PINNED - 230Ah (245Ah certified) A grade cells Amy, Docan

[White Lightnin']

I went back and looked at the order and I need to open the pack of wires to separate them. I didn’t totally understand what he was shipping. The whole works might be there. I’ll check when I get home. Hope Shirley doesn’t get annoyed at me.

[Burgerman]

Its all part of the fun. When you figure it all out, the next one is simple!

[White Lightnin']

Well, I know I have a ZXD, two Pl8, a USB, three white connectors attached to a bunch of black wires, and a blue and yellow extension. Is that enough to charge two chairs?

[White Lightnin']

I received three sets of charging wires, two sets 1 meter long, and one set 1.5 meter long. I'll have to see if I owe Shirley money or if we had a misunderstanding. The fact there are three sets made me wonder what was happening. Part of the fun as BM says.

[shirley_hkg]

You won't find the JST balance leads elsewhere, and you really need ONE spare.

You've paid what you get.

[White Lightnin']

Shirley, I received everything I paid. Thank you for finding the material and selling/sending it to me. I've been reading quite a bit and can appreciate what a project I have ahead of me. Did you happen to run onto a manual for the pl8 cell balancers when you bought them? I could use one about now.

[shirley_hkg]

Manual ?

It's all over the web.


https://www.manualsdir.com/manuals/6389 ... tml?page=3

[Burgerman]

The original

www.wheelchairdriver.com/doomed/

[shirley_hkg]

For those with shallow battery box, that don't want to settle for 100Ah cells neither , new LF168 cell is on shelf now .

[Burgerman]

But 200 wide? And only 0.5C?

[shirley_hkg]

Yes.
Lay on its side, and 200 mm will be the TOTAL height, that even Permobil F5 could fit.

It's 33.2 mm thick, so a row of 8 cells is only 266mm plus insulation.

280 x 225 x 203 (H)

What do you think.

[Burgerman]

I think I have a headache!
What about 0.5C or about 80A max. And at that level, maxed out, will have a much shortened service life.

And the fact that I can really take up to 240A peak from a battery? Not very often, but regularly over 150A plus. A turn in place on a brushless Invacare storm xplore chair for e.g took 190A at battery measured! Where 80 is maximum cell limit.
Thats peak of 2 to 3x more than they allow?

[shirley_hkg]

That are recommended C rates.

Intermittent rates are 2C charge / 3C discharge.

Website says it is for light trucks application.

May confirm with Docan.

[shirley_hkg]

Price of LiFePO4 cells has dropped a lots. Can't resist, so I have 8 CALB 230Ah ones to replace an existing 180Ah Sony 26650 pack.

I paid £160 + another
£30 JK BMS(2A balance).
That puts me back to original battery boxes, which are easy to go in and out the chair.

[steves1977uk]

I've just ordered 8x230Ah Grade A cells. First quote was $2,890! Here's the actual price...

Code: Select all

Hi Steve

Sorry for my typo:

The total cost is $508USD via bank wire , all included:
✔️ $46 ×8pcs EVE 230Ah LiFePO4 cell with welded M6 studs=US$368
✔️ Door-to-door sea shipping: $140
---
*Payment method: Bank wireTransfer. Paypal or credit cards will charged 5% International transfer fees Separately
*Free Gifts:One copper bus bar and two nuts per battery & epoxy boards between battery cells；
*This is a door-to-door sea shipping service, including tax and customs clearance.Estimated delivery time: 30–45 days by sea, then an additional 2–3 weeks for local delivery via truck, DPD, FedEx, UPS, etc.

If all is good for you then please send me your phone number to draft proforma invoice with paylink for you directly

Thank you
Amy Zheng

Who buys Lead bricks these days?????

Steve

[Burgerman]

Yes, ami and docan can supply EV qualiy, A+ grade 230Ah cells that actually measure 244Ah each for much LESS than the cost of a set of 75Ah lead bricks.
And the lead only really give you 35 to 40Ah before you stop...

