Grade A EVE 3.2V LiFePO4 Batteries, 105Ah, 280Ah, USA Distributor!
ฝัง
- เผยแพร่เมื่อ 1 มิ.ย. 2024
- Featured Products: (affiliate links)
EVE LF280K... www.18650batterystore.com/pro... (shipping is NOT free, my mistake!!)
EVE LF105... www.18650batterystore.com/pro...
AIMS 12V Charger... www.currentconnected.com/prod...
JBD 12V BMS... www.currentconnected.com/prod...
Today we'll be taking a look at some GRADE A LiFePO4 cells from 18650 Battery Store. These cells originated directly from EVE, not from Alibaba or similar suppliers. These cells include a 30-day money back guarantee for any reason and a 1-year warranty.
WARNING: Lithium batteries are dangerous and can result in fire! This video is NOT intended to be instructional or a "how-to" lesson. I am not a professional. Do not attempt anything you see here without first contacting a certified and/or licensed professional.
Chapters:
00:00 Introduction
01:30 LF105 Overview
02:25 LF280K Overview
03:35 LF105 12V Build
04:46 LF105 Capacity Test
05:39 LF280K 12V Build
06:58 LF280K Capacity Test
08:03 Internal Resistance
08:52 Pricing & Conclusions
Recommended Stores: (Using these links helps support this channel)
Current Connected... store.currentconnected.com/?r...
Signature Solar... signaturesolar.com/?ref=lithi... ($50 Discount Code "LITHIUMSOLAR50")
Best LFP Source... www.18650batterystore.com/?rf...
SanTan Solar... www.santansolar.com/?ref=lsolar
Battery Hookup... batteryhookup.com/discount/BA...
Batrium BMS... www.batrium.com/
Contact Info:
My business email is lithiumsolardiy@gmail.com. You may contact me for sponsorships, product reviews, business-related questions, or any similar reason. I am not available for personal project questions or consultation. I will not respond to these emails.
NEW Twitter Page... / lithiumsolaryt
Disclaimers and Statements:
► I receive a small commission on purchases made using my affiliated links shared the video description and comments section. The views and opinions expressed here are my own, unbiased, and not influenced by this commission in any way.
► My videos are in no way intended to be instructional "how-to" lessons. I am simply documenting my project for informational purposes. Property damage, personal injury, or death may result, even when following manufacturer's instructions. I cannot be held liable for such damage or injury. It is YOUR OBLIGATION to ensure that you are complying with any local and federal laws as well as code and permit requirements. - วิทยาศาสตร์และเทคโนโลยี
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It's nice to see someone actually offering genuine-looking cells for once.
I like the double terminals on the 280ah cells. Good stuff.
Those are gorgeous cells. Just placed an order. The 18650 store has been pretty good on past purchases I'm glad they're expanding
Seems like great cells and a great price especially for being local! Great job!!!
Finally a decent priced cell for DIYfers ! This is great , thank you for posting
Great review, I also like the bigger bus bars with double terminals, thanks for the info
*Charging*... lol
Another great video, out of all the battery and solar reviewers your my favorite... I love your build videos, always have the right amount of information put together perfectly👌
Wow, didn't expect to see 18650 battery store in this space! Very cool. I order my 18650s from them. Prices with shipping are pretty good but Docan still edges them out. Always good to have options though.
EDIT: Forgot that the smaller cells were 105Ah so cost per Ah is actually better on these!
Thanks for the video!!
Chris Is Awesome. Bought a bunch of stuff from him for my Powerwall
Ordered 4x 105Ah cells. $271.15 out of the door. Not bad. These will serve as 12V ballast pack to power all my computers, monitors and other electronics in my radio shack in event of power outage. Thanks for your review!
Fantastic news, I hope they can keep up with demand!
I bought cells from Amy and Hayley. Top balanced all 160 cells. Their QC ducks! Only one battery out of 10 made it past 3.5V/cell without a 280 mV imbalance or runner over 3.65V. Even my Trophy 220aH!! The one with the JK BMS 2A balance does okay. We should not have to install a 5A balancer on new "Grade A" cells. SunFunKits claims true Grade A. I will try 18650 store.
Thanx for what you do Patriot
Very interesting video, well done and useful info. Many thanks.
Good review good to see sellers in the us
I bought 16 of the 280Ah batteries the day after you published this video. These makeup my third bank of 280 eve cell's.
