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Wh and Ah and More

While not the biggest consumer of the 18650 Store EVE LF280K cells, the (36) cells I have from them ALL test above the rating.
EVE LF280K V3 cells test at 299ah-304ah, earlier versions all 284ah-286ah.
I would buy from 18650 Store again when I need more DIY Battery Bank cells.

Do you have a copy of the test report from the V3 from 18650 store? Can you post a screenshot I need to confirm what SFK is saying are the round terminal dual pole 280K really testing below the octagon versions?
 
Tim you seem to get super upset anytime SFK is mentioned
I'm not upset at all. I didn't buy anything from them.
are you worried 18650 might loose sales to them?
Not at all. 18650batterystore has enough trouble keeping stock.
If more people buy from other vendors, I'll have a better chance of getting cells whenever I want.
Please tell us about SFK's "shadyness"
You have quoted it yourself. So, you are well aware.
I have over 86 cells from them and have 48 more coming.
I'm glad that it has worked out for you. I don't wish anyone bad luck.

I can only recommend vendors that I have purchased from. But others have recommended many other vendors that they were happy with.
All of my opinions of vendors are based on information I have found in this forum. That's what it's here for.
 
Perfect example of the ridiculous double standard, Docan world famous for selling counterfeit sanded of Re-lasered QR codes are OK with you but SFK being mean to scammers is not. Good to know!
You missed the part of my quote where I purposely bought grade B cells from 18650.
I would not buy 280s from Docan but like I said I'd buy 230s from them again if the price were right. World famous? Wow.

Being mean and digging up someones personal records and slandering them on youtube are 2 totally different things in my book (yea SFK removed that video...)
He has an online YouTube channel and confirmed my results the cell was bad, he said he may do a video but I don't know.
Right.... Have a nice day. I'm done arguing. Let's get the thread back on track.
 
Bro, wtf is up with this 280K this is one screwed up line of cells man. I just realized the dual pole 280k are NOT octagon terminals! Looks like EVE is up to some BS again!
The logical conclusion is those round terminals are in fact v2s being sold to purge out inventory of the V2, versus octagonal v3s that potentially may not have issues down the track like V1 and V2.
 
Do you have evidence of this or just your personal opinion, I reviewed many of there claims did not find any major discrepancy. In fact does anyone have the capacity report sheets form 18650? They say they email these to you when you place an order, we can get an answer for this if indeed the dual pole cells are testing lower or not.

I know that SFK was busted for misrepresenting their grade B cells

When was this? You have a link?

Here’s the thread I was looking for earlier. There is another thread referenced within it that’s also worth reading.

 
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Just to throw it out there, but I've bought from Sirko quite a few times and I knew they weren't Top Of The Line 110% rating Brand New Super Grade AAAAAAA batteries, but my 52Ah batteries came it at 51.8Ah, and my 100Ah came in at 99.7 so for the money I saved was still a really good value for play batteries and small projects. About the only complaint I can think of from all the things I've bought is that the JBD BMS's I get from them don't talk to the Overkill app. ?
 
Wait I’m confused. I know that SFK was busted for misrepresenting their grade B cells, but I thought we were talking about 18650 battery store here. Did they also misrepresent?

That's news to me sounds like you are pulling stuff out of your rear. ?I have cells from 18650 and SFK both had test reports 18650 emailed me an excel file and the 48 cells I just got from sfk have all the cell testing data on each cell.

While I don't agree with a lot of what Alkaline says, his post pretty much took all credibility from RayfromTx as far as I'm concerned: https://diysolarforum.com/threads/sunfunkits-show-their-true-color.44653/post-676976

280K cells v1 and v2 all test just slightly below rating, even the dual pole I have from 18650 tested to 278 AH, I still liked them, but I have sanded off the tops of the holes as it appears the dual pole have anodizing that needs to be removed. If you don't like the results you need to go ask EVE what the problem is 18650 and SFK are just showing what was given to them by EVE.

Meanwhile the company that the RayfromTx keeps telling everyone to buy from does stuff like this: https://diysolarforum.com/threads/docan-power-bad-experience-beware.61866/post-773779
 
That's news to me sounds like you are pulling stuff out of your rear. ?I have cells from 18650 and SFK both had test reports 18650 emailed me an excel file and the 48 cells I just got from sfk have all the cell testing data on each cell.