So the lead is 244Ah div by 35Ah = 6.9 times bigger/better or 6.9x the range for same price! thats really 6x the range with 20 mile in reserve!
And easily 15 to 20 years of useful lifespan, 10s of thousands of daily charges. Compared to leads 400 to 500 cycles, and 1 to 2 years if lucky.

The range increase alone makes them 7x CHEAPER than lead. (Actually a lot more as MK for e.g are currently £299 each!)
The fact that they will last AT LEAST 5x longer in years of use means 7x5 or 35 times cheaper for much better performance!!!

Who in their right mind would buy lead?
NOBODY SHOULD!!! Maybe the clinically bewildered.
I added red, todays exchange rates as of 7 july 2025 to UK pounds.

The total cost is $508USD via bank wire , all included: £373.60
Breakdown:
✔️ $46 ×8pcs EVE 230Ah LiFePO4 cell with welded M6 studs=US$368 £270.2
✔️ Door-to-door sea shipping: $140 £102.96

Set MK gel lead Grp24 is:
https://www.powerhousegolf.co.uk/acatal ... MK011.html
£299 +£299 = £598 plus delivery...

[Scooterman]

I was wondering seeing how the price of lithium batteries have fallen in recent years. Rather than homeowners going down the solar panel feed in tariff route. Especially as feed in tariffs rates are very poor nowadays. And households being at work and not being able to make use of all the energy the solar panel produce during day, particularly in the summer.

SO! what about installing a large lifepo4 pack instead and no solar panels. And then charging it overnight on a cheap EV tariff, then using the energy during the following day and evening when tariffs are high. Especially if dynamic pricing is introduced. The money that would household would normally spend buying solar panels they could spent on life04 cells instead?

Just and idea, not sure if it'd be financially viable cos you'd have to factor in the number lifepo4 cycles and cost of replacing pack every few years?

Thoughts?

[Burgerman]

That works.
If you buy a amy supplied huge pack, ready to go, already bilt plug and play super cheap you can do this now. Replace every few years? Maybe every 30. If you get a pack that is BIG ENOUGH. Its deep 100% discharges, and high voltage charging that limit to 2 to 3 thousand cycles. You get 10k cycles if you limit that to 80% discharges and 3.55V per cell charge.
Or double that if you keep things betwee 90 and 30%.

Thats 20k cycles approx. But that means to end of life. Which is 80% of original capacity. If the pack was BIG thats probably still double what you need...

And yes I have considered that. And I already have solar. So that would feed it too. As for feed in tarrifs, well that depends on your meter...

[Burgerman]

Scroll...

https://www.docanpower.com/china-stock/ ... ttery-pack

Specifically something like this is way more than double my daily usage.
So I could easily maintain it automatically above 50% and never top up beyond 3.34vpc. It would last 10s or thousands of cycles. 1OK cycles is 27 years.
On octopus agile, for e.g at very high power every time they offer FREE electricity or very cheap rates. Charge at say 10kw. You become the cushion that this crazy wind/solar nonsense needs to work and octopus will pay you to do it!

At times, THEY PAY YOU to chare your battery!
https://octopus.energy/smart/agile/

Plunge Pricing pays you to take excess energy off the grid

Across the UK, whenever more electricity is generated than consumed, energy prices fall – sometimes to the point where prices drop below zero, and suppliers are paid to take energy off the grid.

Agile Octopus introduces Plunge Pricing – a world first that lets you take advantage of these negative price events, and get paid for the electricity you use. You'll receive alerts whenever prices drop below zero, and you can use our Agile API to program your smart devices.

Dont think I havent considered this already!

https://www.docanpower.com/china-stock/ ... l-moveable

[Burgerman]

Today want to inform you we have arranged some complete battery pack and good price 3.2V lifepo4 raw cells to our EU and USA warehouse

V19 JK BMS battery pack just shipped by sea from China , will delivery to Houston around September 30th ;Eu stock have not arrange this battery pack so far!

We also support Self-pickup? We're happy to prepare a tailored offer and delivery schedule for you.

