Latest release Vapcell 21700 5600mah 12.5A battery

Just to share regarding my order of the 8pcs Vapcell K64. 1 battery arrived at 3.77v, another one is 2.1v, and the remaining 6 pieces are all less than 1.0v (0.15-0.85v)

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I used the AliExpress dispute system, the store offered to send some other battery type.. unfortunately I could not see any batteries listed anymore in Vapcell's AliExpress store. It looks like they do not ship batteries again to my country (I was able to check batteries, after I set the "country" to another country that's not mine). Since I couldn't check which other batteries I may be interested in (ie. I couldn't properly determine the prices of "other batteries" that they can send as replacement, I rejected this proposal.

The next option that came up was to offer a refund for the 7pcs K64 (1pc arrived at 3.77v, and that was deemed as a "good" battery, so that "good" one will not be refunded. Refund amount will only be for the 7 pieces overdischarged Vapcell K64.

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I tried to monitor the 1 piece Vapcell K64 that arrived at 3.77v (I didn't charge this battery yet), but the next day, I decided to start religiously monitoring its voltage, and this is what I got.

start of monitoring: (I use a Fluke 117 DMM to check voltage, and didn't use the battery at all during the entire time)

day 1: 3.768v

after 1 hour : 3.769v (strangely it increased by 0.001v)

after 10.5 hours: 3.767v

after 24 hours: 3.766v

after 34 hours: 3.765v

after 49 hours: 3.764v

after 72 hours: 3.761v

0.008v drop in voltage after 3 days, is this still considered a "good" battery?

05.13.2021:

Is there any progress? Does anybody know?

I thought I was lucky with my Vapcell K64 26650. After receiving the voltage was 3.8V, after a month it was 3.7V. And then three more weeks passed and the voltage became 2.5V. Sadness. So be careful.

That’s not too bad, compared to the ones I got. As mentioned in an earlier message, I got 8pcs. 1pc arrived at around 3.77v, another arrived at 2.0v, and the rest are between 0.1-0.8v.

Since I felt like experimenting, I tried to slow charge them first, until they got to usable voltage (3+ volts). I monitored if the battery’s temperature is getting warmer (some of them did get slightly warm, but not too hot).

Feeling more brave, I decided to charge them up to 4.20v (I use SkyRC MC3000 with temperature cut-off, so in case temperature gets warm, the charging should cut off.

In any case, 3 of the batteries are getting much warmer (40+ degrees Celsius; although being in a tropical country, basically our room temperature would be something like 30+ degrees Celsius basically whole year round). I noticed that those 3 just would not get to 4.20v even as charge current kept on decreasing (Constant Voltage phase of charging). I manually stopped the charging when the batteries won’t charge to 4.20v after maybe 1-2 hours. Did a discharge capacity for all 8 batteries, and about 5 of them only had around 5000+ mAh capacity, while 3 of them had around 6000+ mAh capacity (from full down to 2.50v cut-off at 1Amp discharge current).

Decided to charge all batteries to 3.70v and start checking which ones will self-discharge faster. As noted, the 3 that refuse to full charge, started to self-discharge faster (and actually the battery felt a bit warm to the touch compared to the slower-self-discharging K64). So, it means the batteries high “internal self-discharge” is being translated into heat (I was afraid at this time, because, will the battery vent or explode? I’ve not experienced venting or explosion yet from li-ion batteries before though…)

Anyway, placed the batteries in a non-flammable surrounding and started checking voltage. The fast self-discharge were already below 3.0v within 24-36 hours. While the slower self-discharging K64 took maybe 3 or more days to get to 3.0v. I didn’t try recharging the batteries and stopped monitoring voltage after around 3 days.

On checking, all batteries got discharged further. I want to try testing the batteries again, so I got the 3 “best” K64 (those that self-discharge slowest when I charged them to 3.70v)

So charged them to full 4.20v. They charged to 4.20v without problems. I hadn’t removed the batteries from the MC3000 charger yet, but maybe after an hour , the MC3000’s fan automatically turned ON (meaning it detected a hot battery, even though charging has already stopped about an hour ago or so. I immediately checked and one of the batteries that charged to 4.20v, is getting WARM. This scared me somewhat. Immediately removed the said battery, and I thought to immediately discharge the warm K64 battery using a cheap generic flashlight (so placed the WARM fully-charged K64 battery inside a cheap generic flashlight to drain the battery, set to a low-medium brightness level - I think that generic flashlight uses less than 1 Amp for that brightness setting). It took several hours to drain the battery, at least it’s not warm anymore after getting discharged.