I capacities on just 2 cells, both come out over the 280 but below the spreadsheet numbers.
Have had this group of cells in service for about a month. Seems to be working OK but always pulls less current then the other two.
What was the price when you ordered?
Wow, glad I saw this video, this company is local so I can do a pickup
Thank you. This is really good. I have been trying to get a good supplier for EVE batteries. I have ordered today for their 2 packs of 12V/105AH. The cost is same or better, and the shipping to Canada is less than $100 through FedEX, Compared to $ 180/- through Ali Express and long wait time by sea freight.
I don't think there are any trustworthy distributors on Aliexpress. That's just my opinion though...
Hey Ajeeth it would be really cool if you would post back with your experience having the cells shipped to Canada Im looking at buying a large quantity of the 280ah cells I’d be interested in your experience.
@@LithiumSolar I received the brand new EVE 3.2V/105Ah x8 batteries within 2 weeks to Canada from 18650 battery store, USA.. Excellent service and price, and shipping through FedEX. Still waiting for the JBD 4S BMS from Ali Express, more than 3 weeks. Thank you for posting your video.
Ordered the 280 ah batteries on Thursday. Received them on Saturday. 4 boxes. (16) cells. From GA. To Michigan. Regular shipping. Very very fast!!! All in excellent condition. All shipped at 3.28 volt except one cell at 3.1 . Very happy so far. Need to top balance and all. Will give update once installed. Thanks for a good supplier.
Awesome! Please keep us updated once connected/installed!
Can u give update on your batteries? Do u still recommend
Batteries are working good. One cell seams to always be higher at lower charge but when at higher charge is lacking behind. Tried to make better connection but still dose same. Other than that, very happy with them. Getting them in 2 days is a big plus. But I see the price has gone up a bit sense purchased. All and all, still think they are a pretty good deal.
you are so lucky man! normally Chinese online shop always ship used to customers...
Thanks! Stay charged and positively synergized! God Bless Amen
Raining in Kentucky and our 132 kWh bank is at 87%.
EXCELLENT review & info...
Wish you posted the timeframe involved with the discharging...
reasonable and considered, fair conclusion
How do the buss bars fit when going from two cells placed next to each other on the end of the cell? So the series connection from 8 cells to the next 8 cells when they are in 2 rows of 8. Hopefully that makes sense.
Om Ah Houm
Thanks for all these great contents! Cheers!
I ordered 18 they are pefectly matched i load tested NO BMS recharged and they were still matched very well.
these 280Ah cells are so beautiful.
I love them so much
unfortunately in my country there are no such suppliers providing such a good price and genuine good products
and i do not trust alibaba or aliexpress or any other site cause there are so many listings that i got confused and do not want to loose my money on some bad cells so yeah i hope one day i will order these
What country are you from? There are many good sellers on Alibaba. You just have to spend some time reading through reviews - that are posted on forums and other places on the internet, not Alibaba reviews. You just have to weed out the 20 bad sellers to find the 1-2 good ones.
@@LithiumSolar I am from India
I just ordered 8 of the 280 cells. They price was 150 each and they charged 60 bucks a box for shipping. I asked about the free shipping you mentioned but they said no free shipping
Those batteries are pretty nice I might have to order those instead I like that terminal much better than the welded stud thing
Ok yeah I ordered 16 280ah of these looks great
When these blue boxes are used in the various batteries you tear down, are these all the same type of cell, prismatic?
Hey ive got a question to use those 105ah batterys how long were you able to run it ? Im thinking about getting these for my caravan .
I see a lot of these style batteries set side by side in a box, but the space i have available is tall and skinny. Can i stack them verically and run a longer wire instead of a bus bar? Or is there voltage loss through thr wire?
Just as cheap to buy the power queen 300ah already made boxed with 10ah more. Once you include bms etc.
just bought a set of the small ones, shipping is not free ($37 to CA.) I did find a working discount code that saved me $7 I was also surprised that they do not collect tax which would have been another $25+
Thanks for testing these batteries. Did you do any test on DOCAN power shipped from Texas?
No, I've not worked with Docan at all.
Our cells are brand new with original factory QR code intact. Never used. No dents or swollen cells, 5-year warranty, with free bus bars and screws, we test the voltage, capacitance and internal resistance before we ship the goods to you, EVE 280K only requires 109 USD from EEL BATTERY
EEL BATTERY - have you contacted me via email? I've seen you comment a few times but don't recall seeing any emails from you.
