Dumfume Battery Teardown, $99.95 Black Friday Special, Good Deal or Bad?

[@LithiumSolar]

Do you want to see more cheap budget battery teardowns? If yes, any brands or models in particular? Please let me know! Dumfume Battery... amzn.to/4gtrybJ Battery Finder... batteryfinder.net/ (affiliate links)

[@mannyfragoza9652]

Dum FU Me hahahahahahaha BTW that is the Mini the reg size is 149.00

[@RANDOMNATION907]

Forgive my ignorance but , why is the low temperature protection feature so important ?

[@robertthompson5084]

@@RANDOMNATION907 if you try to charge below freezing you will do permanent damage.

[@RANDOMNATION907]

@@robertthompson5084 . . Oh, I didn't know that. Thank you.

[@FewerOptions-mx7qt]

Maybe the white stuff is thremal paste

[@WillProwse]

Who knew this day would come! That's just crazy! So cheap

[@LithiumSolar]

Yeah but that cycle count has me wondering...! Still a good battery for the price.

[@billykulim5202]

The world is running out of registered name. So they chose dump name for their product

[@thefpvlife7785]

You did will. Your breakdowns caused competition which drove prices down.

[@muhammedalzadjali2524]

But not cheap enough for South Asian and African countries where people need batteries because the grids are not reliable there.

[@HR-rt9nh]

1994 DX66 cpu $500 $100 for 1 meg memory

[@KuntalGhosh]

I am an importer and pack assembler here in India. Raw cell prices have dropped hard in recent months. Some makers have reduced price by upto 70%. But those making battery packs haven't reduced prices that much and so pocketing in huge profits. Cbak 15ah cells are less than a $ in bulk. 4-5months ago they were 3$ ea. So 100$ for 12v 100ah should be the normal price and anyone selling these for 300-400 is making huge huge profits.

[@naroddyzmow5356]

Hi Kuntal Where people can buy good quality raw cells with new low price?

[@kev4241]

that matches with the large cost reduction predicted for this year, which honestly is late arriving at retail. going forward looks like a maze of tariffs so now maybe the time

[@Jorcheal81]

@KuntalGhosh Hi Kuntal, I'd also like to know where to buy cells directly from the manufacturer. Are you allowed to disclose this?

[@veganpotterthevegan]

@@KuntalGhosh they're not going to decrease their labor prices 70%. That would be a terrible thing if they did. Their rent also isn't dropping 70%

[@veganpotterthevegan]

@@Jorcheal81 Aliexpress has stores selling largely direct. I wouldn't nitpick about a 5% markup for Aliexpress fees.

[@mikemalone9678]

Thermal paste has superior thermal performance to the mica which is used when there needs to be electrical isolation between the device and its heatsink. Thermal paste should not dry out. As an example, it is used between the CPU and its heatsink in a PC.

[@James-Vining-333]

Yep I was just going to mention this as I bought a Tube of Type Z9 Heatsink compound to use on my Amplifiers it is white just like that and if it is dried out it is no longer functioning properly.

[@verticalaccessprofessional4656]

Thank you for doing this. I also got a pair, they arrived 2 days ago. The packaging was deliberate and neat. I also appreciated the instruction manual. It took a very consistent 55 ah each to charge fully. So far so good. We will see how it goes.

[@jacksonblack9408]

This was very well done.. If only every product review on youtube was like this

[@alpinerep]

Shenzhen SaiHang makes this 100A BMS. TimeUSB also uses this manufacturer as private label. They also produce 16S ESS BMS models between 100A-200A with on-board BT, active balancer, comms board and attached LCD screen. Seems to be built pretty solid for a no-name BMS.

[@user-dw9ou9sg2p]

I was in Thailand and this guys tuktuk was running on a pack of DumePhuck (doom puck) batteries, so i guess Dumfume isn't so bad...

[@markrainford1219]

😂😂

[@canyondan]

I bought one when you highlighted it with your battery finder program which is awesome. It has worked well for me so far. Thanks

[@jasonpotts6490]

Including cold-temp cutoff that actually works? What a bargain!

[@JunitafluxcyfatriciaJunita]

Mass production and overcapacity.

[@markmonroe7330]

Excellent presentation. Thank you. Great content and thanks for the battery finder link Really amazing how prices and quality of these batteries are playing out.

