewrap sanyo 2070A”: 14.54€ |Vapcell Original 20700 3200mah 30A rewrap NCR20700A Li ionen batterie wiederaufladbare lithium Batterien für taschenlampe|Ersatzbatterien| - AliExpress $24.29/pair "Vapcell 20700 3500mah 30a rewrap best sanyo 2070C ": Page Not Found - Aliexpress.com If you don’t like it, please tell me which one you like, and we will make a discount for you next time. Have a great weekend ahead of time.
Last time, when I ordered button top Vapcell batteries from the Vapcell AliExpress store, I got button top batteries with significantly increased internal resistance compared to the flat top ones of the same type. Can you confirm, that Vapcell have revised the method of applying button tops, or it is still not recommended to get button top battery if I would expect the same (or nearly the same) current specification for the selected battery?
And this is not a charger related problem, as I have reliable Samsung INR18650-30Q button top batteries, which has nearly same internal resistance reading in my chargers, as the flat top ones.
I received my Vapcell 16340’s today. I ran a 3 amp discharge test on the icharger from fully charged. I got 638mah at 12 min and 45 secs down to 3v.
Down to 2.75v, I got 726mah at 15 min and 25 secs. This test was done at a constant discharge of 3 amps and there’s no doubt this cell will make 800mah or more at a 1 amp or less discharge.
When I started the test the voltage stayed decently high. It started at 3.7v under the load and fell rapidly to 3.6v where it slowly crept down to 3.5v after about 3 mins. The cell done very well holding around 3.5v for awhile.
We have a new 16340 King, less sag and more capacity .
Thanks Vapcell for improving on these smaller size cells. Great Job .
I received my Vapcell 16340’s today. I ran a 3 amp discharge test on the icharger from fully charged. I got 638mah at 12 min and 45 secs down to 3v.
Down to 2.75v, I got 726mah at 15 min and 25 secs. This test was done at a constant discharge of 3 amps and there’s no doubt this cell will make 800mah or more at a 1 amp or less discharge.
When I started the test the voltage stayed decently high. It started at 3.7v under the load and fell rapidly to 3.6v where it slowly crept down to 3.5v after about 3 mins. The cell done very well holding around 3.5v for awhile.
We have a new 16340 King, less sag and more capacity .
Thanks Vapcell for improving on these smaller size cells. Great Job :+1: .
Thanks you very much,moderator007
vapcell Dennis:19/04/2019 Hello, everyone. To repay BLF fans, vapcell launched four discounted batteries. Add a button top to fit the flashlight better. $20.01/pair Vapcell 18650 2600mah 25a rewrap H26 “:https://www.aliexpress.com/store/product/1-dollar-coupon-Vapcell-18650-2600mAh-25A-Rewrap-molicel-p26a-H26-beats-VTC5A-equal-VTC6A-20S/1084158_32996666155.html?spm=2114.12010609.8148356.7.5a071e8fQu17pC $19.94/pair ”Vapcell 20700 3100mah 30a Page Not Found - Aliexpress.com $21.24/pair”Vapcell 20700 3200mah 30a rewrap sanyo 2070A”: 14.54€ |Vapcell Original 20700 3200mah 30A rewrap NCR20700A Li ionen batterie wiederaufladbare lithium Batterien für taschenlampe|Ersatzbatterien| - AliExpress $24.29/pair “Vapcell 20700 3500mah 30a rewrap best sanyo 2070C ”: Page Not Found - Aliexpress.com If you don’t like it, please tell me which one you like, and we will make a discount for you next time. Have a great weekend ahead of time.
Last time, when I ordered button top Vapcell batteries from the Vapcell AliExpress store, I got button top batteries with significantly increased internal resistance compared to the flat top ones of the same type. Can you confirm, that Vapcell have revised the method of applying button tops, or it is still not recommended to get button top battery if I would expect the same (or nearly the same) current specification for the selected battery?
And this is not a charger related problem, as I have reliable Samsung INR18650-30Q button top batteries, which has nearly same internal resistance reading in my chargers, as the flat top ones.
Thank you very much for your feedback.
At present, spot welding machine has been upgraded and welding quality has been improved.
…
The resistance was 103 ohms. Seems a bit high, especially in comparison to my Efest 14500 (29 ohms) and my EBL 14500’s (all four are 49-54 ohms). Thoughts?
