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

[@LithiumSolar]

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.

[@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.

[@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.

[@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.

[@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.

[@jamesl9686]

Build your own. Grade A Prismatics are $79 per 100Ah. 4S active balancers are $11. Modular. Upgradable. Expandable. Replaceable. Reliable Pure Sine 3kW inverters are 400. New panels are 50 cents a watt. Gets less expensive every month. Til the tariffs kick in...

[@jasonpotts6490]

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

[@JunitafluxcyfatriciaJunita]

Mass production and overcapacity.

[@clarencewiles963]

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

[@realvanman1]

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

[@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

[@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.

[@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 ;)

[@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.

[@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 :)

[@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

[@2hotscottpro]

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

[@thefpvlife7785]

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

[@LawpickingLocksmith]

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

[@wrxs1781]

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

[@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

[@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.

[@firecloud77]

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

[@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

[@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.

[@tonysmith9061]

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

[@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 👍

[@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.

[@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

[@dustman96]

Battery finder is awesome, 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😊

[@BradCagle]

Nice!

[@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.

[@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?

[@DanielEarlester]

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

[@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

[@thinde88]

The good ol china doomfume

[@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 .

[@jasonbroom7147]

Imagine getting 6 years of service (2000 cycles) out of that battery before the capacity was down to "only" 80 amp-hours. Is it worth $99? All day long and twice on Sundays!

[@firecloud77]

<a href="#" class="seekto" data-time="544">9:04</a> Begs the question doesn't mean raises the question. Aristotle would have been impressed by this technology, however.

[@georgecarousos6735]

I think the most important lithium battery test you should perform is to figure out how these Chinese companies come up with these brand stupid names, lol.

[@LithiumSolar]

YES!!! So many of the cheap brands are just random letters, not even words. Maybe this one wasn't meant to be pronounced, don't know. Other guess would have been "dum-fu-me" kindof sounding like "dumb-of-me" but figured "dumb-fume" was a better start LOL.

[@2hotscottpro]

Hahaha 😊

[@viyusavery248]

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

[@isoufacker]

the white sticky thing must be superconductive silicon

[@farhanredza]

Careful with the pounding 😂

[@jussikankinen9409]

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

[@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.

[@rtsrts2317]

My wife dislikes my dumfume's in bed

[@firecloud77]

<a href="#" class="seekto" data-time="150">2:30</a> Excellent impersonation of Will Prowse. 🙂

[@LithiumSolar]

Are you new to this channel?

[@firecloud77]

@@LithiumSolar Relatively new. Why?

[@2hotscottpro]

There both good speakers with knowledge on subject of solar related topics!

[@AIJenkins]

Hopefully it’s not a Dumflame 🔥

[@davef5595]

Is the name pronounced “dumb fuh me?”😂

[@vashon100]

Prefer to not own something explosive with the letters DUM in it. LOL

[@mikeerstad3705]

$1.00 dollar per Amp Hour......Cheapest cost yet!

[@2hotscottpro]

Freakin Krazy low price!

[@AprezaRenaldy]

12v 100ah is $75 Now in China 🇨🇳 now. All these factories could go bankrupt 😂

[@2hotscottpro]

@ 29.95 free shipping lol

[@davidpatrick1813]

Tnx

[@jimmy_Ross]

not bad for a battery under 100.00 dollars told you all that these batteries will be under 100.00 dollars in a year from now i didnt expect it to be a month later but ill take that win lol told you all re re

[@foto4chrepek315]

2000 Cycles vs 6000 Cycles, hm..

[@ronduck2812]

Good i got one for that price

[@tfargher1]

Looks like thermo paste . Takes years for it to dry out

[@LisaPullman-d9h]

Awesome! Thank you for your hard work and talent! 🐱💞

[@goodcitizen4587]

Nice try, but I'll stick to the $950 12V/100Ah BattleBorn, thank you. LOL

[@2hotscottpro]

I have one lol