Cheapest 12v 100-200ah for inverter use? In garage? Make it yerself or buy complete?
Hi, thank you for all the videos you do.
I have 32 x Eve 280ah cells on the ship to me.
I am wanting a good bms.
I have Victron multipus 5000.
so fully loaded i am needing close to 200amps discharge.
I also have 24solar x 330w panels on my roof, running through 4x victron 150/85 mppts to charge my 12x 2v @ 1250ah gel batteries.
I believe the LF280k has a1c charge rate.
Is there a bms that can handle 250amp charge?
I am considering charging the new lifepo4s from 18 panels and 3 mppt, each supplying around 80amps in good conditions, therefore 240amps.
I used Daly 200amp in my bus build, but that is only charging at 40amps though house power supply.
I need heavy duty for my off grid shed but can't be sure which bms to choose for high charge solar.
What's your thoughts?
Seems like a Great price!!
Can the 280ah cells be mounted end to end with the buss bars there? Given the side by side threaded holes I’m not sure
Thank you, sir.
nice test video
I’m trying to build a 36v battery (12 cells) with the 280Ah cells…I’m powering a trolling motor with a max draw of 52A…what type of BMS would you recommend?
Do you have any content on using these type of cells in say an RV?
Do you think the lf280f would work to run a Curtis Ac50 motor with 38 in series for 120 volts wit max current 500 amps? I was also try to figure out how to do a bms with 22 batteries in back of car and 16 in front
does fiberglass tape provide enough compression for these cells
Curious that the 105Ah batteries show 3500 cycles, but the 280Ah batteries claim over 6000 cycles.
Usage? Chemistry?
The LF280 are also only rated for 3500 cycles, but the LF280K (!) are rated for 6000 cycles. EVE's website doesn't say what the difference is, though...
Tks for the video. In order to use the maximum cycle of the batterie it is showing on the data sheet to use it from 90 to 10%. of course the remaining capacity will be around 80% ...but do you have any idea which are the setting on BMS to get the maxs cycle? Max voltage charge and minimum voltage when discharge? Tks
Raf from France
Thumbs up and subscribed!
It's a great deal including US shipping about 50...
The small size batteries compared to SOK 48v 16c (1600 $ if I am right) will have a cost of 1000$ plus bms and box. Pretty good deal.
16 of the EVE LF105 is $1053 shipped. Add in another $200 for a quality BMS of your choice, maybe $10 in cabling and you're looking at $1263 compared to the $1739. You don't get a the heavy duty steel case though. It's up to each person what their needs are and their level of wanting to DIY something.
Thanks!
Why you discharged packs to 0.2C ? is it the default continous discharge specification or because its cold atmospher at your place ? Thanks
while i dont know for sure, i assume its the rating the manufacture came up with. unless you know something i dont, which is possible. i have been playing with lipo for years, lead acid for about a year, but have no lifepo experience.
I use 0.2C as it's the industry standard for capacity measurements. That said, many of these big LiFePO4 batteries have standard discharge rates of 0.5C or 1C. I still stick to 0.2C so there is a fair comparison across the board in addition to it being a better reflection of how I see them being used in the solar/off-grid space.
Hi, for 16 pcs 280Ah eve LF280k in 24v configuration what kind of bms do you recommend (I need two, one for each 8s). I want your professional advice. Thanks. Greetings
I think I'm gonna order 16 280 cells today. Can you recommend a 24 volt bms that is good but that does not take a genius to set up? The bms will need to run a 4000 watt sungold power inverter. I'm not sure what Amp bms I'd need but I want it oversized for sure. It might be best to have 2 bms with 8 cells on each one. Any help is greatly appreciated
Pardon the newbie question, but would it be possible to build a pack with the cells "flat"?
I guess what I am asking is do these cells have any type of orientation restrictions?
I've been told before that any orientation is acceptable other than upside-down (vent pointed to the floor). I have no supporting evidence for this though and would suggest double-checking with the distributor or EVE directly though before doing anything.