Analyzing chargers usually are rather bad at measuring battery internal resistance. Contact resistance is easily burdened by oxidation or debris. I also guess you meant to say mΩ instead of Ω, don't you? ;-)
FaintReality:…
The resistance was 103 ohms. Seems a bit high, especially in comparison to my Efest 14500 (29 ohms) and my EBL 14500’s (all four are 49-54 ohms). Thoughts?Analyzing chargers usually are rather bad at measuring battery internal resistance. Contact resistance is easily burdened by oxidation or debris. I also guess you meant to say mΩ instead of Ω, don’t you?
XTAR Dragon VP4 plus uses probes to measure resistance and they are accurate when comparing to my fluke. I’m assuming I got old stock before they upgraded their button top welding process.
If that is so I would remove the button top, carefully precision sand down any welding bulges and then rewrap those cells FaintReality.
Barkuti: FaintReality:…
The resistance was 103 ohms. Seems a bit high, especially in comparison to my Efest 14500 (29 ohms) and my EBL 14500’s (all four are 49-54 ohms). Thoughts?Analyzing chargers usually are rather bad at measuring battery internal resistance. Contact resistance is easily burdened by oxidation or debris. I also guess you meant to say mΩ instead of Ω, don’t you?
XTAR Dragon VP4 plus uses probes to measure resistance and they are accurate when comparing to my fluke. I’m assuming I got old stock before they upgraded their button top welding process.
Old version spot welding process, button top 14500 1000 mah, AC impedance less than 60 milliohms
the 14500 button top is very small , no good contacts, and the AC internal resistance meter is very slow to check, so there is no full inspection.
DC internal resistance measurement is inaccurate and vulnerable to contact internal resistance
But they’re basically oks.
There may be very few weld defects.
We can only improve the welding process, deeper breakdown and less oxidation as far as possible.
If that is so I would remove the button top, carefully precision sand down any welding bulges and then rewrap those cells FaintReality.
If it is a capacity battery, such as 1A current output, the button top internal resistance has little effect.
battery with pcb will add more AC IR,
If it is a high-power battery, it will have a greater impact.
For example, if the AC impedance of samsung 30T, 7mOhm is changed into 10mOhm by adding a button top, then the continuous discharge is only about 30A.
I understand vapcell Dennis, but FaintReality reports twice the internal resistance of an EBL 14500 for his Vapcell 14500. I know his figures are far from real DC resistance values but to me that means his Vapcell 14500 is likely well above 200mΩ of internal resistance. So pretty bad. Being so removing the button top and using a rotary tool with a grinding bit to gently fix the welding remnants is a wise choice.
I understand vapcell Dennis, but FaintReality reports twice the internal resistance of an EBL 14500 for his Vapcell 14500. I know his figures are far from real DC resistance values but to me that means his Vapcell 14500 is likely well above 200mΩ of internal resistance. So pretty bad. Being so removing the button top and using a rotary tool with a grinding bit to gently fix the welding remnants is a wise choice.
Using the Xtar Dragon VP4 plus, I got the following results from my current 14500 button tops:
EBL #1 - 54 mohm
EBL #2 - 49 mohm
EBL #3 - 49 mohm
EBL #4 - 54 mohm
Vapcell (gold) - 103 mohm
Efest (2018 purple) - 29 mohm
So although the Xtar may not be 100% accurate, it is more than sufficient to use for comparison sake, which raised a red flag when comparing the Vapcell to the Efest and the cheap eBay EBL batteries.
I would remove button top and re-wrap, but these batteries are for a Sofirn SF14 V2.0 which requires button tops. I may just do it out of curiosity sake…
Barkuti:I understand vapcell Dennis, but FaintReality reports twice the internal resistance of an EBL 14500 for his Vapcell 14500. I know his figures are far from real DC resistance values but to me that means his Vapcell 14500 is likely well above 200mΩ of internal resistance. So pretty bad. Being so removing the button top and using a rotary tool with a grinding bit to gently fix the welding remnants is a wise choice.
Using the Xtar Dragon VP4 plus, I got the following results from my current 14500 button tops:
EBL #1 - 54 mohm
EBL #2 - 49 mohm
EBL #3 - 49 mohm
EBL #4 - 54 mohmVapcell (gold) - 103 mohm
Efest (2018 purple) - 29 mohm
So although the Xtar may not be 100% accurate, it is more than sufficient to use for comparison sake, which raised a red flag when comparing the Vapcell to the Efest and the cheap eBay EBL batteries.
I would remove button top and re-wrap, but these batteries are for a Sofirn SF14 V2.0 which requires button tops. I may just do it out of curiosity sake…
Sincerely apologize, please let me know your order number, I will call Ail Express customer service to contact you, compensation to you.
DC IR during 3.5A discharge:
Flat top 14500:
Button Top 14500:
I just got the 4 wire cell holder today. Still not entirely sure how relevant or useful this information is.