BATTERY TESTING GONE WRONG! Nermak 10Ah Test And Teardown

[@iceholepower8012]

All batteries that I recommend based on my reviews can be found below: www.iceholepower.com/lithium-batteries Here is the Amazon link for the battery bag amzn.to/3BuT87n Follow me on Facebook! facebook.com/iceholepower

[@h8GW]

I'd imagine this'll still be do well as a value-minded UPS battery upgrade, where it's always indoors at room temperature, where it's not moved around and have its insulation chafe, and where I don't plan on shoving a metal bar across the terminals.

[@diylithiumguy]

I have some killer NEC batteries I'm selling right now. Designed specifically for the purpose you mention. 12v 5Ah, brand new, $30 + shipping.

[@randydicotti3975]

I have 6 of these exact same batteries. I agree about the BMS used. Not only is there no short circuit protection, but at least half mine also have no discharge or overcharge protection. The cells seem pretty good but they skimp like crazy on the BMS board to keep the price down I would guess.

[@stevenkofoed1698]

Glad no one was injured during this short circuit test! I have built 3 power boxes for ice fishing and per your recommendation I have a 10 amp fuse in each one! My boys and I are all set for ice fishing. I also have each one set up with a Stryker 4 C, and we've been using them for summer fishing too! I decked two of the boxes one with 4 of single bright LEDs on one end and, 2 of the 6 LEDs strip lights. I followed your instructions from your how to video. That is a great video! The boys love the boxes too! Thanks so much!

[@MaureenMonahan-w1j]

And in regards to my prior post, explain how to correctly hook up the fuse and when to use it when using the Nermak LIFEPO4 battery. Thanks again.

[@richardssherman2146]

I bought 6 of these Nermak 12v10ah batteries the beginning of this year. The BMS has been replaced with much better ones (SWX-HSL-4S4P-V5)

[@lnelms2]

I had one of these and returned it after seeing your brute 10ah video.... Thank god.

[@iceholepower8012]

Good call!!

[@gtasandman]

lol i found some of these on facebook market for 10 bucks i was going to buy it but now im concerned. but i always ad a fuse to my wiring anyway.

[@SteveSiegelin]

Thank you, I was working on my friend's son's power wheel and I wanted to check the review on a lithium battery because I knew the dangers 👍

[@jec_ecart]

Awesome & thorough testing! Subscribed.

[@FrenchCheeto016]

Good looking out bud. Don't need anyone's stuff burning down.

[@beyondfossil]

Good video and thanks for showing the tear-down. I'm of the opinion of using an external fuse instead of an internal one. For me, a lithium battery without an internal fuse is not a deal breaker -- so long as this fact is stated in the battery's specifications. Because one can easily add a quality external fuse and have better control over it like amp cutout and speed. Versus an internal fuse that doesn't specify these parameters or is inconsistent between different builds of the same battery. Also an internal fuse can fail w/o any indication and is harder to trace. Cannot replace an internal fuse either if its a software fuse implemented by a microcontroller and MOSFETs. The more important BMS functions that absolutely must work are: (a) cell balancing speed & precision and (b) high voltage cutoff (HVC). Optionally there is LVC as well but I'd rather have better control over that with external control.

[@techno_john]

LOL, funny enough this video actually encouraged me to buy the Nermak! 😆 Because the BMS seemed to actually do what a BMS is SUPPOSED to do (charged the batteries correctly) and, as he said several times, the build quality is good! No idea why he didn't do full BMS functionality testing FIRST, and then the destructive fuse testing last. 🤔 Agree that an internal fuse is not all that important for higher voltage stuff... heck, always externally fuse electronics!

[@emralcrewrblox]

@@techno_johndid you buy this and did it work well for you?

[@amham48]

A good video/test would be a fire test of the lithium charging bag. Thanks

[@stevenkofoed1698]

Jeremy, could you please explain to us how to properly size a battery?

[@iceholepower8012]

Sounds like a good idea for a video!

[@NexGen-3D]

Looks like a good battery for the price if your after some cells, I'd buy these just tear open and grab the cells from it, I assume its a 4s 5p config. Id also say that is not really a BMS but more like an active balance board instead, to be a BMS it will need a logic controller, temp sensor and short protection.

[@ejonesss]

you should be ok with opening it up because lifepo4 has a very good safety record. the cells may smoke if they are damaged but never catch fire unlike the 4.2 volt lithium standard. that battery was very easy to open it should be like the 7 ah you tested where you had to use a dremel to cut it open i think lto maybe safer in that i have seen a puncture test and it did not smoke it looks like 18650 cells

[@pogilisyus]

So I have 6 of these Nermak 12v 10AH. Series of 3 total of 36v 10ah. Because i saw your previous video stating this battery passed your test. I'll put a 10amp fuse

[@iceholepower8012]

If you don't mind me asking, what do you use a 36v 10Ah bank of batteries for?