Yes, either standing up or on their side but NOT flat. If flat half the battery is out of the liquid.
quick question, if i wanted to wire for 12v inverter, how many cells would i use? 3 cells seems too low, and 4 cells seems too high. i think my 12v inverter shuts off at 10.5 volts on the low end and 15volts on the high end.
perhaps there is something i am not thinking about? thanks again for the video btw
oh, i see the voltage range of lipo is not what i thought it was, 3.2v nominal, 2.5 is 0% soc, and 3.65v is 100%, i assumed 4.2v was the 100% soc resting voltage
3.65 is fully charged. This is not Lipo this is LifePO4. Lipo go boom if handled by dummies
the charge/discharge and voltage display what brand? where can i buy? is that specific for BMS brand?
interested where to buy the big coulomb meter display… need big monitoring voltage display
Watch this video th-cam.com/video/wKTXJidnfl4/w-d-xo.html
what do you think of the samlex evo series inverters? not much info out there about it i find, at least not relative to recent competition
I don't have any experience with that brand unfortunately.
I have the 2224 and the 4024 and I love them, they run my house and shop. The 2.2kw has no problem running 2 horsepower lathe, mill, and tablesaw (one at a time). Great build quality, lots of programming. You don't hear much about them because people don't have trouble with them so no need to ask forum questions, and they don't sponsor TH-camrs.
@@bobaloo2012 they seem nice of a bit long in the tooth without the bells and whistles of victron - has there been any modifications to make them function with Bluetooth? Was thinking about them for use in an rv, could be useful
What about M. Li - battery lifepo4? Are they good?
I priced a build for a 100 amp 48V battery, and with a quality BMS and case and cb, it was about $1,450. The Jackiper is $1,699, the EG4 is $1,499. Your shipping cost may vary, but seems like there is not the big incentive to build a 100ah 48v battery anymore. Building a 280ah 48v saves more.
Free shipping helps but the price is still too close to already built options in my opinion. I think the last set of 4 chins 105ah batteries cost me $1290. to my door. I have 2 sets of 4 chins, and 2 sets of 4 of the zooms batteries. Always bought 4 at a time and never broke the $1400. mark. With the exception of an over priced Hsky 48v battery I bought from Big Battery. They were the only place that had anything available at the time when I needed it. I would have loved to go the server rack route but they were always out of stock and on backorder.
I agree there isn't much incentive when looking at the 100Ah batteries; however, cost changes quite a bit when looking at larger cells such as the 280Ah.
Very interested to order some, new at this but 4pk of 280ah @ 3.2v is 3.584kw? I am looking to build a power wall with 10-15 kw to support my house in case of PG&E outage.
Yes, a 4-pack of 280Ah batteries would be 3584Wh (3.2V nominal x 280Ah x 4pcs = 3584).
Batteries like these work great in power wheel chair and will out last the power wheelchair itself:)
Hi...if using 6kw high frequency battery charger,with rema320 connector with CAN bus protocol..is that any bms come with can bus connection? Or any can module that can coordinate with bms and the charges
Unless the BMS manufacturer follows a standard, you might wanna check to see what modules they have to support CAN Bus.
Which is better option for the money overkill or JBD bms?
Both. The BMS that Overkill sells are JBD-brand :)
I've been waiting for US suppliers to show up. Couldn't pull the trigger on a multi thousand $ order from sketchy companies.
Docan Power has been awesome. I've bought 64 of the 280k cells from them and all have been perfect, coming from Texas.
i agree, plus i cant wait 2 months for a shipment, plus what if one is bad? buying from china seems like a game of russian roulette
@@jasonbrown467 standard practice has been for every order of 16 cells to buy a spare. The extra cost is nothing compared to dealing with the fact that you are now unable to create a 48V pack. Now with a US Supplier and a warranty..
Excellent video, very informative. As for the 280 ah batteries, could you please, explain to me how to connect 8 of these batteries to make 12v 560 ah battery bank? Would I need 2 BMS's? Thanks in advance.
So 4 of these batteries cells would create you a 12v battery pack thats why they sell them in 4s because they are 280ah 3.2v each when connecting all 4 it creates your 280 ah (3.2vx4=12.8v battery pack) so if you bought 8 you would be able to create 2 battery packs so you'd have 2 280ah 12v battery packs and depending how you run them in parallel or series you could have a 24v 280ah battery setup or keep in 12v depending on what type of inverter you are running and id run a bms for each battery pack you create. Hope that helps a little im still learning all this myself Goodluck brotha
Will there do well with car audio
nice video these look like a very good quality and decent price batteries. so how much is the shipping for the 280 amp do you know ? thanks for your time
I ordered mine from their warehouse in Georgia to las Vegas it was $51 or 2 batteries shipped for $69
These be ok for car audio on a 12 volt system
Hello I am not an expert I am planning to use your link to purchase 8 of those LF280K batteries to use it with a 24v solar charger controller.