[@Jasonoid]

That battery finder tool is awesome! Thanks for sharing (someone is getting killer affiliate sales with that website I'm sure)

[@ahaveland]

If they sealed the battery before the solvent in the thermal paste had fully evaporated, then the air inside would be saturated with solvent, which would explain the smell, and it wouldn't dry for a very long time. However, even if still tacky, the paste should still work as long as they're not using it as a glue.

[@LithiumSolar]

Interesting - makes sense! It definitely was not the battery that smelled, has to have been the glue but I wasn't going to sniff it that closely and find out. Don't know what chemicals are in it but it's strong-smelling for sure!

[@kkarllwt]

Silicon heat sink compound smells of acetic acid. Just like silicon caulk It may never 'dry out'

[@dustman96]

Good observation

[@2hotscottpro]

I have 2 year old ridged pack out boxes that still smell like harbor freight.

[@barnowl6807]

@@kkarllwt If it does then it is guaranteed to corrode any copper and even aluminum material in the battery. Electronic grade silicon should be used, and it smells more like very mild "Vicks Vapor rub".

[@jbranche8024]

Definitely agree they were hoping you guys would post a bunch of videos and reviews and it would accelerate the sales. Build the brand

[@clarencewiles963]

And yes your new work station is looking great. Thumbs up 👍

[@2hotscottpro]

Wow so many brands now ! First I’ve seen the battery finder,,,,NICE!!!😊

[@realvanman1]

“This stinks inside”…. Well…. “DumFume” 🤣

[@markrainford1219]

200A version is called Badpong.

[@huckbeduck]

A can of beans will give me dum fumes.

[@LawpickingLocksmith]

Thank you so much for not playing idiotic music or bore us with stupid unboxing.

[@dinkc64]

Straight to the point review, I have a lot of respect for this reviewer!

[@tonysmith9061]

Awesome video, but I think you should have also done a 100 amp discharge test given that the thermal paste is in question.

[@rgbii2]

Thanks for the teardown and review. Also suprised it did over 100ah, which is good to know since I also bought one while on sale :)

[@1millionstartups]

Thank you, got 2 but have not tried. Two fits perfectly in a Dewalt TSTAK tool box or mobile box, and will hook them up to Delta Max to x2 KWH to backup kitchen/internet/lights.

[@dustman96]

Unfortunate battery name. Maybe they named it after experimenting with that adhesive. Crazy how cheap they are getting. I knew it was going to happen, but didn't expect prices to drop so fast.

[@alanworks4354]

I believe that white paste is an electrical insulator similar to Liquid Tape. DuPont makes a product called Molykote 4, which does the same thing

[@alpinerep]

I bought two on the BF sale and they both tested similarly to yours. Nice to find a budget battery at this price that actually meets it's capacity claims, decent build quality AND has low temp protection.

[@JunitafluxcyfatriciaJunita]

How can companies in China operate without making profits?

[@2hotscottpro]

There 15ah only tested 12.36ah on Amazon review.

[@alpinerep]

​@@JunitafluxcyfatriciaJunita They still make a profit, for sure. Part of the reason why they can sell cheaper than US companies is that products purchased from overseas companies selling on marketplace platforms are duty free. The current US de minimus rules allow consumers to import many products from overseas companies valued under $600 directly to US consumers for personal use, legally skirting duties and tariffs. This will change soon with new de minimus rules recently announced to be implemented in 2025.

[@alpinerep]

@@2hotscottpro curious what the test procedure was. Glad the 100Ah are performing better.

[@2hotscottpro]

@@alpinerep actually I was looking at a different brand 15ah.Yes 104ah is 👍

[@LambySRI]

That looks like a pretty good build to me. I'd be happy spending my money on this.

[@milvolts1]

Hello, after watching your great illustration video I purchased one my self. I did a capacity test with battery at 13.3v. To my surprise it only gave me 22ahs. I've also noticed that when I recharged the battery the time it took to charge was only 2hrs to 13.3 volts.

[@jab376]

Something is not right. Discharge it all the way down and try recharging it back up again. If you get the same results then you may have gotten a defective product.

[@milvolts1]

@jab376 I did just that and picked up 2 more on Temu. They were even cheaper. Did full discharge/charge. Then capacity tested them and got just under 104ahs on all three. These batteries are great 👍🏼. Thanks

[@thefpvlife7785]

I picked up a Deason 12v 100ah group 24 for $119 and I am very impressed by it's quality & performance.