[@pogilisyus]

@@iceholepower8012 I bought these two 36v 750w 26inch front Hub Motor -Ebike made from china "Jaoupay Ebikes. So far it does what it's suppose to do, but again ive only had it for a month. We'll see how it goes and i'll update you

[@mowomedia4801]

@@pogilisyus How as these Nermak held up? I just need to power a 1 watt draw device for about 8-10 hours.

[@pogilisyus]

@@mowomedia4801 so far so good...except for the SPARKs when you recharge. I also charge them one at a time. ALSO i bought a fireproof bag and put them while i charge them.

[@hardyboysfishing]

@@pogilisyus are they still holding up? I'm considering buying one to run a depth finder

[@vinniec5286]

I realize that I am 5 months late to this video but I am wondering if after this test if you now use the inline 10amp fuse wire to short across the terminals during testing? Thank you for this video. I have watched a few of yours today and have liked and subscribed.

[@MrTBoneSF]

These are being sold as a replacements for sla batteries in APC and Cyberpower UPS. Would they actually be safe for that because one would assume the UPS itself would have a short-circuit protection?

[@james_mckey]

I've got two APC UPS that both use two LA SLA batteries in series. These batteries claim to work fine in series, and I have a pair, so I decided to test it. LiFePO4 cells have a nominal voltage of 3.2v and a max charge voltage of 3.6 to 3.65v depending on the manufacturer. In practicality, you can take them up to 3.7v without much worry, so they're fairly forgiving. Anyway, using the lower value of 3.6v, two of these Nermak batteries in series should have a maximum charge voltage of 28.8v. The output voltage of my UPS is 27.48v. So, in theory, this should be just fine. Using my desktop power supply, I charged each battery to 14.4v at 5A. After removing from the charger, their voltage settled at 13.65v which is the expected value. I let the batteries sit overnight, then I connected them in series and to my desktop power supply. I set the voltage to the value I read from my UPS: 27.48, and left the current set to 5A. After turning the supply on, it took only a couple of seconds for the voltage to settle at 27.48v and the current quickly dropped to around 50mA. Several minutes later the current was down to 2mA and a few minutes after that, current flow stopped completely. The end-charge voltage on each battery pack while the pair are held at 27.48v is 13.66v and 13.79v. This is not ideal. One of the traits of LiFePO4 (and other lithium chemistry) cells is that once they are charged, the electrons stop flowing. This means that in order to have lithium cells in series, you need a BMS to balance the cell voltages so that all cells get fully charged. In the case of a SLA drop-in replacement, this balancing has to happen at the nominal charge voltage of a lead acid battery, which is slightly under the nominal charge voltage of an LiFePO4. If this balancing can't happen, then each time the cells are used, they will get farther apart in their voltage levels. At some point, one will be overcharged while the other is undercharged and this is where you run into problems. The APC will see a total voltage of 27.48v and call it good, but one battery could be at 11v and the other at 16.5v -- with each individual cell at an average of 4.125v. This is very close to the break-down voltage of the electrolyte. Best-case when the electrolyte breaks down you get smoke and a brick. Worst case you get a thermal runaway fire. So, no, I would NOT use these batteries in an APC UPS unless it is a single-cell system.

[@ZachMeador]

the good thing at least with LFPs is you won't have nearly as bad of a thermal runaway with a short vs. other chemistries

[@montylowas4486]

Hi there, I have 6 of these battery's bought them within the last 6 months, I have had no problem using them in computer UPS systems, since this video have you had any updated information on these battery's and did you duplicate the results?

[@iceholepower8012]

We have not. We have recently transitioned out content to product spotlights.

[@ThaiNguyen-tb9zl]

Just found your channel and appreciate the info. All your recommended batteries seems to be from 1 company. Seems a bit bias or are you saying you've only found 1 company really worth your recommendation?

[@MaureenMonahan-w1j]

Could you send me a a link for the fuse I would need to prevent the short circuiting that occurred in your video that the internal BMS board was not able to prevent. Thanks

[@cdoublejj]

you ever try upgrading the BMS? i have some 100AH lifepo4s and i bought bluetooth BMSes

[@silentbravo]

You should probably start wearing leather gloves during short circuit protection in case you need to throw it out a window or something.

[@iceholepower8012]

Great idea, I have a pair of hot gloves that I will start wearing for that test. Thanks!

[@MaureenMonahan-w1j]

Could you recommend a fuse???

