Inside a solar/mains rechargeable fan / work light. (with schematic)

[@seanmangan2769]

I not only love "taking things to bits" but I love your voice! You could be a book reader for a second job.

[@jkobain]

R-rr-rr-right! ©

[@SeanBZA]

Met those SLA batteries before, and they are very light. Opened a dead one ( it was brand new, and did not want to charge, got a whole load of LED's out, which was the goal, they were cheaper than buying new) and inside it was 2 rather poorly made spongy lead plates per cell, with a very dry separator, and filling up the rest of the volume was some polystyrene sheet, crudely broken to shape to fill the cavity, that was obviously meant to have another stack inserted. Added some sulphuric acid to the one that had come apart easily, a few spots of glue used to hold it together, and it was then able to take charge. I estimated around a half amp hour capacity though, though the case was implying that these were 4Ah packs. Went with the other alarm batteries to the scrap yard.

[@carpespasm]

@Ad Lockhorst I wonder if that has a linguistic relation to "cole slaw", which is 'murkan for shredded cabbage salad with a bunch of mayonnaise and something acid like vinegar.

[@ActiveAtom]

Well living in a desert we are two guys to truly enjoy a fine personal fan powered by the very desert bright abilities we confront daily, nice to see you share it. Lance & Patrick.

[@weerobot]

The reverse engineering bits are great for learning...

[@darklydevious8156]

Really was quite interesting, nice to see some retro 80's "real" circuitry for a change, as opposed to the modern ubiquitous one chip does all approach. Well done Vince! (and you Clive :)

[@mrfluffytailthethird]

I want to see that jukebox in the background of his live stream Maybe a little video about how technology changed with PCBs or Maybe something on how simple lights were before LED and rechargeable

[@thomasherzog86]

neat device, thanks to vince for finding and getting it.

[@tazz1669]

Well done Vince top man bringing interesting stuff along for Clive to take to bits, so he in turn can keep us happy with his technical videos and excellent reverse engineering of how it all works.

[@LMacNeill]

That fan circuit was fascinating! Impressive reverse-engineering skills! I really enjoy this channel and learn a lot from it -- thanks so much, Clive!

[@wtmayhew]

This device reminds me of device I have: a nice little USB power bank with a bright LED array on one side, USB in and out, and solar panel on the other side. As long as I charge the device via USB it is great. If I put it in room light, the charge status LED bar graph comes on, but it appears the bar graph uses more energy than the panel generates, thus discharging the battery! In very bright sun it might work, but in room light I have to remember to keep the solar panel side covered.

[@wtmayhew]

China, Inc. is usually pretty good at minimizing to the bare minimum. I am a bit surprised the LED selector switch uses two 4.7 Ohm resistors, where one resistor would be sufficient (both LEDs can’t be on simultaneously, or can they?). I suppose that gives some flexibility for a future design change where the two LEDs require different current limiting resistors. The fan disable is actually kind of clever, I like that. The other missed opportunity is they could have used a two chip LED and saved the need to have a blocking diode on the solar panel; hard to say if a fancier LED or the extra diode would cost more.

[@Drew-Dastardly]

I've always known those "figure 8" connectors as Telefunken. In the '80s pretty much every radio/cassette deck or small TV had them as a sort of standard universal mains flex. I worked in TV/VHS repair back in the late 80's early 90's in the UK and always called them Telefunken. Mind you we worked on Grundig tellies too. I've only recently heard of Telefunken being referred to as "figure 8" or "infinity" cables. I think someone from 8chan (aka infinity chan) is trolling wikipedia with that infinity thing.

[@lostjohnny9000]

infinitechan is offline at the moment while the owner finds a new service provider. Some very interesting information has been posted on /patriotsfight/ which has shown us how Alphabet Inc manipulates the media.

[@urugulu1656]

well they are still today a very popular low power ungrounded mains appliance cord.

[@lostjohnny9000]

@@urugulu1656 They have given birth to the "cloverleaf" connector which is much more grounded.

[@keithking1985]

There's no ground on the fuckers. Dangerous 💥⚡

[@keithking1985]

@Indosarnia so your saying if thoses connectors had a gound/earth wire you would be dead. Is that what your saying...

[@geovani60624]

when he turned the fan on a breeze coming from my window hit my face... that scared me xD

[@Slikx666]

I think Clive being a god explains that.

[@theskett]

Pretty sure Big Clive's an agnostic (or maybe atheist) god, which adds a nice twist :-)

[@goose300183]

@Ad Lockhorst Blue Fanta?! I now need to find this for myself. Fascinating. The world is indeed still a wonderous and mysterious place!