[@tommkc]

thats a deason price.

[@thefpvlife7785]

@@tommkc Bahahahaha .. good one

[@sonnmorangello6837]

I bought two of them they are doing great actually put them in series with two other brands of batteries and they seem to do well in a 48 volt bank I have a victron shunt on them and have completed 4 discharges and recharges down to 40 percent pulling 600 watts from the bank continuously so I am very pleased planning on getting two more asap after watching this video I agree I don't think they will do 6000 cycles at 20% but they might at 40% thanks for the great video and try getting a affiliate link so you can make $ for doing this thanks again and keep up the great work

[@BrilliantDesignOnline]

Just looks like a super quality battery; very impressed. Good review. These foreign guys REALLY need some marketing help on naming their products. But well played, like you said, 'advertising' by getting the product out there possibly at a loss of profit; based on your review, I will definitely get this.

[@UmbreWolf]

That white stuff where the teno sensor is us thermal compound, its supposed to be wet/semi wet. Same stuff they use on transitors to heatsink them.

[@LithiumSolar]

If it is thermal compound, I'm not sure why they would have put it on the main terminal bolts or the balance lead connetor.

[@ScottDLR]

Super nice batteries and another great review on your part, Will. White stuff is thermal paste (not mastic) and it's not supposed to dry. It will stay soft forever - as it should. The newer stuff isn't as gooey as the old stuff was.

[@LithiumSolar]

If it's thermal paste, then why did they put thermal paste on the BMS connector and the battery bolts?

[@dustman96]

Battery finder is awesome, thank you!!!

[@JohnThomas-ou2rn]

Great idea to review the first real cheapo, sub-hundred dollar battery. Clever marketing too.

[@bryanmania888]

thanks for posting this kinds of teardown review :) would also be lovely if you could review the WattCycle 300AH Mini :) looks llike a killer battery because of its small form factor, thank you very much and thanks in advance ;)

[@johnyoung5854]

The battery finder is great! Would it be possible to add a 6v option? Very interesting video.

[@pounch21]

For $99.95 that battery is a win. 🎉 I would buy this over the pouch cell minis. However how they will holdup over many cycles and time is anyone's guess. I would suggest giving that brand some time, say a year and buy another battery and see if the quality improves or degrades.

[@jussikankinen9409]

10years but 5 is good

[@2hotscottpro]

For 160 bucks there’s bats with 10 year warranty.

[@mediocreman2]

Yeah, this battery is now 140, so it doesn't make sense to get one without a warranty.

[@Jasonoid]

@@2hotscottpro but a 10yr warranty from a no-name brand is questionable right? I doubt they will even be around for 3 years.

[@philliplopez8745]

Most likely titanium dioxide heat tranfer paste , and it takes a long time for it to powder .

[@TheAussieRepairGuy]

3:20 - that's heatsink compound, it's meant to be goey - it's silicone based.

[@LithiumSolar]

Ok, so the next question is why did they put heatsink compound on the terminals and BMS connectors?

[@TheAussieRepairGuy]

@LithiumSolar it's a cheap way to keep corrosion off. Other option, it's dilectric grease, but thats usually black. If it goes hard after you leave it out for a while, possibility its neutral cure silicone, and been sealed air tight and just never cured.

[@rexscates]

This yes

[@tjsmith3060]

The one test very few so is a max surge current discharge test. I would love to see what this battery can do.

[@jandst.6634]

Interesting that the OVP is set at 14.6 which is 3.65 volts per cell. Most mfg have a higher OVP. The nice thing is this test battery did not go into OVP and provided 104ah! Why didn't the reviewer do a high amp discharge to test the BMS 100amp spec? Nice review. Thanks.

[@edm7356]

I love these teardown videos. I am hoping for someone to do a teardown of a Kepworth 300ah battery. They are on Amazon for $499.99 with a $100 coupon for a final price of $399.99. It looks a lot like the Watt Cycle 300ah battery. If built well, I would give it a try. Thanks for these videos.

[@s.mendez7160]

your better off investing in a 48V battery. Less copper, and far more wattage.

[@edm7356]

@@s.mendez7160 I agree with all that, but I would be replacing an existing 12V battery and the investment in copper and equipment has already been made. This is in a van.

