NewStats: 3,265,026 , 8,185,360 topics. Date: Friday, 13 June 2025 at 07:56 AM 3h185s

BigDickProblems:
Some versions of Li-ion batteries now have a USB C port
Source: https://x.com/mkbhd/status/1929608426268598692?s=46

I've had these for 2 years, but micro usb version. Very nice invention.

They're very cheap too. Has an inbuilt charge indicator. You can get them from your normal average electrical stores.

HeavenlyBang:


Tested on lowest speed. Lasted 11h3m. Voltage when it shut off was 9.7v.

LVD of 9.7v
HVD of 12.3v

Within spec for Li-ion, I believe. Experiment looks like a success. If this gives me 18 months of use, I'm a happy man.

Hold up, how did you do 11h on lowest speed? I was only able to manage 5h30 minutes on lowest speed.

HeavenlyBang:


Never mind, I foolishly ran the test with the fan still connected to AC.

Battery is actually at 12.3v, which is perfectly fine for li-ion. Looks like the fan knows exactly when to cut off charging.

You should be apple to parallel them quite easily.

Great. I always wondered if battery was overcharged as I don't have multimeter. Thank God for your test I now have peace of mind knowing it doesn't overcharge.

The only crude test I did was to check for increased temperature in either battery or wire.

HeavenlyBang:
I bought the li-ion battery pack on Jumia as a replacement for the lead acid in my rechargeable fan btw.

Battery came in at 11.6v, which should be about 65% SoC in a 3S 18650 setup. Pins don't match so I just ripped off the pin on the battery and connected directed to the fan's pins. Works fine.

Discharge/charge behavior remains to be seen. And that's what concerns me most. After all, lead acid is effectively at 0% SoC at 11.5v while a 3S li-ion is still at like 50% at that voltage. Hopefully the fan's LVD doesn't Bleep me over. Will update.

Got same. Mine is performing just great. I wonder if it's possible to get 2 for a parallel connection in order to increase run time.

HeavenlyBang:


Ok.

Chief. Update on the li-ion battery for rechargeable fan.

The battery arrived, 11.1v, connected directly and charging with normal AC charger. Everything is working fine and the speed is very Ok at speed 1. Lasts about 5hrs:30 minutes. The charging indicator works fine and when battery is full it stops charging and shows green.

I doubt this can work for you as yours is 15v by default right? Mine is 12v.

Mrreed:
The only con, they should have substituted that for a smart BMS.

Can the bms be swapped for a smart one? Is it possible?

fuckboys:
it's close to 3 weeks now of active usage and I've never drained the battery no matter how hard I try.

A Fridge and a 43" smart TV with 2 ceiling fans all night has refused to drain the battery. It's very good.

Wow, this is really impressive.

fuckboys:
i never really charge with nepa or gen, I just have it installed in just for the convenience of it.

How's your battery performing Chief?

KudozInteriors:


I intend adding extra 3 or 4 550watts s after this whole brouhaha has ended.

I heard that they don’t allow police or army to arrest anyone in Alaba. I don’t know how true that is. Nevertheless, I’ll get him arrested if he doesn’t cooperate.

Good, before adding more s try and ask questions and also update the house with your kind of inverter, capacity and charge controller if possible, so they can better advice on how to size your system properly.

There's oversizing and also undersizing.

KudozInteriors:
The installer lives close to me. He travelled and came back two days ago. He came to my house yesterday and I told him that I bought a shunt to test the battery capacity. I’d already asked the Sako distributor at Alaba if the battery he gave to me was 25.6v; 200ah and he was beating about the bush but later answered me that that was the battery given to me.

The installer called me back few minutes after leaving my house and told me that the distributor called him and told him that one of my friends at Alaba who happens to be a PRO there and works in their task force caused the whole issue. I ed that my friend when they first sent me one battery called Suhkig and I rejected it. So I called him to help me go and make sure those distributors give my installer a good and renowned product. They said the PRO came and met them ahead of time and discussed with them on how to make money from me. They said he told them that I’m like a brother to him and that anything he tells me in Alaba market, I’ll do it. They said they had to record the conversation as they were scared it might backfire. I sent their balance to this PRO so that once he confirms everything , he will transfer to them. So they gave me a bad battery because according to them, he didn’t give them the complete money. This PRO at Alaba has been like a brother to me for the past 5 years. I bought almost all my appliances through him and he has never sent a bad product to me before. I just call him and he meets the direct importers and tells me the price of any commodity I wanna buy and it’s always cheaper than normal market price. I in return bless him financially and with airtime severally.
I even bought my inverter freezer through him last week.

So, they said that if he can return the money he withheld, they will give me my complete 5Kwh battery. I’ve just been in shock since.

Bravo! na to use Police or Soldier go pick up both the PRO, the installer and everybody involved and get your 5kwh battery. I think it was a sticker fraud.