My question is will I need a JBD controller??
You will need a BMS with any lithium battery. It doesn't have to be the JBD that I used, there are a lot of options on the market now.
@@LithiumSolar Thank you so much what is your opinion about JK BMS 4-8S
Good day. Please we have a very common company here in Africa that is making lots of name called Felicity. Can you please do us a review of their battery
You mentioned that they offer free shipping. I contacted them and placed a order but they said that it is not free shipping! Just wanted to let you know that.
Thanks, that was my mistake. I can't correct the video without deleting and reuploading; however, I made a note in both locations where the links are.
These look intriguing, and would be a great science project for my 10 and 11 year old boys. We already built a mini solar generator using 28 ah lifepo4's 2 in parallel. Being retired makes the cost point sweet as well. I get the putting the 4 cells together and the bms and even the balancer. What I don't get is how to put these cells into a working form as a common battery -- or what this 60 plus year old knows what these batteries could resemble. Any help would be appreciated.
th-cam.com/video/X_ucHHnh4Ik/w-d-xo.html&ab_channel=SolarEngineering
What do you mean like a common battery? Like a typical 12v lead car battery or what type of common battery are you referring I may be able to clear up a few of your questions
@@kingsamoanOG Thank you so much. This uses the anderson sb175 quick plug in for connection rather than the positive and negative poles you screw a bolt into to make connection to the battery. Is there a way to bypass the anderson 175 and have just 2 poles like a car battery? Wish I could post a picture, hundreds of batteries like the normal 100 ah lifepo4's that demonstrate what I am speaking about rather than the anderson 175 connection. Thanks for assisting.
@@Guardianwill I would imagine anderson or some other company would make an adapter it probably won't be your typical poles but I'm sure they have some sort of +/- adapter with just leads coming off. I'm not familiar with anderson but other companies make these adapter with just wire +/- leads coming off the plug
i am older than you and now i am intrigued;
What do you mean "put these cells into a working form" ?
Once you assembled the series of 4 with the BMS,you're done; it's a battery; no?
Do you have a link for the top balancer?
Just curious,,is your power inverter pure sine wave ,,,or modified sine wave
It's modified sine.
It's a very good deal if it's shipping locally for you. However those 105Ah cells that you bought by yourself didn't produce 105Ah, isn't it a concern? I have those cells from a reseller, but it gave 106-107Ah capacity on my initial test. The cells you have may be imbalanced or there is something wrong in the quality. Please check. Thanks.
also called margin of error...it was 105Ah...dunno what you're complaining about.
@@TheGuruStud Yes margin of error should be over the rated capacity for a Grade A cell, not below it. That's why we should always get over the rated capacity for the first few cycles when tested if the cells are really Grade A. It is the industry standard. I am not asking for anything out of the ordinary. Thanks.
Good point for a Grade A it should be over that 105ah
This really makes me question my preorder of the 48v SOK server rack battery. The price point here is much cheaper.
Please tell me what it mean on BMS 24S15P
Nice video! The cells look good, but I Just put 8 280's in my cart and they want to charge for shipping now... I think I will wait. Is there a secret code for free shipping?
Oh man, I messed that up... I just checked my receipt and I did pay $18.65 shipping on the LF105. Ooops...
Yeah they charged me 51.86 FedEx 2 day
@@TH-camviolatesmy1stamendment ok, that shipping price still isnt too bad, i was thinking it would be $150 or something crazy, $50 for 8 cells doesnt seem bad at all
@@jasonbrown467 hey also I ordered mine not 20 minutes after this video come out and it has already shipped
Nice to know …
This is good news.
Their 105Ah x 4 -= $300 & that's w/o BMS or case. Walmart has 100Ah Lifepo4 full battery with BMS & CASE f/$275. Easy choice between the 2 for me.
I need build 1 for my trolling motor , do I need a bms ?
Yes, absolutely need a BMS for any lithium battery.
EVE LF280K... www.18650batterystore.com/products/eve-lf280k/?rfsn=7256878.31271b9 (affiliate links)
EVE LF105... www.18650batterystore.com/products/eve-lf105/?rfsn=7256878.31271b9
Please let me know what you think of these batteries and/or if you have any experience with this store!
