A123 Cells Welded into custom configs $6.50 per cell

Hi,

swbluto said:
Well, I was wondering what made you think they're happy with their purchases because I haven't seen any reports yet(Although, understandably so because, as johnhobholmes says, he'll buy them all. :lol: ).

Its been about a month and by now if it was a rip off I expect they'd post it.

johnrobholmes said:
I actually have a good bit of the 3.2ah k2 cells. Decent, but less than 25% of my batch met the resistance values of the spec sheet. 25% of the cells were over by 10% from the start. They sure as hell didn't match them for me.

It sounds like we can count on John to test them and be sure of the quality.

Also buying via CC is very safe. My CC Company is always willing to issue a refund if I'm displeased and I return the item (proof of shipping). Some CC companies don't even require returning the shipment!
 
my first batch of 96 cleared customs and should be in the assemblers hands this week. The second batch of 100 is sitting in customs by now most likely.


I sent him balance taps, and he was very familiar with the setup. I guess he does RC stuff too.
 
I noted at the automotive forum that his present supply should last through the summer. Can't wait to see how these decently prices cells operate in regards to balance etc. Maybe I could make a 4S5P 12.8V booster pack to bump my 32V quad Dewalt pack to 44.8V when I need the extra juice. Throw a basic BMS and use an automotive charger for the booster?

$130 for the booster pack + BMS, something to think about.
 
Anyone receive yet? I'm about done waiting...Calling the CC company again on Monday unless I see a tracking number.
 
magudaman said:
Anyone receive yet? I'm about done waiting...Calling the CC company again on Monday unless I see a tracking number.

I knew it... :( Just sounds too good to be true :roll:
 
(found this thread from the similar one on the DIYElectricCar forums:
http://www.diyelectriccar.com/forums/showthread.php?p=134582#post134582
which I had just discovered and hoped vainly to be real)

Based on the threads I found for Wakinyantanka on the DIYElectricCar forums, I am not surprised. None of the previous group buys or offers he started had any resolution. As I said on that thread, it disturbs me that in half a year Wakinyantanka was unable to buy or borrow any kind of camera long enough to take a few pictures, or even to lay some cells on a flat bed scanner to get the label portion scanned in and posted. Pretty odd for someone trying to do business with a supposedly good reputation for 30 years (according to his own claims in prior threads).

Interesting that he protested so very hard against people "dissing" him in those previous threads, yet resolved none of them, and now this. I can see why he hasn't even posted there since very early July, and that it was about two months prior to that when he'd posted last (and not in his own A123 thread!).

I don't like "bashing" people, but providing what truth can be found about apparent scammers is something I greatly believe in.
 
(crossposted from DIYElectricCar forums)
I just got a reply via email from him saying I could pass on the info he gave, and he says he apologizes for not updating the thread but "been extremely busy and have not had an opportunity to get to the site in a while".

The prices apparently still hold valid at $6.50/cell as he did not mention a new price in his reply to me, and I had quoted that price in my email to him. That price is for bare cells or for assembled packs, so even if you do it yourself it won't cost any less. I'd asked about it referring to expecting a cost of $286 for 44 cells assembled as 11s4p for my ebike pack, giving me about 36.3V@9.6Ah, which sounds like a fair enough price compared to some of the (probable) junk I've seen on ebay for a lot higher price.

He did not mention any additional costs for shipping and handling, and I forgot to ask in the original email, and have asked a separate question regarding that.

He also sent some photos of his welder setup and of a unit being assembled, which I've attached to this post. The two photos of the battery pack are very low resolution and very small files, while the welder photo (with cells setup on it) is very large and high resolution (nearly enough so to read the labels on the cells). I had to make a 33% size version of that photo in order to upload it, so I also uploaded a cropped version of it with just the batteries at the original resolution, which fits within the forum limits for filesize.

The cells do appear quite similar, perhaps identical to, the cell photos posted previously by someone else in this thread.


He said he could make the pack for me whenever I am ready, and I advised him I am holding off on the purchase until he resolves others' expectations at this thread, including the promised but never delivered photos (of which i do not count the ones he sent me directly that I have attached here).

I do not trust anyone easily, as I have been "bamboozled" before. Even if someone had a good reputation and did not appear "flaky", I would still require time to ensure trust before I purchased, especially considering that my entire emergency fund for at least the next year would be going into this purchase (meaning that should *anything* bad happen, I would be out on the street without a home because of it, since I'd have to use my rent and/or utility/bill monies for the emergency instead).

(The only reason I am even considering this purchase is because my ebike *is* my transportation, and if I have to keep using the two (or three) 23-pound bricks of lead I use now, I will not be able to build/use a lighter bike and thus am restricted to short-range (7mile roundtrip) destinations if I have heavy cargo to move, or the weather is hot, kind of common here in Phoenix AZ. Pedalling all that motor and lead, about 60 pounds worth, plus 60 pounds of bike so it doesn't break from the batteries+cargo+me, all the way home from outside that 7 mile radius should the batteries get too low is very difficult even under the best of conditions with my bad knees--it's why I am using the motor in the first place!)
 