I’m sure SFK has good cells. I had high respect for them until I read the following two threads (second thread within the first). It doesn’t look good on SFK’s part. Since they have not come on here to clear their name, I’m left with threads like these.

Seems like everyone has something bad to say about some seller, so I do keep in mind that it matters who says what. Some users here I respect their opinion more than others based upon their post history.

If and when I am ready to buy cells, most likely I will buy from a USA seller. I will call them first and ask questions and see how open and honest they appear to be on the phone. I’ll use that experience combined with the user reviews on this forum. Most likely I’ll buy from 18650batterystore because I can’t seem to find much dirt on them and users I respect have bought a lot of cells from them and they STILL recommend them!

I bought a lot of stuff from Renogy and because of how they treated me, I do NOT recommend them anymore! Victron from Invertersrus.com is who I recommend now.

 
I’m sure SFK has good cells. I had high respect for them until I read the following two threads (second thread within the first). It doesn’t look good on SFK’s part. Since they have not come on here to clear their name, I’m left with threads like these.

Tomthumb,

You said I have been here for a while, well haven't you? Both 18650, and SFK had there account removed when the vendor section was removed along with various other alibaba sellers account so how exactly are you expecting any response form either company. No company is going to want to engage in a place where they have been removed I have spoke to both Chris from 18650 and Tommy from SFK they both said (paraphrasing) Will Prowse is a good guy but the forums basically are run by third party sellers.

I remember reading those threads and I can tell you they both were accusing docan and a number of other alibaba companies of the same thing: selling grade B cells as A. Back then there wasn't the QR codes with a B so it was harder to tell, but test report existed then to but trying to distinguish between the 2 grades was very difficult. Basically the vendor forum was a big mess so its understandable why its gone.

As for the thread you point to its ramblings you have SFK haters vs SKF supporters (and you can add me to this because I have rept 280s from them, but I try to be unbiased, emphasis on the TRY). There is nothing everyone isn't already aware of and has made there opinion of.

18650, SFK, Ezealco and Now Battery Hookup all sell grade A cells with test reports, you can not go wrong from any vendor and there prices are within a few dollars of each other. Depending on the amount of cells you need you can select the vendor that suits you best. No one is buying 4 cells form SFK as there prices are too high, but clearly if you need a lot of cells they have the best price/cell. For me Ezealco would be the best if you need 16 cells as I can drive to houston and pick up them (even thought I have to pay sales tax). I think you and timselectric are trying to create unneeded BS drama among these vendors when you should be focusing on the fight between vendors that have test reports and the ones without.
 
Tomthumb,

You said I have been here for a while, well haven't you? Both 18650, and SFK had there account removed when the vendor section was removed along with various other alibaba sellers account so how exactly are you expecting any response form either company. No company is going to want to engage in a place where they have been removed I have spoke to both Chris from 18650 and Tommy from SFK they both said (paraphrasing) Will Prowse is a good guy but the forums basically are run by third party sellers.

I remember reading those threads and I can tell you they both were accusing docan and a number of other alibaba companies of the same thing: selling grade B cells as A. Back then there wasn't the QR codes with a B so it was harder to tell, but test report existed then to but trying to distinguish between the 2 grades was very difficult. Basically the vendor forum was a big mess so its understandable why its gone.

As for the thread you point to its ramblings you have SFK haters vs SKF supporters (and you can add me to this because I have rept 280s from them, but I try to be unbiased, emphasis on the TRY). There is nothing everyone isn't already aware of and has made there opinion of.

18650, SFK, Ezealco and Now Battery Hookup all sell grade A cells with test reports, you can not go wrong from any vendor and there prices are within a few dollars of each other. Depending on the amount of cells you need you can select the vendor that suits you best. No one is buying 4 cells form SFK as there prices are too high, but clearly if you need a lot of cells they have the best price/cell. For me Ezealco would be the best if you need 16 cells as I can drive to houston and pick up them (even thought I have to pay sales tax). I think you and timselectric are trying to create unneeded BS drama among these vendors when you should be focusing on the fight between vendors that have test reports and the ones without.
If cells test to 280-290ah, is that A or B grade?
 