[@c.r.3350]

I come along these devices while looking through gearbest etc. Always wondering if they are any good. Now I know, thanks Vince and thanks Clive.

[@Robothut]

I have had 2 of the power failure lighting units with the same looking sealed lead acid batterys in them, and they both would over time , say 6 months to a year eat the wires off where they attach to the battery's. I would clean the battery contact and snip off the wires and solder them back on only to have them get eaten off again in 6 months to a year. So there is some out gassing happening right where the battery contact posts are located.

[@BensWorkshop]

I would also like to pass on my thanks to Vince, the crew chief, cheers!

[@wallyman292]

Who else realized from the get-go that Clive forgot the second bottom screw?

[@licensetodrive9930]

I've always wanted an awkwardly shaped combined torch+fan+floodlight with a small weak solar panel to lug around when I go camping, this looks perfect!

[@youreds91]

Please do a video one day explaining what a bridge rectifier does, they seem to be in most things you take apart. While you're at it do smoothing too!

[@johnmorgan1629]

So, Vince is not just an artist, we have seen his doodles before, but he's a philanthropist as well.

[@jameswyatt1304]

Good engineering, reverse or forward. Thank you for sharing.

[@Nono-hk3is]

Thank you, Vince!

[@FireballXL55]

The resistor 1k2 max is also required to limit the base current other wise you would connect the 4V across the base and when the fan disable kicks in it would be a short across the battery,

[@zh84]

3:01 I like the expression "charging mouth"!

[@FSM_Reviews]

This man's voice has been rumbling my subwoofer for the past 16 minutes.

[@TheRailroad99]

looked up the Datasheet, the transistor seems rather special, with a 6 V Base-Emmitter voltage. Edit: OK, you were correct, it seems like this was the maximum (breakdown) voltage, not the operating voltage. So forget what I have said, it is indeed a generic NPN

[@urugulu1656]

make sure that you got the right one b/c i know that transistor (got it at home) and its everything but special. also keep in mind that even though it says d882p on the to package its a 2sd882p...

[@erikjohansson1814]

Rubbish, nothing special or spectacular about it.

[@ProdigalPorcupine]

Are you confusing base-emitter voltage with *reverse* base-emitter voltage? It’s just a very popular, standard, medium power transistor like the European BD13x ones.

[@stephanevally170]

FULL BRIDGE RECTIFIER !! (KZbin recommendation leads to an ElectroBOOM episode ) :D

[@OliverONeill]

Why didn't they just use 1 x 4.7 ohm resistor before the switch instead of 2x after? Would save a few pence.

[@bigclivedotcom]

Probably to allow different resistors for different lighting configurations.

[@millomweb]

Hey, that's my comment ;)

[@JasperJanssen]

When the switch fails and turns both on simultaneously, though!

[@millomweb]

@@JasperJanssen Quite possibly not possible !

[@Io1564]

Ahh! Finally, at last, a cooling fan! Just what yer need in Caledonia!

[@tgfcujhb7583]

Don't go to northern Australia , she don't drop below 30*C.

[@m101ist]

Where this ?😎

[@tyttuut]

@@arandomguy4478 Real degrees, not freedom degrees.

[@anthonyshiels9273]

I have just ordered 2 of these from Fruugo. The colour is brown which will be more suitable for my decor than the blue one shown here. I REALLY believe in a harmonious colour scheme. 35.95 European Currency Units each.

[@ropersonline]

If I were to hazard a guess, I'd say those four diodes that all do different things were probably grouped in that way in the same place for ease of assembly. These through-hole technology (THT) components were probably soldered in by a low-paid human. I know there are pick-and-place machines and soldering robots that can install THT components too, but I'm guessing this PCB had humbler origins w/o anything as fancy as that involved.

[@jlucasound]

Thanks, Vince!! I love that battery, as well as the design.

[@Richard-zu3gz]

I'd advise the rubber glove trick for the smoke detector if it's a major concern. Just rubber glove over the detector, large yellow gloves

[@simontay4851]

Or a sock.

[@keithking1985]

Tissue paper. They had them in jail and lads who "smoked" used tissue paper stuffed into them. It works.😤😥😧😊

[@georgestewart5879]

Shower cap works a treat too.

