Grade B Liar! A Perfect Example Of A Company Lying About Using Grade B Cells
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- Опубліковано 4 жов 2024
- In this short video, I'll show you a perfect example of a company lying about using Grade B cells in their lithium iron phosphate deep cycle batteries. The numbers don't lie, folks. #gradeb #lithiumbatteries #batterypowered
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As I have posted before, how do you know that the premium brand batteries are using Grade A cells? They might be Grade A, they might be only Grade B being sold for a Grade A price. At least with the cheap batteries you know what you are getting. A cheap battery sold at a premium price might have a 10-year warranty, and the few that fail before then I'm sure they would happily replace (pro-rated of course.) So you would get a partial refund on the original price to be applied to a new (cheap) battery at the current price.
Because you can get the cell testing data from the manufacturer (EVE, CATL, etc.) with the serial numbers. You can also call or email EVE and verify that information is genuine. All you would have to do is remove the lid of the case and read the serial numbers.
But that is just the thing, with the cheap batteries you don't know what you are getting. The marketing still says 4,000+ cycles and all of the same information.
You are also not understanding that Grade B cells may not perform anywhere near the same as a Grade A. You can find dozens of videos illustrating this but my favorite is this one from SFK: ua-cam.com/video/EEUhlNvsqjQ/v-deo.htmlsi=RLVcgW4dHS5UcAbe
The economics of selling Grade B batteries at Grade A prices just aren't feasible. Your failure rate within the first year would be 20%. That is verified data now that we have several years of these batteries out there. After one year your online reviews would be so bad that you would not be able to sell any more. The low dollar junk batteries don't have any brand recognition. They just pull them off the market and relist them under a different brand and keep going. You can't do that with Grade A. Grade A sales are 100% driven by reputation. No one is going to buy a $700 100Ah battery from a company they have never heard of. But tens of thousands of people do the opposite with cheapo $200 100Ah batteries.
@@LDSreliance Good information. My Elefast battery is Bluetooth enabled and has an app that lets me view the current voltage of each cell as well as the amp draw from the whole battery. Once I get my system set up, I'll test it under load to see how each cell is performing, just like in the video you referenced. If there is a problem, it's under warranty for 5 years, so I'll contact the seller if I notice any issues.
Sounds good. I hope they take care of you after the sale. Good luck!
I agree almost everything with you. But you say the standard of li battery warranty is 10 years. Victron offers 3 years, Exide 3 years , mastervolt 3 years. All battery for 1000 Euro for 100ah. All very reputable company. Form me, a warranty for 10 years in a battery, is a joke. Never Will be recognised. 10 years is a normal lifespan of a lithium battery with medium cycle use. Is impossible that your lifepo4 battery die after 10 years and is a manufacturing or material defect! Normal use. Most of lifepo4 battery have 2000 cycles at 80% dod. Is not 10 years if daily cycling.
Advertising 10 years warranty is a lie, the same as advertising 4000 or 5000 cycles at 80%dod in a 300 dollar battery.
Why the most expensive lithium advertising less cycles lifespan than cheap batteries? Victron 2000 cycles, Exide 20002 cycles, mastervolt 2000 cycles,
What would be the difference between A and B for lifespan and capacity and would 2 cheap batteries be better than one good one?
That is the topic of a video coming soon. But basically Grade B cells are not rated. They deviate from the original specifications of the cells and, when combined with numerous other cells in a finished battery, have unpredictable performance and length of life. All will have decreased performance and shorter life. The question is by how much and that cannot be answered accurately by anyone. So you could buy two cheap batteries and they could be a fantastic investment compared to one Grade A battery or you could have two dead batteries in 2 months. Or anything in between.
@@LDSreliance Dead in two months would be a clear flaw that can happen with any product. With third-price batteries you could just buy twice as many and still save money. If one goes bad, just throw it away and your battery bank is still way ahead. If I can buy twice the Ah capacity for 2/3 of the price, that seems like a reasonable deal, as long as it is not a critical application. Half the battery bank could fail and I'd still be ahead.
Thanks for the headsup on this. Makes me wonder how Redodo can now be selling their 100AH batteries on Amazon for $229.00.
I'll give you three guesses.
Rocksolar batteries are currently on sale for $577 for one (usually $986). You might want to pick one up.
Great info. Keep it coming.
Thanks! I appreciate the support.
Recently (as in over the last 2 weeks) I'm noticing a significant upsurge in $200 "shipped to door" 100AH LiFePO4 batteries targeted to replacing the lead acid ones in a car. Have you noticed this? What are your thoughts about them?
For cars, stay as far away as you can. You can and probably will fry your alternator. That is the short version of the story but it is more complicated than that. There is no such thing as a drop in replacement. Ever.
@@LDSreliance > There is no such thing as a drop in replacement. Ever
Would love to learn more! Is that because LiFePO4 batteries are lower impedance than lead acid and thus can sink more current than lead acid? Or do they float at the higher voltage than lead acid?
Maybe you should make a video about LiFePO4 batteries replacing lead acid in cars and their pros and cons - this trend is becoming pretty popular!
Yes, lithium has much lower resistance so it will take the full current from the alternator at all times. This causes multiple problems... the battery may not be able to handle that much current (most LFP batteries want 0.5C for their charging current) and the most automotive alternators do not have any active cooling capabilities so they will overheat. But that isn't all. If the BMS in the lithium battery ever trips for whatever reason and stops any incoming current, then the alternator will freewheel and overheat again since it has nowhere for the current it is producing to go.
Perhaps if they start making alternators with a clutch like the ac compressor so it can disengage itself if it has nowhere for the energy to go then that will make things more viable. There are companies that make devices (like Balmar) that can be wired in between a lithium battery and an alternator that will regulate the current to a lithium battery so the alternator doesn't overheat. But until those two issues are dealt with by auto manufacturers, you won't see LFP starting batteries in cars and trucks.
@@LDSreliance I think I follow but to summarize. Most lfp batteries are not specifically designed for being charged by an alternator and expects a bms. That BMS needs to take care of the charging current and provide a sink for the alternator even when charging is complete. This has nothing to do with the lfp itself or the grade of cells in it etc?
All LFP batteries have a BMS inside of them. It is not in charge of the charging process other than balancing the cells inside so they act as one. The alternator needs to be in charge of the charging. It needs to be capable of cooling itself and modulating the current it outputs. It cannot do either one right now.
Is there a brand you recommend? Which is best bang for your buck? I don't have a lot of money to spend right now on batteries but need to get some. Thank you for what you do.
I am not saying these brands are the best out there but these are ones that I have personal knowledge of that use genuine Grade A cells in their batteries: MillerTech, Sun Fun Kits, LiFeBlue, and Rubix. Other brands that I think have a good reputation and have good products but I can't 100% say for sure what their cell quality is: RELiON, Dakota, Ionic, and Monster Marine.
@@LDSreliance Cool thanks.
You are welcome! I sell MillerTech batteries on my site if you want to check those out: store.ldsreliance.com/
@@LDSreliance How do you know they are using Grade A cells? Because they said so, or do they give you the actual manufacturer tested specs for each cell?