In summary, even the previously “good” K64 (even the one that arrived at 3.77v), it now experiences fairly fast self-discharge (won’t last 1 week before it gets to below 3.0v). Although I just charged them to 3.70v (MC3000 allows ‘storage’ mode and configurable charge/discharge end-voltage setting)…

So, none of the 8 K64 are really “good” as all of them self-discharge fairly quick. It seems that charging them to Full 4.20v is a main cause for the battery getting faster self-discharge issue. (I don’t suggest to test these batteries without monitoring temperature and exercising caution…)

Another week after measuring 2.5V, the battery Vapcell K64 showed 1.5V. :confounded:

My 2nd of 2 K64's that seemed to hold a charge doesn't anymore. Oh well, no loss with the full refund given.

Edit: After 2 days back and forward messaging , they thought I was a Korean customers that’s why they were asking tax things. So now, all seems fine and batteries shipped :+1:
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Hi, question to people who lives in Canada and orders from Aliexpress.

I ordered 2pcs samsung 30Q from vapcell aliexpress. Customer service asking for a custom clearance number.
What is that mean? It’s my first order from Aliexpress, so I have no idea about it. Do I have to pay tax for 2pcs battery?
Is it complicated?
Thank you!

I can not answer your question. I can only say that in the past I have never had to provide a clearance number or pay tax. My last order from vapcell was probably over a year ago.

Perhaps new policies are in effect.

Hello, there should be no extra tax

You can also contact my sales colleagues and customer service personnel for details

Vapcell recently released a new k62 to replace the old k64, which is currently on sale,

At present, the problem of battery quality has been solved. The new k62 has stable quality and amazing 6200mah capacity

However, due to the rapid rise in the cost of battery raw materials, the price of batteries has increased rapidly

Vapcell recently released a new k62 to replace the old k64, which is currently on sale,

At present, the problem of battery quality has been solved. The new k62 has stable quality and amazing 6200mah capacity

However, due to the rapid rise in the cost of battery raw materials, the price of batteries has increased rapidly

Can you make a way to ship the Vapcell K62 6200mAh 26650 to our country (Philippines), hopefully without too high shipping cost? If it’s too high, then this battery won’t sell in my country…

Friends, how much do you need? If you need a small amount of batteries, it is not recommended to buy them. Because the postage is too expensive. If you buy a lot of batteries, you can get a discount and the shipping will not be so expensive. If you are interested, please go to AliExpress to contact customer service! :smiley:

Friends, how much do you need? If you need a small amount of batteries, it is not recommended to buy them. Because the postage is too expensive. If you buy a lot of batteries, you can get a discount and the shipping will not be so expensive. If you are interested, please go to AliExpress to contact customer service!

Wanting more amps on some of these 26800 flashlights I ordered 2 Vapcell INR26800 6200mah 25A. Fully charged they measured a capacity of 6595 mah and 6622 mah when drained to 2.8 volts at 1 amp. Looking at the posted graph I’m placing them into two of the highest drain lights I have. Both quad XHP50’s.

Thank you. Is this purchased from ali-express Store?

The stock of this product is limited

Bought it from illumn.com.

Any one living in SEA and made purchase recently? How long did the shipment take?

It usually takes 2 to 4 weeks

If you mean Southeast Asia, I am in Singapore and I have received shipments from Ali Express within 10 days in most cases lately.

One Sofirn SC21 Pro green, SP33S blue, and one Lumintop FW21 Pro “gold” ( = copper) have been shipped and left China heading to Singapore now. Got the FW21 Pro today (9 Nov), after placing an order on 3 Nov — delivered in just one week!

So shipping out of China seems quite normal despite the 11/11 Sale and the recurring COVID lockdowns in some Chinese cities.

On 7 November I ordered two 26800 cells from Vapcell Factory Store on Ali Express. Usually battery shipment will take much longer than two weeks.