I saw on Reddit from a June of 2022 post a way to unscramble codes for Eve batteries. It must be outdated. Because the way he has it on there this cell would be manufactured in 2035( P). The way to identify the date must have changed. Does anybody know how to unscramble this?
Photo below. Just received four of them from 18650 battery store.
Code is PPK6PPFC
P.S I called 18650 and they’re going to try to give me the date it was manufactured. They didn’t seem interested in telling me how they unscramble the code they said they’re too busy. Well, they could just about say anything can’t they? If they give me the method to Unscramble it, I can confirm it on my own and use it for the future without bothering them or anyone else.
I am curious about this too. I got 4 cells from the 18650 store that are all marked just like your.
I got 4 from DIY500AMP that are completely different:
Very curious. I have nothing that will measure enough current to fully test these. I think I will get the AC IR tester out and see what that tells me. The last ones are curious to say the least.
I saw on Reddit from a June of 2022 post a way to unscramble codes for Eve batteries. It must be outdated. Because the way he has it on there this cell would be manufactured in 2035( P). The way to identify the date must have changed. Does anybody know how to unscramble this?
Photo below. Just received four of them from 18650 battery store.
Code is PPK6PPFC
P.S I called 18650 and they’re going to try to give me the date it was manufactured. They didn’t seem interested in telling me how they unscramble the code they said they’re too busy. Well, they could just about say anything can’t they? If they give me the method to Unscramble it, I can confirm it on my own and use it for the future without bothering them or anyone else.
I wonder if the one you just posted is real? Doesn’t have a QR code doesn’t have a legitimate date code. Recycle symbol in that CCC code whatever that is. Maybe because it is not a production batch.?
Good questions. I wrote them and asked the question about authenticity and manufacturing date.
BTW the AC IR of all 8 cells is identical to 3 decimal places at 4.17x mOhms
This is higher than the only other one that I have that measured at 4.09 mOhms . And is close to the JP40 tabless cells that I have measured. I will run some capacity tests, But I can’t easily go above 1 amp discharge…
The numbers I got didn’t work in any of the decoders.. it was the same for others in the thread I linked above. The decoders kept telling me that I didn’t have enough numbers… LiFeP04 Cell Verification gives me 14 characters the decoder wants 24. Maybe because the decoders I found are all for LiFePO4 cells/batteries not Lithium Ion. ???
Ok.. did you try the code that I have on my battery in the op? Same code that you have because you got them at 18650 also. I tried that QR Scanner didn’t work for me either
They want 24 digits on all of the decoders that I tried (3 different ones). the one you posted is like 7. All of them seem to be for LiFeP04 cells or batteries.
I ordered 6 cells from Nkon in the Netherlands (which is generally considered a reliable source) as soon as the became available for pre-order and those are basicly identical in appearence as the one on your photo.
Nkon explicitly mentioned that these had a customized logo for a client, but in the end the client didn’t pick up the order and EVE carefully removed the logo from the wrapper (it’s barely visible) and offered them for sale. More can be found in the old listing: https://www.nkon.nl/eve-inr21700-50pl-5000mah-125a.html?___store=en
When I recieved the 6 batteries, I randomly numbered them and I measured the voltages when I recieved them and also the ACIR resistence. (Measured with a Fnirsi HRM-10 and with the battery holder/stand for consistency.)
Here are the measurements of the 6 (randomly numbered) cells:
3,554V → 3,16 mOhm
3,556V → 3,32 mOhm
3,328V → 3,41 mOhm
3,554V → 3,16 mOhm
3,552V → 3,20 mOhm
3,551V → 3,18 mOhm
As you can see, the voltages they arived at were really close together, but with 1 exception: 'cell number 3 had a noticable lower voltage. I had already read about some 50PL having high selfdrain, so I charged that cell up to as close as possible to the other cells, wrote down the current voltages of each cell and the date and put them in storage for a couple of weeks.
After 2 or 3 weeks I checked again and where 5 out of 6 cells retained their voltages perfectly fine (max 0,001/0,002 mV drop, which is neglectable), cell number 3 had indeed drained way more, so it’s safe to assume that is one of the 50PL’s suffering from that issue. Fortunenately it’s only one out of 6, so I can live with that. (It was also the cell with the highest ACIR, although it wasn’t a massive difference.)
I haven’t had the time to do proper capacity tests on them, since I’m planning to do that on dedicated electronic load/battery tester and according to manufacturers specs. This means I have to test each cell one by one, under similar conditions and according to manufacturers spec (0.2C discharge current and cut-off at manufacturer stated voltage).
So that basicly means ~5 hours of discharge at 1A/1000mA for each cell, times 6 and that is without some setup time, checking the cells have been charged to an as close as possible voltage and had the same ‘rest(ing) time’ before starting the discharge test.
For some reason it’s a task that I’ve been postponing for a while now!
Offtopic:
Since the Ampace JP50 is now in stock at Nkon, I ordered 2 of them to give them a quick try, to see how they stack up against the 50PL. Because I had some small shipping costs, I also threw in a Reliance RS50 (only 1, since they’re one of the more expensive competitors in this field.)
I also noticed that the Tenpower 40XG was in stock, so added also one of those, since Mooch was positive about it and the 50XG. Only went for 1x 40XG, since I’m more interested in the 50XG, but that wasn’t in stock today when ordering. (Expected to become available in the coming days.)
Bit by bit I’m getting pretty complete collection of all the current high drain cells, which I make use of waaay to little to keep justifying of buying more!
Thanks very much for that. It makes me feel better about the labeling on these. I got 4 of them. Testing now. I will need to monitor for the voltage drop issue. Please keep us posted on your continuing testing.
Still though, no clue on figuring out the date codes…
BTW this is what I got for the first 4. Two on the left are the ones with no QR code. Tested at 0.5 Amps. They have been sitting for about 6 hours in the charger. It looks like I need to keep an eye on the number 1 cell for self discharge.