[@WayneTheBoatGuy]

nice - that was a good deal

[@firecloud77]

Seems the form factor would be quite a bit smaller without all that foam.

[@lindenhoch8396]

Would a battery like this work as a car battery? It seems to have lots of power, but perhaps too fragile?

[@LithiumSolar]

This battery is not designed for engine starting. The BMS is not capable of the current requirements.

[@boardnski156]

I thought $200 for an Ecoflow 100 Ah battery was okay. Considering that one is incredibly well built, it seemed worth it for a tongue mounted camper battery. And the idea of anything below $150 being too good to be true. Happy to learn these "cheap" LiFe batteries are okay depending on the application.

[@ranig2848]

Do you have a spreadsheet (Google/otherwise) with all the batteries and equipment you tested with some rankings (or just pass/fail)?

[@LithiumSolar]

No, not at this time. I've thought about it but it's difficult to keep up with designs that change over time (manufacturer starts using different components in the same battery).

[@catranger01]

Could that "wet glue stuff" on the temperature sensor be thermal paste?

[@LithiumSolar]

That is a plausible theory; however, it was also on the balance lead connectors and the terminal screws. I think it's uncured silicon of some sort as others have pointed out.

[@evil17]

@@LithiumSolarI am sure it was thermal paste on both the sensor & the mosfets, possibly a cheaper version but meant to be a thermal conductor regardless.

[@autohosh72]

Great review. Thanks

[@JJ21lives4ever]

White stuff with the thermal sensor is thermal paste or thermal putty to be more specific

[@sjgavenger37]

Temu sells that brand also

[@jasonpotts6490]

could that gooey white paste be something like a thermal grease? Doesn't seem like it would be beneficial, really, so doubtful. EDIT: I see later in the video there was what looked like the same paste on the heatsink etc.

[@LithiumSolar]

I don't think so, it's semi-hardened and it's on other things like terminal bolts and the balance lead connector. It almost seems like some kind of 2-part formula that wasn't mixed right.

[@2hotscottpro]

See if it cures with air over time?

[@veronicathecow]

Excellent video, thank you.

[@robert4027]

cool and I thought I scored when I bought a Seikon 12 100 ah battery for 151 dollars on black Friday

[@2hotscottpro]

You did lol😊

[@robert4027]

​@@2hotscottpro👍

[@chasmarischen4459]

Good video.

[@msromike123]

I have that wet glue stuff in my rc transmitter on the anteena f connector, it is not cured, my guess is it is for vibration damping.

[@KentBrase]

The white stuff on the transistors and heatsink is probably some thermal paste. I bought a tube of white thermal paste way back around 1990 that had that consistency and took several years exposed to air to get thicker.

[@johncarlocruz8085]

Does anyone knows the warranty of these batteries?

[@LithiumSolar]

I would assume no warranty as with most of these random companies...

[@TheCornucopiaProject-bd5jk]

We can equate cycle life with price. As you say, cell cycle life is 2000 @ $99 This equals cell cycle life of 3000 @ $150 So are they cheaper ? Not really. And if we compare quality of components and features it very quickly falls behind in value. However, the fact that you can build 10kwh battery bank at 24v for $800 is insane, or 20kwh at 48v for $1600. Would I trust my critical loads to a. Usher setup? Perhaps not. But as long as they work, it’s a lot of energy storage for very little money. Like buy a EF Delta pro 3 and connect this to the solar input to increase your capacity. Have you ever used two large battery banks at 48v and then use a combiner box to feed into a solar generator? O.S. It’s now $136

[@WeeToddDidd]

In the middle of the video you stated 2000 charge cycles and the documentation showed that as well. At the end you said 6000 charge cycles?

[@LithiumSolar]

The manual states 6000 cycles at a 80% depth of discharge. The datasheet I found that is very similar, but not the same exact cell, suggests 2000 cycles. I don't think you will see 6000 cycles, but could not find the exact datasheet to cite.

[@WeeToddDidd]

@@LithiumSolar Gotya, 2k sounds more realistic. 6k? no way.

[@2hotscottpro]

There 300ah is $253 now at Temu.

[@wrxs1781]

Considering what I paid for two batteries a year ago, this is an attractive deal.

[@AprezaRenaldy]

Try to Guess how much this battery is sold for by the factory.