[@carpespasm]

I do commercial fire alarm/detection, and it's totally not kosher, but cling film/saran wrap, masking tape, a shower cap, a rubber glove, or just about anything can be used to cover over a smoke detector. Be sure not to remove it, as that'll send a trouble signal to the fire alarm panel, and be sure to take your obstruction of choice off of it when you're done taking apart random electronics.

[@keithking1985]

@@carpespasm the ones in prison don t set the alarm off when you are just smoking normal tobacco but they do when weed was smoked!! How do they work?? Can they be sensitive to certain types of smoke or something? ?,

[@twotone3070]

Hurrah to Vince for an interesting purchase.

[@hollyellen5309]

I must admit, I use these videos to help me sleep, your voice is so soothing 🙈

[@bigclivedotcom]

A lot of people use them to aid sleep.

[@Sk8rdad420]

#BigclivedotcomASMR

[@FindLiberty]

...just don't leave it (in your dream) plugged in, unattended.

[@BSOE3058]

It would be perfect soldering fumes succer, just swap the polarity on the motor ;)

[@theskett]

Or, y'know, just turn it around ;-)

[@BSOE3058]

@@theskett well, I also want to use dat nice light ;)

[@GeorgeJFW]

Great idea!

[@BSOE3058]

Sucking would be more helpful, I would just add Carbon filter and bang! no more fumes in my tiny room

[@theodiscusgaming3909]

@@BSOE3058 yes you could just turn it around and put the filter on the back

[@ricknelson947]

I miss wandering around aimlessly for hours at the electronics market in Singapore. I hope Vince got to go. How bout a lithium ion modification.

[@pulesjet]

Somewhat Weird Form Factor but I would think quite usable ?

[@SteveSummers]

Enjoyed Clive

[@alsternerd]

That discharge "zing" is something I get quite often from a lot of notebook chargers, mostly fujitsus, but also some older lenovo ones.

[@jcthe2nd]

Cash Converters International Limited is an Australian retail pawnbroking company

[@robbieaussievic]

...... You forgot 'Loan Shark'.

[@qwertyasdf66]

Huh. I spent my entire life assuming cash converters was only a New Zealand company.

[@jcthe2nd]

@@qwertyasdf66 no there in alot of country's look at the wiki article on them

[@twotone3070]

We have them in the UK as well, sort of mainstream high street fence.

[@MaltaMcMurchy]

They have a presence here in Canada, as well.

[@ketas]

i think i suddenly realized why the similar light, i found being thrown away, did blow up! the sla just dried out and went open circuit. that removed the only voltage stabilizer from the circuit and led got ~300vdc. explains black spots in that package and, iirc, red charging led being split half with force of the mains i guess that was only reason it failed...

[@jaksmith6465]

how about those electric generating camp stoves that turn the fire into heat? would love to see that broken apart

[@carpespasm]

AvE has you covered. kzbin.info/www/bejne/hoq8qGSZjrhrpZo

[@ionicwake]

I want a few of these for camping. Very cool

[@SquishySenpai]

I'm guessing the fan starts at high because that's what most fans do. If you buy a box fan, oscillating fan, tower fan etc and it uses a knob for power selection, it usually goes Off, High, Med, Low.

[@bigclivedotcom]

It's to give them a boost at full power to make sure they start.

[@kurtmagnus5243]

I have one but I hardly see them around anymore. I only see one on eBay. I would like to fine out where to get more

[@jamesplotkin4674]

If one forgets to turn off the fan while on it's lowest setting and begin a charge, upon removing the charger cord, with the fan not rotating without a bit of a nudge, does that stress the circuit, or overheat the fan motor because it's not rotating?

[@bigclivedotcom]

I think the current is limited to a low enough level at that point not to be an issue.

[@ilb6nulb9]

So it states "don't use while charging cause possibility of electric shock" yet it wont let you use it whilst charging? Also would fan disable also kick in charging from the solar panel?

[@LominatySpy]

Hello guys, I'm really interested in electronics but I got no clue of basic knowledge to understand this. Can someone recommend a series of videos or a place where I can get some basic electrical knowledge to understand these stuff? Thanks

[@Atlene]

just watch his previous videos :)

[@cheyannei5983]

More Clive videos; his older ones. I had no idea when I started watching, either. I've been watching a while and I still had no idea what the fan circuit was doing until he explained it, so this circuit isn't the easiest one to understand.

[@ZZtop-gg3lu]

You can start with Clive's "A simple guide to electronic components" kzbin.info/www/bejne/bH7Eomh_rq2Gq8U

[@thehappylittlefoxakabenji8154]

Lominaty Spy you could have a look at Owen Bishop Electronics a first course its a book which is like the internet but made from a tree !