Meanwhile what I noticed from your 2.5kwh battery is that it hardly gets charged to 100% in a day (From ur previous SOCs posted), I doubt if your current set up can even charge a 5kwh to 100% in day.

mobilemykel:

Dude I said Gen 2 not Gen 3

Gen 2 is available on Jumia at 590k too. Check it out.

mobilemykel:

I want the Gen 2 with residential plan. Any idea how it can be gotten ?

It's available on Konga website. Gen 3 at 590k and you can activate the residential plan. Or you order from starlink website.

Mavor:
I am looking for a 48V and I have not seen a 15kwh for that price or close. I will gladly go for that, from a solid OEM of course. I dont want anything 24V.

He just mentioned LVTOPSON and told you the price he got it.

There is Deriy, there is Valto, Firman, Felicity, Sako, Cworth. It's plenty. They all have 48v batteries at a fair price range.

Valto even offers 7.5kwh for 1.250m, 1.9m for 5kwh is just ridiculous.

Deriy also have 5kwh 48v for 1.050m. If you do some research you will see, it's not hidden.

Mavor:
I'm thinking they cost that much because they are higher voltage rated and LiFePo4. I am strongly leaning higher voltage cos they require lower current to operate which means less heat and no fans needed so no battery noise. Your LVTOPSUN is 24V abi?

Follow his advice, they're stupidly overrated, they're quoting x2+ of average 5kwh battery price whether 24 or 48v.

That amount they're offering for 5kwh can get you close to a 15kwh battery, read up the thread and you will learn a lot.

KudozInteriors:


This is the label on the battery.
It’s says 5120wh

Guys notice that the warranty seal also seems broken.

KudozInteriors:


Okay. Thank you so much.
I will do exactly so

Boss calm down, your battery is 2.5kwh..No need to buy anything else. Go check ur manual first.

AndroBlaze:


Good spot. Though I did not think their smaller batteries come in this build.

Please KudozInteriors confirm to us all what your installer said before buying the battery and the price you bought it for.

Please as much info as possible so we can be sure who the culprit is.

It does. I think it's one of their latest additions. I have been looking at it but it's quite expensive sha.

HeavenlyBang:


Umm, don't these numbers mean this is a 2.5kwh battery?

This looks like a 100ah 24v battery?

Yes, that particular battery is 2.5kwh.

Drgreatone:

His problem was from using more s than specified for the battery voltage.
Even if you want to go above the limit, dont over do it cos u wud end up likely having issues

@fuckboys follow his recommendations and try to check specified maximum pv array for ur system from the cc manual. I think here lies the solution to ur problems before things start getting fried

fuckboys:
someone is saying my s are too much for 12v. Is that even possible?

Yes it is possible. Follow the charge controller manual, there is a limit for 12, 24 and 48v. That way you know how best to connect your s.

fuckboys:
no my battery didn't even charge at all today with all the sunlight.

I had about 700plus watts around 11am then it kept increasing and crossed 800w before the c. Disconnects and won't charge again.

Please who has experienced this.?

Sorry about that Chief. Try quote the experts to call their attention to it. If possible, post pics of ur set up too if there are any errors I am sure they can help u resolve it.

fuckboys:
please the charge controller went over 800w and then stops charging, what could be the issue. It's not throwing any codes

Were you able to resolve this?

I have this Welion 24v 1.5kw hybrid inverter for sale.

Reason for Sale: I want to get a bigger inverter as 1.5kw won't be enough to serve my needs completely.

Package was only opened to content, it's never being used. on my singature.

Has a 40amps cc

fuckboys:
I didn’t get the battery anymore bro, I ended up returning it the next day and collecting 420w s with it. I ended up buying 4pcs of 420w Cworth s.


I have been looking for a great battery deal for a long time, this is the best deal of the decade. 3.6kwh for 450k is crazy.

450k for 3.6kwh is not even as crazy as you think, Deriy offers similar price for brand new Grade A cells with smart bms and you can monitor voltage of individual cells

Apparently you can't have it all in this battery market .

GloryJoyeux:


Hi,

This is data sheet for LF280k v3. Rated 6000 cycles at 0.5C discharge test.

Kindly stop spreading misinformation, if you are not knowledgeable on a particular subject it’s best to learn.

Hi, thanks for your response. Kindly post a link to the datasheet or better still highlight the information so we can all and learn. If 0.5C can deliver 6,000 cycles, then basic chemistry should tell you that less would provide more cycles. This is not misinformation, a simple search will point you to this.

While I ire your work here in educating people with valuable information, I think you should also be transparent in showing your prompt so we can . Prompting AI without being transparent is actually malicious. No offense.

AndroBlaze:


You've not shown anything or proven anything as unfortunately you've fallen into the same trap as the obnoxious guy that started this argument did.

First of all what was the question you actually asked the AI before posting your findings? I made it crystal clear the question I asked the AI.