Thank you
Docan Amy(Chinese name: Hua Zheng)
For further assistance, please contact Amy Zheng via email at amy@docanpower.com or WhatsApp at +8613530412339.

[elryko1992]

i order 8 pcs 230ah Grade A from Amy for a friend to make a pack with JK BMS B2A8S20P-HC 2A, i found for 25 Euro, 588 USD including ship to Romania from EU stock Germany, i wait today to check with YR1035+ if everything is ok.

[elryko1992]

Amy send me very weak cells, what you think guys? All cells have high and weak 0.1-40-60-80 m0hm and one have 0.2-85 m0hm,

[Burgerman]

Are you sure you measured them well?
All mine were 0.22 to 0.23mOhm.

Dirty contacts? 4 PIN CONNECTION?

Seems very different.
Do they look brand new, shiny clean, with completely flat sides?

If not then see what she says. Ask her for your specific manufacturer test sheet data. You need the details the numbers next to the laser etched sticker.

[elryko1992]

Are you sure you measured them well?
All mine were 0.22 to 0.23mOhm.

Yes i measure more times all the cells and 7 have 0.1+++ mΩ and 1 have 0.2-85mΩ. And i speak to Amy for the first time please send good cells to not have problem. Now i send message on whatsapp and email again, new cells or money back, i pay with paypal. Is not correct. I found Amy DOCAN from this thread, no one was have problem with them?

[elryko1992]

Are you sure you measured them well?
All mine were 0.22 to 0.23mOhm.

Dirty contacts? 4 PIN CONNECTION?

Seems very different.
Do they look brand new, shiny clean, with completely flat sides?

If not then see what she says. Ask her for your specific manufacturer test sheet data. You need the details the numbers next to the laser etched sticker.

No dirty, yes 4 pin yr1035+ and the cells packing very good NEW no problem. But all cells are weak why?

[Burgerman]

No problem, all from her were great.

What does this mean?
1 have 0.2-85mΩ.

0.2 is OK. Whats the 0.2-85 mean??

Do you mean ALL are higher than 0.25mOhm?
Or 1 is higher?
2.85mOhm is shown on the meter. Thats higher than the rest?

[elryko1992]

No problem, all from her were great.

What does this mean?
1 have 0.2-85mΩ.

0.2 is OK. Whats the 0.2-85 mean??

No is not good, your cells have 00.21-22 and all my cells have 0.140 or 0.183 and one have 0.285mΩ

[Burgerman]

No is not good, your cells have 00.21-22 and all my cells have

0.140 or 0.183

Thats better than mine!

and one have 0.285mΩ

thats also super low, not quite as low as the rest. But nothing to worry about.
But your METER shows 2.85mOhm thats different to 0.285. So which is it?

To give some comparison here, that 0.285 still super low.
A bit of cable (wire) or a good connector is about that same level.

A brand new MK gel 74Ah battery is 4.5mOhm. Thats 16 times better than lead! So still super low.

Amy will think you are a bit mad. You are talking about a difference of a tiny fraction of an ohm...

[Burgerman]

Your cells are fine if they read ZERO point 15 to zero point 30 and are all at a similar voltage.

Thats 00.XXmOhms

If it reads 0X.XXmOhm thats TEN TIMES worse. You are confusing the two in your text. BUT Your meter shows 2.XXmOhm...

[elryko1992]

No is not good, your cells have 00.21-22 and all my cells have

0.140 or 0.183

Thats better than mine!

and one have 0.285mΩ

thats also super low, not quite as low as the rest. But nothing to worry about.
But your METER shows 2.85mOhm thats different to 0.285. So which is it?

To give some comparison here, that 0.285 still super low.
A bit of cable (wire) or a good connector is about that same level.

A brand new MK gel 74Ah battery is 4.5mOhm. Thats 16 times better than lead! So still super low.

Amy will think you are a bit mad. You are talking about a difference of a tiny fraction of an ohm...

So… you say i am wrong? Look to page 2 on this thread on your photos with measure and your have 00.22mΩ and mine have 0.285mΩ so mine is with + 1-2 not 00 like yours