[@tintdr]

So unfortunately I just purchased a 36mah Nermak 12v for a old jumper pack. We will be using it to run a winch and jump dead battery,s . In this instance. What size fuse should we use? 40 amp? 35amp?

[@murphyzlaw13]

I've been watching videos and have just about everything to build my power box...except batteries...I bought the big zombie can, so was considering 2 batteries...but don't know yet. I will say, I'm impressed, you taught me something today. I had no idea that these batteries had a BMS inside, I thought you had to put in an external BMS. But I was gonna use lead acid..not sure now

[@iceholepower8012]

Lead acid do not have a BMS in them. Only lithiums because they are so much more energy dense. Thank you for watching!!

[@murphyzlaw13]

@@iceholepower8012 thanks for the response...lol, I did know that...I just didn't realize that the lipo, come with a BMS...thank you very much for your time

[@billligon4005]

I do have that battery using it in my friends EV scooter and so far so good after about a year of charging. I will buy that battery case, we take scooter on cruise ships and I want to transport a extra battery safely. My friends scooter take two in parallel for 10amp (I think). Thanks.

[@WiSeNhEiMeR-1369]

thanks COOP ...

[@cdoublejj]

lifepo4 can still go up in flame with a puncture too

[@terryjohnson3100]

The magic smoke was let out. Quick reaction time though.

[@hkmp5s]

That's why I buy extra smoke.

[@iceholepower8012]

Still has voltage so I guess there is still a bunch of magic smoke in there! lol

[@crowman5936]

Where did you get the blue battery tear down mat and parts holder? I looked at your tools I use but it's not there. Thanks

[@iceholepower8012]

I will load it up. Here is the link. amzn.to/3oGecjC

[@yakin_n_bassin8203]

Now that dakota lithium has a new contract w BASS I think its time to void the warranty on the 54ah

[@iceholepower8012]

If the channel grows enough to cover the cost of their battery, I will get one and test it out!

[@jjmcg9688]

I’m returning my Dakota lithium batteries but I’m not sure where to get the materials to package them. Any suggestions?

[@iceholepower8012]

fedex or ups will pack it for you

[@georgedolak8120]

Where do i get the work mat like yours? G.

[@iceholepower8012]

Thanks for watching!! All the tools in my videos can be found here. www.iceholepower.com/tools-and-supplies

[@WhatOnYouTube]

Can you charge lifepo batteries with lead acid battery charger?

[@iceholepower8012]

Lifepo4 batteries are a higher voltage battery. We do not suggest charging batteries with batteries. Please use the supplied battery charger for you Lifepo4 battery

[@WhatOnYouTube]

@@iceholepower8012 lifepo4 battery seller on Amazon typically don’t sell compatible chargers

[@iceholepower8012]

That is why we have stopped the battery review videos. We feel there are only a few companies that we would suggest to consumers.

[@LanceSheppard]

Ive got a BUNCH of these, they was all send to me for free. From 10Ah to 100Ah, do have any BMS upgrade suggestions?

[@jec_ecart]

@@LanceSheppard how are you so lucky?

[@LanceSheppard]

@jec_ecart I bought some and they had reach out and offered to send me some since I had bought them and I did reviews on them!

[@ericklein5097]

*3:55 Nothing is safer than LTO in the lithium set of chemistries

[@dirknieuwoudt4036]

If you understand how these BMS units function, you'll understand why it got damaged during this test ! Bottomline... The BMS WILL get damaged if you don't stick to system max ratings !!

[@gilbertos1984]

Good thing I waited on it

[@iceholepower8012]

good call!

[@MrWhiltetail]

Isn't it really dangerous to breath in smoke from Lithium?

[@miscbits6399]

Yes, but that was the support circuitry smoking, not the cells

[@jec_ecart]

6:24 uh. You could've salvaged the cells. Why throw them away?

[@iceholepower8012]

With the amount of time we have, it would be more work to keep them then get rid of them.

[@jec_ecart]

@@iceholepower8012 strange. Looks like a first world problem. You could've donated them.

[@LeopoldCyril-v5p]

Thomas Barbara Hernandez James Hernandez David

[@M0N0T0N0US]

The battery was still good bro 😂 it just got hot and burnt the paper

[@RFAdventures]

BmS means bare minimum standards on that battery

[@iceholepower8012]

HAHAHA Totally going to say that next time I find a turd of a battery!

[@dm55]

I never learn anything from your opening up of the battery.

[@LewisMabel-z7y]

Martinez Charles Garcia Susan Allen Michael

[@gilbertos1984]

No wonder it's 50 bucks half of other batteries

[@DonaldRichardson-j5e]

Martin Elizabeth Smith Kimberly Robinson Amy