Please tell us about SFK's "shadyness"

1702500608022.png

This was when the LF280k cells didn't pull 280Ah. Back before it became well known that EVE had issues with the 280k not pulling full capacity. So people measured SFK cells, and didn't reach 280Ah even if the test report said they would (which EVE probably messed up). Instead, users were at fault for 'wrong test equipment' and 'conventional YT mindset'. And they came up with the 'you must take the measured Ah and multiply with 3.2V and you get the correct Wh on the label' - which is nonsense. A main reason to measure Ah instead of Wh is because you can take voltage (and any losses related to that) out of the equation (which I've demonstrated and is on a video on my channel). If they then make claims such as "Ah without nominal voltage means nothing, otherwise we have an infinite Ah battery for you at 0V" (see screenshot above) you've completely lost all my respect and confidence.
 
Tomthumb,

You said I have been here for a while, well haven't you? Both 18650, and SFK had there account removed when the vendor section was removed along with various other alibaba sellers account so how exactly are you expecting any response form either company. No company is going to want to engage in a place where they have been removed I have spoke to both Chris from 18650 and Tommy from SFK they both said (paraphrasing) Will Prowse is a good guy but the forums basically are run by third party sellers.

I remember reading those threads and I can tell you they both were accusing docan and a number of other alibaba companies of the same thing: selling grade B cells as A. Back then there wasn't the QR codes with a B so it was harder to tell, but test report existed then to but trying to distinguish between the 2 grades was very difficult. Basically the vendor forum was a big mess so its understandable why its gone.

As for the thread you point to its ramblings you have SFK haters vs SKF supporters (and you can add me to this because I have rept 280s from them, but I try to be unbiased, emphasis on the TRY). There is nothing everyone isn't already aware of and has made there opinion of.

18650, SFK, Ezealco and Now Battery Hookup all sell grade A cells with test reports, you can not go wrong from any vendor and there prices are within a few dollars of each other. Depending on the amount of cells you need you can select the vendor that suits you best. No one is buying 4 cells form SFK as there prices are too high, but clearly if you need a lot of cells they have the best price/cell. For me Ezealco would be the best if you need 16 cells as I can drive to houston and pick up them (even thought I have to pay sales tax). I think you and timselectric are trying to create unneeded BS drama among these vendors when you should be focusing on the fight between vendors that have test reports and the ones without.

Alkaline - Thanks so much for that concise perspective of the topic. You obviously know more than I do. I certainly did add to unnecessary drama with my "off the rails" comments (oops that was a different thread) my adding to confusion to the topic. If we all were in person and could banter quickly back and forth, one of you probably would have shut me down right quick basically telling me I don't know what I'm talking about. Well, I do know what I'm talking about, but only the part that I know about, lol! I don't know the whole story and people like you know more of it.

I'm sorry to this forum for not keeping my mouth shut, but I'm glad it resulted in what you just wrote to me here. I want to buy cells at some point (might be a year out or more) and starting to learn the landscape and history is helpful. Perhaps I should have just read hundreds of more posts/comments before chiming in here.

As for this forum being run by third party sellers, maybe that was the deal in the past (when 18650 and SFK were part of it), but I don't get the sense it's that way now. I think Will made a good call on cutting out the vendor section. I wasn't here during that fiasco but have read about it a few times. And I guess there was a group buy that lots of people got burned on.

Now the main vendors on the forum I am aware of (and aren't cell-specific) are Current Connected and Signature Solar. There is obviously a lot of grunting about SS and I hear pretty much nothing but good for CC. I think it is a boon that both companies participate here. CC in particular adds a lot of value to this forum, IMO and I do hope that is turning into more sales for them. Their business model isn't suited so much for my needs (the cost of shipping kills it for me usually) as I don't need the higher level of customer service they offer. But if I wasn't so cheap (my solar is currently confined to our leisure camp trailer), I would just buy everything (not cells obviously as I don't think they sell them) from them and rest assured I would much more likely to be taken care of over another company that sells cheaper but struggles to follow through on support. I have mostly bought (not cells they don't sell them) from invertersRus.com as they have b-stock Victron which saves a few ponies and their customer service (plus free shipping) has been excellent. I once ordered a set of battery cables from CC and shipping was $19...I told them about this and I think they have lowered the price on small items like that, good to know they listen to their customers...they do seem to care a lot.
 