[@mCKENIC]

What a cool little yoke!

[@AntonioClaudioMichael]

Great video big Clive

[@the-heavy]

Ah, good ol' Cashies; a garage sale with dedicated business hours. DankPods would be proud.

[@sleekweasel]

The fan is disabled so the battery charges faster (or at all)? If I wanted the fan on all night, I'd happily leave it on but charging slowly. Unless there's an overcharge problem?

[@RadioJonophone]

If the LED series resistors are both the same value why two? One less component if the resistor were between the power and the central arm of the switch. There is no facility for having both LED lamps on at the same time so no need for two resistors.

[@chrisengland5523]

Hmm, not very many comments from folk who are keen to rush out and buy one. It's a sort of torch (but too big), a fan (but too weak) and a work light (but too fragile) - the sort of thing my granny might have bought me for Christmas.

[@Leatherkid01]

Is that a shaver adaptoror a 13A one 🤔? Love your vids

[@roughshaf7321]

I had bought a chinese trimmer and yesterday decided to open it just to see how it charged its 1.2v Ni-Cd battery from mains with all the circuitry inside. I opened it and understood nothing(Not that good at electronics lol), but it had very few components. Later I saw it was charging the 1.2v battery with 4 volts and was wondering if that was safe?

[@electroniquepassion]

🇫🇷👍👍Thank you 👍👍🇫🇷

[@pomonabill220]

What is the solar panel's short circuit current, and open circuit voltage

[@bigclivedotcom]

No sun to test it right now, but the voltage will be around 6V and I'd estimate the current at 100mA.

[@nataliesilsbury1888]

Cash converters is an Australian company. This looks like it's in AUD. Not Singapore

[@Neovo.Geesink]

Are those currents calculated, or realy measured? 7Ma through a LED in the 30-Led Array seeems a bit low. How do dey get so much light out of that?? I wonder how much current the Fan will draw on various settings.

[@DjResR]

It only takes few uA to visibly light a modern InGaN LED._

[@TheZombieSaints]

Not sure about Singapore, but here in Australia they are a notorious second hand shop.

[@bigclivedotcom]

And in the UK. Notable for selling stolen items.

[@a178design]

@@bigclivedotcom"Procure" $100 item from retail shop, walk to a "cashies" just down the mall a bit, sell to them for $10, cashies then sell it for $60.

[@robbieaussievic]

..... And 'Loan Shark' !

[@kargaroc386]

>thumbnail meh >capacitive dropper go onnn

[@YodaWhat]

It's a bit odd that they did not use a 555 timer chip, or perhaps a 556 dual timer chip, to slow the fan and provide dimmable light, both efficiently, by using the PWM capability of the venerable chips... which also have a significant current drive capability, all at quite low cost.

[@echothehusky]

I wonder why they didn't just put one 4.7 ohm resistor before the selector switch instead of one on each leg after.

[@bigclivedotcom]

Probably so they could use different value resistors.

[@FindLiberty]

Yes, there's a free resistor there. Just think of it! Cut that trace, move ONE 4.7k and remove the other one (for the spare parts bin). Add two jumpers and you're good to go. lol

[@Sco1t19]

would it over charge the battery if left plugged in too long. There does not seem to be anything to regulate it.

[@bigclivedotcom]

Sealed lead acid batteries can tolerate trickle charging.

[@m.s.8112]

I'm wondering about the motor's voltage rating. 5 volts?

[@SianaGearz]

How do you mount a camera for top down video in a temporary accomodation like this?

[@keithking1985]

Here's an idea for a video!! An electric kettle. Unless you have one already. But I don't think anyone has done one on a kettle. Sure would be interesting to know if it's worth using anything in one for anything eles. ..

[@techydog7854]

You're only late by three years... kzbin.info/www/bejne/oV6roKCjo7ZlldU

[@o0julek0o]

Someone on r/functionalprint has just recently posted a fan they 3D printed that looks basically the same but purposed for a mini fume extractor for soldering

[@kennmossman8701]

doesn't the 1K2 resistor in the fan section - connected to the pot also limit current thru the pot?

[@B-System]

Technically it does, but this doesn't mean anything to the circuit.

[@kennmossman8701]

@@B-System Then why include it? I

[@Nickillik]

If heaven exists, it'll just be a constant looped compilation of all the times Clive ever said "zing" :)

[@reggiep75]

This is so good, it's bad... It's sacrifice was worthy.