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So how are the cells checking out? He contacted me a couple days ago and said that he was waiting for a couple new cells since there where ones he was using that were reading low (not sure voltage or Mah).
 
I bought 240 A123 new green cells from olympics (on Ebay)
They are new and they work great. I made a mistake when measuring at BMS connector and my fluke probe as been changed in solder :?
I paid 1440$ US for this, including shipping so it.s a very good price.

I tested every cell and all of them had near the same value (3V3)
Charging them (with TpPacks BMS) show they have about same power too.
 

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Well I received my packs and there looking ok so far. I am still on a business trip and will be back on Wednesday and will start testing them out and post up some graphs. For a teaser I have a attached photo. Check out the burn mark on the right pack, looks like I need to be doing a little investigation to make sure that didn't happen from some form of electrical means.

Just another worrisome note also was the guy putting these together said (over at the DIY electric car forum http://www.diyelectriccar.com/forums/showpost.php?p=140294&postcount=100:
Another note we are no longer using the reclaimed Dewalt cells,(they move around inside those card board sleeves and create problems in are cnc welder), and are using brand new green pvc sleeved A123 cells.

Which contradicts what he said in his first post on that same thread:

These are new matched cells, not seconds or reclaimed dewalt packs.

Testing is upcoming and we'll see.
 

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And my own post following yours from DIYElectricCar, for the advisement of people on this forum that aren't on the other one:

magudaman said:
Does this mean these were reclaimed cells from dewalt packs?
wakinyantanka said:
Another note we are no longer using the reclaimed Dewalt cells,(they move around inside those card board sleeves and create problems in are cnc welder), and are using brand new green pvc sleeved A123 cells.
According to the opening post on this thread:
wakinyantanka said:
These are new matched cells, not seconds or reclaimed dewalt packs.
So kinda contradicting. :mad:

Also in other posts he had said that:
wakinyantanka said:
I was informed that this pricing will not last, the shipment from which I am receiving these was purchased directly after the GM contract went south and A123 needed quick capital. They have now returned to their pricey ways.
and:
wakinyantanka said:
I wanted to update everyone on these modules. I have secured a steady supply and have decided to go into production.
Nowhere in anything else in this thread nor what he had replied to me in my inquiry was it stated these were reclaimed cells, probably "used", thus implying that they were still the new cells they were stated to be at the start of the thread.

This deception makes it impossible for me to ever trust this person now, whether he is now using "real new" cells or not. Because who knows if the "new" new cells are really new, or even real. It was already hard enough to begin trusting, based on prior abandoned threads about various offers, but now.... So no orders from me to this person, ever, even if I ever get a better job to let me afford them.

It's people like this that make it so hard to trust anyone anymore. :mad:
 
I can't recommend this seller now. Upon finally getting to a point to test the packs out, the construction is shoddy at best. Welding is inconsistent, balance taps were incorrect, and in general it is just a hot mess. I am glad I got plenty of loose cells too, it looks like he may have burned through some of the cell jacket trying to spot weld them. Boo boo boo, that was a good bit of money to waste.
 
johnrobholmes said:
I can't recommend this seller now. Upon finally getting to a point to test the packs out, the construction is shoddy at best. Welding is inconsistent, balance taps were incorrect, and in general it is just a hot mess. I am glad I got plenty of loose cells too, it looks like he may have burned through some of the cell jacket trying to spot weld them. Boo boo boo, that was a good bit of money to waste.


Damn...disappointed to hear that was sounding almost too good to be true...apparently it is :: sigh ::

theyerb said:
Hmmm, I didn't know there was another established EV community with a following like ES... and the DIY Electric Car Forum is eerily familiar. Is there any affiliation between the two?

I just discovered a very active EV forum right here in Australia each state even has regular meetings so members can view and catch up on others projects.

Have a looksee when you get time very friendly mostly car and motorcycle orientated but there are several members (myself included) with their e-bikes.

http://www.aeva.asn.au/

KiM
 
My update:

Checked out the pack and the cell welds were junk, on initial inspection I had found a total of 8 completely non connected tabs. The welder looks as if it was turned way down so if they are connect it took just a pull of the nail and it would pop right off. After paying for shipping to me and return shipping I just asked for a full refund and ended up taking a loss on the pack of about 50 dollars. Lesson learn, if it is too good to be true it is. Maybe if you were getting bare cells and didn't want to pull the tabs off the dewalt pack yourself then its a good deal but otherwise stay away.
 
Me and my buddy went through and fixed the packs, there were indeed a lot of cells not even connected. He offered to fix the pack, but I wouldn't trust him to it. The balance taps were all screwed up too.


Now we are charging them to see if there are any hidden damaged cells. Wish us luck, there are plenty of places where dead ones could lurk.
 
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