I also told both companies how I run this forum and told them I run it 100% and if someone has a problem, come to me.

Vendors can post just fine here, but direct promotion isn't. What we had in the past was Michael b caros and endless salesman accounts pushing their products on members. Not cool.
 
Alkaline - Thanks so much for that concise perspective of the topic. You obviously know more than I do. I certainly did add to unnecessary drama with my "off the rails" comments (oops that was a different thread) my adding to confusion to the topic. If we all were in person and could banter quickly back and forth, one of you probably would have shut me down right quick basically telling me I don't know what I'm talking about. Well, I do know what I'm talking about, but only the part that I know about, lol! I don't know the whole story and people like you know more of it.

I'm sorry to this forum for not keeping my mouth shut, but I'm glad it resulted in what you just wrote to me here. I want to buy cells at some point (might be a year out or more) and starting to learn the landscape and history is helpful. Perhaps I should have just read hundreds of more posts/comments before chiming in here.

As for this forum being run by third party sellers, maybe that was the deal in the past (when 18650 and SFK were part of it), but I don't get the sense it's that way now. I think Will made a good call on cutting out the vendor section. I wasn't here during that fiasco but have read about it a few times. And I guess there was a group buy that lots of people got burned on.

Now the main vendors on the forum I am aware of (and aren't cell-specific) are Current Connected and Signature Solar. There is obviously a lot of grunting about SS and I hear pretty much nothing but good for CC. I think it is a boon that both companies participate here. CC in particular adds a lot of value to this forum, IMO and I do hope that is turning into more sales for them. Their business model isn't suited so much for my needs (the cost of shipping kills it for me usually) as I don't need the higher level of customer service they offer. But if I wasn't so cheap (my solar is currently confined to our leisure camp trailer), I would just buy everything (not cells obviously as I don't think they sell them) from them and rest assured I would much more likely to be taken care of over another company that sells cheaper but struggles to follow through on support. I have mostly bought (not cells they don't sell them) from invertersRus.com as they have b-stock Victron which saves a few ponies and their customer service (plus free shipping) has been excellent. I once ordered a set of battery cables from CC and shipping was $19...I told them about this and I think they have lowered the price on small items like that, good to know they listen to their customers...they do seem to care a lot.
Anyone can make an account here today. If there is any corporate affiliation of a member, needs to be stated in the subtitle of a profile.
 
Further on Will's post, we have also had Manufacturers/Developers, Vendors/Suppliers who have come on here, and interacted with the membership in both supporting them and even in gaining their help & feedback to improve products & offerings.

There are other boards out there, I've gone & looked but never joined because simply, this is the best.
 
Further on Will's post, we have also had Manufacturers/Developers, Vendors/Suppliers who have come on here, and interacted with the membership in both supporting them and even in gaining their help & feedback to improve products & offerings.

There are other boards out there, I've gone & looked but never joined because simply, this is the best.
And simply irresistible!
 
And they came up with the 'you must take the measured Ah and multiply with 3.2V and you get the correct Wh on the label' - which is nonsense. A main reason to measure Ah instead of Wh is because you can take voltage (and any losses related to that) out of the equation (which I've demonstrated and is on a video on my channel). If they then make claims such as "Ah without nominal voltage means nothing, otherwise we have an infinite Ah battery for you at 0V" (see screenshot above) you've completely lost all my respect and confidence.

I am very confused on this, and I will agree that SFK is the only company constantly says WH everyone else uses AH and so do many review videos. I called them today and they were upset with me on the phone saying I'm causing problems for them from Diy Solar Forum. Not my intentions but it is what it is I want to find out.

So I started asking questions on Quora and even chat Gpt:


Many Electrical Engineers and Professors answered my questions:




Everyone has said the same thing, Watt Hour is the better measurement and you an convert watt hour to amp-hour by dividing by 3.2 or nominal voltage.

Can you point me to literature that would disagree because this seems to be going back and forth and I'm also not figuring out if WH is better than why is everyone always talking about AH.


Seems to me WH should be better because it takes voltage and everything else into perspective.
 
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