DUMFUME 300AH Happy Surprise

[dude47]

I purchased 4 of these on temu. Looking at the dimensions , specs and physical appearance I believed they were likely a relabel of the Wattcycle brand batteries 300mini (280ah). I figured the manufacture was likely trying to offload some of them under some under another name. With temu's super coupons (if you have ordered from them they have this really cheesy deal where if you make purchases they give you coupons to make more purchases) the cost I paid for all 4 was $850 OTD with two purchases with $150 off $500 coupons.

They arrived today and I couldn't help myself, after I got the kids dinner I had to pop one open. Lots of glue, after 30 minutes of prying I was able to get the lid off intact. What I found was a massive surprise as I was expecting 280ah cells like the Wattcycle, thinking if I got lucky I maybe would have the 300ah cells like labeled. I found neither....

314ah Eve cells...




I am flabbergasted... Maybe they are Grade B? How can I tell?

They shoehorned these cells in the case. Only foam block is on one side with the BMS and the top. The bottom, sides(thin pad), and back of the cell packs rest against the case firmly. I will charge one tomorrow when I get home from work and do a capacity check.

@Will Prowse Have you ever seen cells with higher capacity than what the manufacture labels?

Can anyone ID the BMS? It has a nice sized heatsink on the back of it.

 

[robbob2112]

Link to the batteries?

 

[underdog5004]

Great teardown and pics.

It's "shoe horned", not "horse shoed", btw.

 

[dude47]

Great teardown and pics.

It's "shoe horned", not "horse shoed", btw.

Yea that is what I ment I was trying to type everything out fast while my 4 and 6 year old were jumping all over me

 

[dude47]

Link to the batteries?

I just looked on temu and it says sold out if you go on their website and search dumfume 300ah it is the first that comes up. Amazon has them for $359.

https://www.temu.com/-12v-100ah-lifepo4-lithium-battery-with-built-in-100a-bms-1280w--to-15-000-cycles--rvs-boats-trolling-motors--grid-systems-g-601099745858433.html?_oak_name_id=8201183626119948748&_oak_mp_inf=EIGnzoan1ogBGiA4Y2YxZWQ2MmUxMGY0MzI5YjBhZjk1ZDAyNWUxMzRmMCCOutWCyzI%3D&top_gallery_url=https%3A%2F%2Fimg.kwcdn.com%2Fproduct%2Ffancy%2F8f2efed4-9884-4b89-b646-d2f971443b52.jpg&spec_gallery_id=601099745858433&detailDealsRecEnable=true&refer_page_sn=10009&refer_source=0&freesia_scene=2&_oak_freesia_scene=2&_oak_rec_ext_1=MTEwMjQ&_oak_gallery_order=2032170814%2C350900614%2C756920715%2C663526876%2C533163440&search_key=dumfume%20battery%20300ah&refer_page_el_sn=200049&refer_page_name=search_result&refer_page_id=10009_1738125160304_mm39l37v4x&_x_sessn_id=nxgdz95v9h

Amazon.com

 

[robbob2112]

You are truly an evil person for posting this around me.

 

[robbob2112]

$284 each... x 4... now it need BMS to make 24v batteries....

Can you take pictures of the top of the cell so I can see how they are connected and balance wires attached?

 

[robbob2112]

I just looked on temu and it says sold out if you go on their website and search dumfume 300ah it is the first that comes up. Amazon has them for $359.

https://www.temu.com/-12v-100ah-lifepo4-lithium-battery-with-built-in-100a-bms-1280w--to-15-000-cycles--rvs-boats-trolling-motors--grid-systems-g-601099745858433.html?_oak_name_id=8201183626119948748&_oak_mp_inf=EIGnzoan1ogBGiA4Y2YxZWQ2MmUxMGY0MzI5YjBhZjk1ZDAyNWUxMzRmMCCOutWCyzI%3D&top_gallery_url=https%3A%2F%2Fimg.kwcdn.com%2Fproduct%2Ffancy%2F8f2efed4-9884-4b89-b646-d2f971443b52.jpg&spec_gallery_id=601099745858433&detailDealsRecEnable=true&refer_page_sn=10009&refer_source=0&freesia_scene=2&_oak_freesia_scene=2&_oak_rec_ext_1=MTEwMjQ&_oak_gallery_order=2032170814%2C350900614%2C756920715%2C663526876%2C533163440&search_key=dumfume%20battery%20300ah&refer_page_el_sn=200049&refer_page_name=search_result&refer_page_id=10009_1738125160304_mm39l37v4x&_x_sessn_id=nxgdz95v9h

Amazon.com

Sold out now

Try this

https://www.temu.com/goods.html?_bg_fs=1&goods_id=601099948707588&parent_order_sn=PO-211-12324013304873486&add_order=1&sku_id=17594033627202&_x_sessn_id=0dhaixymdb&refer_page_name=bgt_order_detail&refer_page_id=10045_1738125396344_fk0s8o0exq&refer_page_sn=10045

 

[dude47]

$284 each... x 4... now it need BMS to make 24v batteries....