Secondly, as majorly seen on the forum, what manner of cells is available to majority of Nigerians and what are they purchasing? Answer honestly please.

Thirdly, are you disputing the fact that slow charging (and discharging) produces less heat in every mainstream battery and that can only be a positive when it comes to longevity? Are you saying using a clear example, that if if Dam5reey1 had chosen (dishonestly BTW) to discharge the Haisic battery at a far less rate than he recently did (0.1c) he would have not gotten a higher capacity total and vice versa? Are you disputing that if one is able slow charge and meet all their requirements with inverters that run directly from PV they are being silly by not charging their lifepo battery within 2 hours (or less) and letting it sit pregnant and idly for longer, in want for a better word, a bloated state?

And lastly for now, and most importantly, this was what I initially posted:


Clearly that statement says "your battery will live longer if you charge it slower", is that scientifically TRUE or NOT. And note even if it does 1 or 2 extra cycles, that statement is proven true scientifically. The statement is not proven untrue because you deem those 1 or 2 extra cycles as negligible, that is your opinion (which we are all allowed to have, as I have mine).

My original statement can only fairly be compared to those common sense adverts of staying alive when driving and watching your speed based on the impact of having an accident at different speeds. At 10km an hour you are almost certain to live no matter what the collision. At 180km an hour you are almost certain to do fatal damage at any collison. Did we all now start driving at 10km an hour so we can live forever? Does that however disprove the science of driving slowly?

In short this argument has just been an exercise in doing what Nigerians love to do. Shifting a discussion "blindly" to what you want it to be for aggrandisement and not being able to it it. Like I've said clearly from the start, the info is there, chose what you want to achieve with your battery and charge appropriately.


https://www.youtube.com/watch?v=Vq6f7BScZ4c?si=6NZ4UyfVLdeYSZPy

No need to post too much references sef, even with a little research you will find out that the 6,000-cycle quoted for LiFeP04 is when charged at lower rates e.g 0.2C, 0.3C. Charging a battery too fast negatively affects longevity and this is also true for phone battery as faster charging generates a lot of heat.

Yes it can take 0.5C and more daily, but surely at the expense of lifespan. Even newbies know this is basic chemistry.

Please guys where is the telegram link to this awesome thread?

dollarnaira:

Wen the battery comes let me know.

Ok boss. Thank you

dollarnaira:


Let me tell you that you cannot use the said lithium ion you ordered on your fan because the charging profile does not match with lithium ion.

Rechargable fans charge up to 14.6v, hence it fits a lead acid and lifepo4 batteries.

The problem is not the lithium ion but the charging profile of your fan. To use it, charge via the 12v port not the ac to ac cord ooo (this will give u 14.6v).

If you want to charge the lithium ion to 12.6v via ac to ac direct cord, you will need a buck converter to reduce the 14.6v to 12.6v as this will serve as your cc for charging.

I can actually build a 5p3s here but the rumour of lithium ion here is just too much and laced with false.

I use lithium ion( over 200ah) safely for close to 3yrs now. Recently ran a submersible on it.

Na who get sense they use solar.

Wait o, I ordered a Lithium-ion battery 11.1v for my fan, does it mean charging it through the normal AC input is not advised?

I noticed that when I use the 12v Dc side to run the fan it runs at an even higher speed and the batteries (LA) gets hot.

Abeg make una educate me on this topic well before I go do wrong thing

HeavenlyBang:


Update on my order, it was just canceled as seller claims he's unable to ship to Nigeria.

This battery you ordered is 11.1v, though, keep that in mind.

My fan, for example, uses a 15v input, which is why the speed of the fan drops noticeably when it's using battery (12.8v). 11.1v may not be ideal. Give us when you can, however.

I think I fully understand now. My own fan speed drops on the 12v battery compared to when on AC power. I think the only solution is to get that 14.8v battery to be able to maintain a decent speed.

Well I don already order, let's see how it goes if it's manageable, I just need anything besides LA batteries coz the last one I bought didn't last up to 1 month b4 doing less than 1hr back up.

oloet:

Baba no try am, a reduction in volts for a DC application will affect the speed drastically

If I get a higher battery which will raise the total voltage to 14.8v, doesn't this imply that I can't charge with the normal 12v charger?

HeavenlyBang:


Update on my order, it was just canceled as seller claims he's unable to ship to Nigeria.

This battery you ordered is 11.1v, though, keep that in mind.

My fan, for example, uses a 15v input, which is why the speed of the fan drops noticeably when it's using battery (12.8v). 11.1v may not be ideal. Give us when you can, however.

I see. My fan uses a 12v input. I understand that on full charge this battery should be around 12.6v. I'm going for this size because the original space for the LA batteries is quite small, and I doubt a bigger one would fit.

Original space is for two 6v 4.5ah LA compartmentalized. With 11.1v and much better capacity I doubt the reduction in speed would be much. Fingers crossed.