[@NomadOfNorad]

Pretty easy to put it all back together, looks like... and I'm sure he probably did.

[@3dkiwi920]

Cash converters is a New Zealand 2nd hand/Resale shop.

[@tgfcujhb7583]

OZ too.

[@SproutyPottedPlant]

UK too.

[@ADR69]

Wait so they have a diode directly connected across the rectifier? That's not safe right

[@Slikx666]

I have a question regarding the capacative dropper. But if you answer please keep it simple. 240v @50hrz from the plug goes into the dropper, I'm ok with that part. After the bridge rectifier we'll call it 12v @50hrz, I get that. But as I understand it the capacitor acts as a diagram pump, without letting the actual current through because the frequency is higher than the capacitor can react to. (Ish). But when a discharge resister is placed into the circuit. What stops the current bypassing the capacitor through the resistor and letting 240v through? In my head it makes no sense having the capacitor if you have a resistor. Hopefully I've typed this in English, and thank you for your answers. 😃

[@simontay4851]

The resistor is of high enough value that it passes very little current. use an ohms law calculator.

[@Slikx666]

@@simontay4851 Thank you for the answer. That makes sense in my head. 👍

[@adamisaacapetroaie]

“12.90 Singaporean dollars, I presume” Yes Clive, we use dollars here.

[@matthias18]

Tbh if this was made with more quality it would be awesome for soldering

[@americanrebel413]

Very cool! Is there an advantidge for using the lead acid battery? If so what would that be? Thank you BC!

[@simontay4851]

High capacity and ease of charging.

[@americanrebel413]

@@simontay4851 ok thank you for the info! I appreciate it.

[@LakeNipissing]

As soon as I saw this device, the first thing that came to mind was a similar camping fan / light which was smashed to pieces by Kenny (Smashstuff30) with a golf club, and then he commented about the obliterated fan: "What happened to your twirly fantasticness?"

[@shadesofsylar]

Does the red light turn off when its finished charging?

[@bigclivedotcom]

No.

[@kennmossman8701]

shouldn't there be a reverse biased diode across the fan?

[@watchloversng]

But my own battery doesn't last. What can I do. Once I one the it goes off in 15 minutes

[@jays2002]

New desk Clive. You've changed ;)

[@bigclivedotcom]

Temporary work related accommodation.

[@ProfaneGod]

that adapter? is there a fuse between the plastic ground pin n the other pin?

[@urugulu1656]

plastic usally is non conductive so that would be quite useless anyway

[@jamesgrimwood1285]

@@JamesMears76 And I can confirm it doesn't stop older kids and smartish adults though. I was about five when I figured out the middle hole made the two bottom holes open. Then I realised I could jam the two pin plug from my bedside light in there, instead of the 1980s version of a deathdapter 😀

[@MalagasOnFire]

Do you have access to male / female mains socket and some wires ? With clamp meter could measure current from live or neutral, however it would lack the power factor. aie aei aei gate current :P

[@urugulu1656]

exactly its a npn and neither mos nor igbt... npn dont have a gate. but the message comes across quite well.

[@MalagasOnFire]

@@urugulu1656 Yep it passes thru right well on bjt :P we also do that once a while.

[@vijendrashirodkar9247]

Clive u have not tested the solar panel output current.

[@JESUSSDAD]

Clive why does the usb cable on my Samsung phone chargers trigger my voltage detector probe rated 90-1000VAC? Im scurrred.

[@bigclivedotcom]

There's a slight AC coupling from the input to the output. The voltage detector is sensitive enough to pick that up.

[@wthornton7346]

Thanks Vince, appreciated.

[@mysock351C]

13:40 thats some quality fanspin there.

[@FindLiberty]

but is it as reliable as an Apple motherboard repaired by LR?

[@2lefThumbs]

Two bridge rectifiers? Surely you could have used an echo effect?

[@millomweb]

10:24 surely if they put ONE 4.7 mO resistors before the sw they'd only need one resistor ?

[@bigclivedotcom]

They were probably allowing for different currents for different LED options.

[@stephtronix1811]

Interesting little battery would like to know more about it great video keep up the good work.

[@roystone5232]

That looks like a 4 Volt, Sealed Lead Acid battery.. Probably 1 to 1.5 amp max(guessing based on size?)... Very common where I live.. costs around 75 cents to $1.20 for a 1 amp.

[@JDtheEE]

Is it just me or would that make a good Soldering station "Fume extractor"- I don't use one but I know i'm supposed to. (Just like how your not supposed to drink, walk on the wrong side of the road, J-walk,etc.)