Can you take pictures of the top of the cell so I can see how they are connected and balance wires attached?

Oh yea there is another listing for 284, now that you bought them they will send you a coupon for 150 off lol

https://www.temu.com/12v-300ah-lithium-lifepo4-battery-200a-bms-3840w-rechargeable-lithium-iron-phosphate-battery-15000-deep-cycles-for-solar--backup-power-rv-camping-g-601099948707588.html?_oak_mp_inf=EISeq%2Ben1ogBGiBmNDQzYmI3ZWEyYWI0YzRmYWZjNmQ0YzI5M2NkZGI4MiD8keWCyzI%3D&top_gallery_url=https%3A%2F%2Fimg.kwcdn.com%2Fproduct%2Ffancy%2Ffe0f6746-08dd-45a6-a6e2-43c5edd17a31.jpg&spec_gallery_id=3525510385&detailDealsRecEnable=true&refer_page_sn=10009&refer_source=0&freesia_scene=2&_oak_freesia_scene=2&_oak_rec_ext_1=MTEyNzg&search_key=300ah%20lifepo4&refer_page_el_sn=200049&_x_sessn_id=hcbrjqip2u&refer_page_name=search_result&refer_page_id=10009_1738125429741_05jgu2u9zq

I will run out an take a picture in a little. The balance wires are screwed on. You would run 2 series/2 parallel for 24v?

 

[dude47]

Sold out now

Try this

https://www.temu.com/goods.html?_bg_fs=1&goods_id=601099948707588&parent_order_sn=PO-211-12324013304873486&add_order=1&sku_id=17594033627202&_x_sessn_id=0dhaixymdb&refer_page_name=bgt_order_detail&refer_page_id=10045_1738125396344_fk0s8o0exq&refer_page_sn=10045

Lol you bought them out!

 

[robbob2112]

They still show in stock to me.

I intend to get 2 bms and make them separate 24v batteries and put them in parallel.... one thing I have learned from up in smoke is I want to see the cell voltage for each of them so they can be shutdown if any cell has an issue.

Looking at

JBD AP21S002 7S-21S for the bms, the 300amp version

 

[dude47]

Yea I have a spare JK BMS that I bought for another project. I really like the active balancing and being able to see cell voltages. I am still deciding if I want to go through the trouble of making a 16s 314ah battery. I would probably keep them in these cases and just connect them in series.

 

[dude47]

They still show in stock to me.

Shows in stock until I log into my temu account then says no longer in stock. I wonder if they put a cap on my account lol.

 

[robbob2112]

Alliance has JBD-AP21S002 300amps x 2 for $214 total... going to order them

 

[dude47]

Alliance has JBD-AP21S002 300amps x 2 for $214 total... going to order them

Nice, what do you think you are going to do for a case?

 

[robbob2112]

I will keep them in the original cases and just wire them together.

 

[yabert]

Nice! Thanks to share.
Look like awesome battery for the price.

 

[Vigo]

Nice!! I got mine for $299 and i feel pretty good about it now!

 

[robbob2112]

Just got 2 more for $244 each

https://www.temu.com/12v-300ah-lithium-lifepo4-battery-200a-bms-3840w-rechargeable-lithium-iron-phosphate-battery-15000-deep-cycles-for-solar--backup-power-rv-camping-g-601099948707588.html?_oak_mp_inf=EISeq%2Ben1ogBGhZnb29kc19iaGIxM21fcmVjb21tZW5kIMPOhK%2FLMg%3D%3D&top_gallery_url=https%3A%2F%2Fimg.kwcdn.com%2Fproduct%2Ffancy%2Ffe0f6746-08dd-45a6-a6e2-43c5edd17a31.jpg&spec_gallery_id=3525510385&detailDealsRecEnable=true&refer_page_sn=10032&refer_source=10016&freesia_scene=11&_oak_freesia_scene=11&_oak_rec_ext_1=MTEyNzg&_oak_gallery_order=937479239%2C1708825567%2C1095751724%2C1912390918%2C128200130&refer_page_el_sn=200444&_x_sessn_id=m3t48mvb3t&refer_page_name=goods&refer_page_id=10032_1738218080825_tr93s94262

Select the right size

 

[JerryK]

$282.90 prior to discounts, only four remaining.
OP glad they worked out for you, I personally avoid temu

 

[robbob2112]

I sure hope the ones I have ordered are like the tear down pics and 314ah inside


I intend to strip the BMS and case tops and make 24v batteries out of them

 

[bullet69proof]

I also got 4 of these , my 1st order was 2 batteries in one order and 2 batteries in another order to maximize coupons , I just did the same thing and ordered 4 more batteries , 30kwh for $1700

 

[yabert]

4 more batteries , 30kwh for $1700

Whaaaaaat? 57$/kWh
Awesome! Those prices are incredible.

 

[robbob2112]

STOP THAT!!!!

You made me look at the price and I ordered 2 more for $229ea

 

[Hungfish]

Alliance has JBD-AP21S002 300amps x 2 for $214 total... going to order them

@robbob2112
can you please send the link? thank you