Edit: Shipping is NOT free, my mistake... I must have been thinking of same-day shipping.
Still not bad was 51.86 FedEx 2 day for me just ordered 4 4set 16 cells
do you have pictures of what vent corrosion or a vent that has vented looks like?
These links don't seem to be working young man. Thanks for the video....
@@Guardianwill Links have been corrected, sorry about that and thanks for letting me know :)
@@LithiumSolar Thank you. Just trying to help.
The double terminal is interesting. I have never seen that before. On the main pack pos/neg you have the main leads and balance leads on separate terminals. If i wanted to run 2 main lead cables, one on each stud, is there room on the stud for the balance lead and a main power lead?
No reply from LS. Has anyone else used these cells that could comment?
Yes, there is plenty of room for multiple cables under one bolt. Even if there wasn't, you could just get a longer M6 stud.
Will these do well with car audio???
This is not designed for use in car audio applications.
@@LithiumSolar ok thanks
I was under the impression that these were 3.2v 280ah hr batteries each. Shouldn't 4 hooked up become 12.8v 1120ah. But the test still has them at around 280ah
When batteries are wired in series, volts increases and amp-hours stays the same. When batteries are wired in parallel, volts stays the same and amp-hours increase.
@LithiumSolar Thanks you for explaining.
Can these EVE LF280K battery be stacked 8 pieces high?
I am putting them in a group 27 lead acid battery box there's room for them plus the BMS is inside those as a 12-volt battery and you could stack those on top of each other
How do these compare to Docan in America
I bought 4 cells from Docan and two of those were heavily bulged even when fully discharged. Capacity is also < 280ah for all cells.
I'm considering a purchase to buy one of the battery genny's out there, most likely, just a mid-level one making 1800watts. I noticed most offer a similar looking unit as a secondary battery but they're pretty pricey. Has anyone built their own using these batteries to piggyback off the store bought battery genny's out there?!?!? Successful???
They went up in price and only a 1 year warranty? You just posted this 4 weeks ago. I have seen some give 10 year warranty for defects or product fail if not abuse or misuse or normal wear, basically about the same time as the number of cycles. Battle Born American company is one of them, though quite pricy.
I know you are not the one that has anything to do with that but in a way you are advertising their product.
18650 Battery Store is not manufacturing this products. They're a distributor. It doesn't make sense for them to provide the warranty on the product. The 1 year warranty is plenty sufficient in my opinion. Battle Born is a manufacturer for which the cells they use are a component of the product they create. It makes sense for them to warranty their product for longer. Additionally, 18650 Battery Store warned me ahead of time that they were considering a price increase due to the ever-rising cost of everything.
Shipping is not free for the 105 AH batteries too.
Yeah I posted a note about this next to the product links. My mistake...
@@LithiumSolar sorry I didn't see it. Still a good deal shipping from the USA
Does anyone make a good inverter box with a charging input, balance board, and 12v and 5v outputs that I can simply drop four 3.2v 105Ah cells into?
It appears the links for the charger and bms are no longer valid.
The BMS has been discontinued. The chargers will be back again soon. I'm told there was a QC issue with one of the batches and they removed them while it was being sorted out.
@@LithiumSolar yep. I was just letting you know the link was bad in case you wanted to change it
Where can I get the 304 eve
SunFunKits has the 304Ah EVE batteries. They're another quality US distributor. You can find them here www.sunfunkits.com/product/37/4-pack-eve-lithium-lf304-304ah-certified-automotive-grade-33v and use my referral code "LS10" for 5% off.
😎👍
Is lf105 battery rated for 1c
Specifications document LF105-73103 Rev. A gives the LF105 a standard charge/discharge rate of 1C.
£149.00 each in 🇬🇧grade A eve 280ah with 10 year warranty.
Something is not adding up here... 3509 Watthours / 282.40 = 12.425 Nominal volts or 3.106 v/cell. Nominal voltage for LFP is 3.2 volts. So it should be 3509 / 12.8 = 274.14 AH / cell.
It should have tested to 3584 watts / 12.8 = 280 AH / cell. I think you took the out going amps as the capacity instead of calculating capacity based on the watt hour which is to divide total watt hours / nominal voltage.
Nope. Read my reply to your other comment.