[@wrxs1781]

@@AprezaRenaldy Thanks for the reply, I am not sure of the factory cost, but with the incoming administration and the talk of tariffs, they need to push out as much product as possible, at discount prices..

[@winstoncleghorn470]

Can i get one..buy one..let me know ... or two... Thank you.

[@wjp255]

Looked at that battery on Amazon. $144.

[@LithiumSolar]

Yep, this was a Black Friday deal that has come and gone unfortunately. I haven't seen anything below $100 since Black Friday - not even on Cyber Monday.

[@webtomboffgrid9725]

I got two had a 60 dollar coupon so two for 140. i also have a new wattcycle mini 12 volts can i use them both together?

[@ovalwingnut]

Thanks for "taking one for the team" It's 𝑰𝑵𝑽𝑨𝑳𝑼🄰𝑩𝑳𝑬 to be able to peer behind OZ's curtain! That 'brand name'? I'm left dumb founded and fuming over that choice (dad joke!). Your Xpertise (formally Twitter™) is also 𝗜𝗻𝘃𝗮𝗹𝘂🄰𝗯𝗹𝗲. Thank you for the video. Cheers from So.Ca.USA 3rd house on the left.

[@charleshines2142]

That white stuff may be some sort of dielectric grease (does not conduct electricity)

[@thatyoutubeguy7583]

Bro lead acid 100 amp hour is 170 bucks. It crazy how lithium is now CHEAPER than lead

[@2hotscottpro]

My Interstate 90ah agm was 200 bucks each in 2022.Yes indeed Krazy times.

[@AprezaRenaldy]

It's even cheaper if you assemble it yourself. DIY. And the prices in China are even cheaper .

[@Gary-ee3kq]

When I go to LA I'm going to pick them up straight from the warehouse for $80.

[@LithiumSolar]

Where do you see them for that price w/ local pickup?

[@Gary-ee3kq]

@LithiumSolar 😅 not everything is listed. Shipping to your house wasn't free.

[@LithiumSolar]

@@Gary-ee3kq What? I am asking where you see them for sale at $80 with local pickup as an option. I am aware there is a cost involved in shipping them to my house.

[@Gary-ee3kq]

@LithiumSolar not listed. I'm going to make them an offer for 8. After Amazon/ Ebay fees are removed that's what they are selling these at.

[@2hotscottpro]

Oh Snap! lol

[@Gw0wvl]

The white ' Glue stuff ' you refer to looks like thermal compound , You can see the Black silicone type adhesive that holds down the sensor and the thermal compound to allow heat transfer ....... I'm surprised you don't know this , Especially when you are doing a review .

[@s.mendez7160]

Don't be a smartass. Lucky to have him take the time to do these reviews. Lets see you do better?

[@jnucci1]

So is this the mini? I see they have another 100 ah battery that is not "mini", it looks larger than the mini and is $50 more.

[@LithiumSolar]

Yes, this is the mini version (Group 24).

[@viyusavery248]

mxlegnt 12v 100ah is also $99 can you tes it too?

[@andrievbastichy8551]

finally.. i have mine it came last night. om a scaredy puss and im waiting for the inverter to arrive - so i just read the manual and put it back up lol

[@jbehitech]

I paid $400 Au and need to replace BMS to be able to use. Can I get this in Australia?

[@LithiumSolar]

The battery is not serviceable. The case is glued together. I would check with the manufacturer or place of purchase if your battery is not working correctly.

[@mstexas]

I got to say I really laughed when you open that battery up and said wow this battery stinks! That was funny in itself but what I realized that the name of the battery was dumb fume Dumfume. ROFL! Now you know how it got it's Chinese name.

[@LithiumSolar]

LOL fits the name I suppose. Most of them have a slight odor but this one really STUNK. I think it was the glue that was used and they didn't allow it to dry before sealing the case (as someone else pointed out).

[@florihae]

Oh if I could only get a few of those for 100$ 😍

[@axscdvfb]

Automatically generated brand names have finally reached its climax.

[@LithiumSolar]

Is that why so many sound silly or are just random letters? Some sort of auto-generation that looks at unused letter combinations? Ha!

[@axscdvfb]

@ my guess is that someone did an analysis of these throw away brands that just want to make a quick buck. Among Chinese sounding names, western sounding names and random names, they must have found that random names generate the most profit. Anyway that’s just my guess.

