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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!

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.

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?

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.

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.

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

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?

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

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

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.

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

Could you recommend a fuse???

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

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

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.

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

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

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.

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

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?

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

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

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

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)

lifepo4 can still go up in flame with a puncture too

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

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

Good thing I waited on it

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

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

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

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

BmS means bare minimum standards on that battery

No wonder it's 50 bucks half of other batteries

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

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 !!

Maybe you shouldn't push it beyond its limits so your opinion is crap