[@theodiscusgaming3909]

Honestly, you don't even need the 'extractor' part of the fume extractor if you're not soldering full time. Just get a PC fan and let it suck the fumes away, and have some ventilation so that they don't build up inside the room.

[@HA05GER]

Use one of these at work I have 3 of em just with out the light really good but they eat battery. Have power bank plugged in to keep charger

[@captianmorgan7627]

Clive, I have a failed Flowline LI55-1211 4-20 mA digital level controller. This is the second unit that has failed mysteriously at the same location. You want it to take to bits?

[@bigclivedotcom]

In what way is it failing?

[@captianmorgan7627]

@@bigclivedotcom Rather uneventfully. The first unit lasted about 1-2 years then it either displayed nothing or showed nonsense information, I'd have to ask the site's technician again which it is. We replaced it with the same model unit. Which suffered the same fate about 1-2 years later. Nothing else in the panel has any issues. There was an electrical storm around the time the second one died. It may or may not have had anything to do with the second units death. As best we can tell the two units died for no discernible reason.

[@captianmorgan7627]

@@bigclivedotcom I talked to the tech and there were 3 failed units, each replaced the last. The last two, and maybe the first, failed during lighting storms. The weird thing is that these are the only failures in the panel. The panel is on top of a hill, against a 15' tall above-ground storage tank but the only signal/power to the unit is from a sensor at the bottom of the hill that is hooked to a panel there (no failures in this panel either). There is 120v power in both panels for other uses (including powering the sensors that send the 4-20 mA signal) and it is protected against power spikes. The power comes from the panel at the bottom of the hill. Both panels are grounded. Nothing else in either panel was damaged, including another identical Flowline unit hooked to a sensor in the tank, that was installed at the same time as the first one failed.

[@bigclivedotcom]

@@captianmorgan7627 Is the unit mounted at a remote location with the signal wire passing between buildings? It could be a voltage gradient issue from lightning strikes. It's possible you could use an Ethernet style surge arrester to shunt excessive voltage spikes to local ground.

[@jp040759]

WHY does the fan spin up to high speed for a second or 2?? You DID NOT analyze why that occurs!! Please do.

[@bigclivedotcom]

It starts at the highest speed when you turn it on and as you turn the knob further it slows down. Most fans start at full speed to get them running.

[@jp040759]

@@bigclivedotcom Thank you

[@N7-alpha]

Still enjoying your cat phone sir...😀

[@muh1h1]

I find the Choice of SLA battery super weird, nothing uses Lead batteries anymore. Do you think they just wanted to use some old stock or did i miss something else?

[@bigclivedotcom]

They've been appearing in a lot of things. It's possible that the lead acid battery manufacturers are trying to compete with lithium and offering very low prices.

[@muh1h1]

@@bigclivedotcom intresting, i've not seen one in a while!

[@DC-wv2zg]

One thing I would add is, that Lead acid batteries are classified less dangerous for shipping than lithium batteries. That means, shipping might be cheaper.

[@dingo137]

Lead-acid is still used in a few places (most obviously car batteries). What did surprise me is when I bought a small cordless drill just a few years ago and found it used a NiCad battery. Not seen one of those for a while.

[@rpavlik1]

Have a kids ride-on toy that uses a SLA pack, that once you peel off the sticker, is just two fairly standard, and thus cheap (under $10 each iirc) "emergency exit light" SLA packs connected in series with a thermal fuse. Still seems weird though, given how easy it is for me to kill an SLA battery.

[@millomweb]

Would have liked you to have positively confirmed the battery chemistry. (Or negatively not confirmed the battery chemistry.)

[@bigclivedotcom]

I took one apart in another video. Chunks of lead and fibreglass soaked in acid.

[@michaelthibault7930]

Solar >> trickle >> SLA, no?

[@millomweb]

@@michaelthibault7930 Solar only needs to provide up to 14·6V through a diode (for a 12V battery) = no issue. I often see comments on 'fancy chargers for LA batteries - but they actually look after themselves - give 'em 14·6V and let 'em soak up the current as they need it. Obviously multiply the difference according to the actual battery voltage.

[@edifierbass7821]

So on this one the Battery charger has no cut - off, it will continue to charge

[@bigclivedotcom]

It appears that these types of battery are OK with continuous trickle charge.

[@edifierbass7821]

@@bigclivedotcom Ok now I know thank you so much and I hope it can be modified with full charge indicator thanks