[@jjames5475]

Can you do a BATTERY TEAR DOWN ON A " DR . PREPARE 12 VOLT LIPO 4 BATTERY . And Your Opinion Please .. Thank You 👍

[@jeffwatts2727]

Is there a version capable of drop in replacement for small car with enough CCA?

[@LithiumSolar]

I have a video covering why I feel that is a bad idea.

[@s.mendez7160]

These batteries couldn't handle the continuous high heat under the hood of the car, and if the BMS suddenly disconnected, your alternator would be ruined... The Alternator needs to see a load.

[@neiliewheeliebin]

Don't do it it's not worth the hassles, lead acid will easily outlast this thing x3

[@markb1911]

@@neiliewheeliebin *When used in the application of being a primary starting battery for a ICE vehicle, yes, it would outlast a lifepo4 similar to the one in this video, but mainly because most vehicles currently sold do not have electrical systems designed for this battery chemistry. There are a few luxury vehicle brands that do have electrical systems designed for primary battery consisting of a 4s lifepo4 high C/rate battery. And in those vehicles, they outlast lead-acid by many times the normal life of a lead acid primary vehicle starting battery.

[@LygerTheCLaw]

i'll keep waiting until under $100 is the norm. the total cycles is the most important spec, and one that takes time to verify. if these die in a year, they're overpriced even at $99.

[@MECANICANN]

Great review, thak you.

[@DonnyHooterHoot]

The battery now claims 15,000 cycles in the Amazon blurb.

[@BradCagle]

Nice!

[@jimlynch9390]

Very interesting. Thanks.

[@gkedl100]

Nevermind quality of the cells. At some point these will no longer work once the internal electronics go bad.

[@JoseAlba87]

Could be K5 thermal paste

[@LithiumSolar]

Makes perfect sense for the temperature sensor but no idea why they would put it on battery terminals or BMS connectors.

[@JamesMiller-e8y]

Could that be lithium grease that's what it looks like

[@isoufacker]

the white sticky thing must be superconductive silicon

[@malrofo]

Wonder how this will work in my car

[@Icecold0505]

No other name in the industry says quality like ‘Dumfume’. 😂

[@eugeneputin1858]

Anybody know what it costs for an ev manufacturer per kwh these days? This is crazy cheap

[@djkillachris]

How about a real tear down and test. What are the individual cell voltages? How about under load? Checking for drift under load and charge would be more useful information than anything else. Then Separating the cells and checking the individual internal resistance would give an idea of what grade the cells are. Certainly not grade a for the price. If the pack is unbalanced it will not last. This looks to be more of a paid commercial than an actual test/review.

[@LithiumSolar]

How about you buy one and check the aforementioned items then get back to us with a link to your video?

[@robbrouse5867]

The white stuff looks like thermo grease and stays soft.

[@LithiumSolar]

Makes perfect sense for the temperature sensor but no idea why they would put it on battery terminals or BMS connectors.

[@fgbhrl4907]

Not quite the 4000-15,000 cycles advertised...

[@mark2220]

It's 100 bucks lol. Buy another in 5 years and still be better off

[@offgridwanabe]

Great price time will tell if it will last nearly 1/2 price for a similar AH when series into 48 volts Thanks again for all your testing.

[@LithiumSolar]

I think it will be the lower cycle life that gets you here. I need to try and obtain a datasheet for this exact cell so I can prove one way or the other. Great Power have been notoriously low-budget cells with a reduced cycle count.

[@thinde88]

The good ol china doomfume

[@jussikankinen9409]

Lifepo4 last 10 years, agm is best choice here cause 100ah lifepo4 cost 500e

[@haldyer3145]

Where “here” is?

[@nathanfisher6925]

2000 cycles is the only downside, good deal.

[@DanielEarlester]

If it doesn't work you will never be dunfuming.

[@davidpatrick1813]

Tnx

[@danieldougan8550]

With all the respect you said the battery had two thousand cycles to eighty percent and then you changed up ? And said six thousand cycles

[@LithiumSolar]

Sorry if that was confusing. The manufacturer makes the following claims: 6000 cycles at 80% DOD (manual), 4000 cycles at 100% DOD (Amazon listing), and 15,000 cycles 60% DOD (Amazon listing). I am stating my opinion that I believe the cells to be good for 2000 cycles at 100% DOD based on experience and similar model datasheets.