A look inside the Duracell PB2 power bank.

Рет қаралды 342,883

5 жыл бұрын

I got this from a large UK supermarket chain called Sainsburys but hadn't got round to doing a test on it yet. Quite well constructed with LG cells, an unusual control PCB with a few tricky to trace components and a thermistor for battery temperature monitoring. Notable features are the decent control chip they seem to have used and the matching beefy inductor.
External cell capacity test is a respectable 6400mAh. (3200mAh per cell)
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
www.bigclive.com/coffee.htm
This also keeps the channel independent of KZfaq's advertising algorithms allowing it to be a bit more dangerous and naughty.

Пікірлер: 791

@blackkokomew1 5 жыл бұрын

Big clive the only person who can say "which version is this is this the disco version" and not get questioned

@rougenaxela 3 жыл бұрын

I think this might be the highest quality power bank I've seen taken to bits on this channel! Handles 2.5A without much sag? Thermistor for cell temperature protection? Some good quality cells? All in a nice relatively compact form factor? Color me impressed. Much different from the usual fare around here. Of course, it's nothing special compared to what is possible or should be done... but compared to what typically gets taken to bits on this channel? Yeah.

@nikhildabas 5 жыл бұрын

An interesting feature in this series of Duracell powerbanks is that they do pass-through -- you can charge the powerbank and power the load at the same time. Would have been nice to test the current limits in that mode.

@ezg8448 5 жыл бұрын

I found it odd that a measly 5V power bank would have so much circuitry and a temperature sensor, it’s overkill plain and simple. But having passthru charging would explain the need for that that stuff or at least justify it more.

@chrisredfield3240 5 жыл бұрын

@mharris1270 the Anker ones always exceed my expectations i have at least 6 and recommend them to anyone

@chrisredfield3240 5 жыл бұрын

@mharris1270 get losses on all battery's ah is very misleading some would think a 10ah would run 1a for 10 hours its nothing like that not even half that. Even 0.5amp for 20 hours never happens. I only ever buy anker or Samsung leads

@kitecattestecke2303 3 жыл бұрын

@@ezg8448 what? Lithium cells go bang and fire so its a good thing they have lost of components to monitor. When the cells is old or worn out this prevents a hot fire in you bag/house or on plane ... This power bank is truly good from safety perspectives

@kitecattestecke2303 3 жыл бұрын

@@chrisredfield3240 ankers is not bad but is not top tier as their powerbank's also swell and go up in flames. I had a bigger one from banker which got puffy and bursts its case while charging. Bought it off amazon in Germany two years ago. The basic tip is, go with brand and round style case with 18650 inside as it is much safer.. Anker mh no maybe Duracell or IKEA? Sure yes

@Calum... 5 жыл бұрын

Drunk Scotsman eats alligator and rips apart battery

@maicod 5 жыл бұрын

go shame yourself please

@Calum... 5 жыл бұрын

@@maicod no u

@Daa253 4 жыл бұрын

@@maicod r/woooosh

@platesomeat 3 жыл бұрын

He's Manx.

@Calum... 3 жыл бұрын

@@platesomeat He's Scottish. kzfaq.info/get/bejne/fJyfma-axLjIYok.html

@someguy1293 5 жыл бұрын

"Jagermeister: Its good assuming you like it" A ringing endorsement lol

@Varangian_af_Scaniae 3 жыл бұрын

Jägermeister is fantastic when it's ice-cold. The taste changes drastically between room temperature and freezer cold.

@someguy1293 3 жыл бұрын

@@Varangian_af_Scaniae yeah its not bad, its just the great endorsement of "its good assuming you like it" that was great lmao

@finmueller7827 3 жыл бұрын

Ay, its an honest endorsement

@davidreynolds4684 3 жыл бұрын

Ha i knew it. LG cells in a duracell device. Makes me think that when replacing cells in a battery pack i should look for LG brand.

@pigrew 5 жыл бұрын

The inductor is used for both boost and buck (charging and discharging) using internal MOSFETs in synchronous dc-dc converters. The ADC is used for its fuel-gauge feature, and can be read from a microcontroller via I2C. A short button press turns on the circuit, long one turns it off. A double-press toggles a flashlight.

@1kreature 5 жыл бұрын

Datasheet sais it is 96% eff on load and 97% eff on charging. Seems to use the same inductor for boost to out and drop to battery. Quite nice.

@kevinmartin7760 5 жыл бұрын

I was thinking the same thing (same inductor for buck charge and boost discharge) myself.

@Neffers_UK 5 жыл бұрын

I really appreciate the high quality pictures you print Clive, I can't imagine it being cheap to produce those, so, thank you.

@robinwells8879 3 жыл бұрын

It is easy to take for granted the amount of work that goes on behind the scenes to produce these gems.

@Zenodilodon 5 жыл бұрын

That is a quite nice inductor, it will for sure handle 2.5 amps just fine. It's mind blowing how efficient those little boost chip internal mosfets have gotten.

@MrCoolGuy2303 5 жыл бұрын

The spudger has become the spudgee

@Choice777 5 жыл бұрын

spudgeded.

@linKhehe 5 жыл бұрын

Spugindeed

@djchronicus7168 3 жыл бұрын

the fact that you took the shot and got the munchies in the beginning of the video immediately made me subscribe and your content is amazing

@deflex23 4 жыл бұрын

You give the best reviews on KZfaq and quite accurate and precise, instead of the others who just talk total nonsense...

@Oberyn_Martell 3 жыл бұрын

What an unbelievable video. I watched it, didn't understand a single thing. Just captivated by the knowledge. Good work. I'm sure if I know anything, I would be even more captivated.

@tin2001 5 жыл бұрын

My dad and a friend gave me some "Home Brand" light beer when I was about 11... That put me off alcohol for life. Now as an adult, it's more about the cost - I'd rather spend my money on cheap Chinese electronics 😂

@ronaldbrown9638 5 жыл бұрын

Lol

@S.ASmith 5 жыл бұрын

You know it's an interesting video when Clive puts his load into things.

@anthonybarra2391 2 жыл бұрын

Catching up on your channel, can't put it down. So interesting and your personality shines through. Great stuff thanks big man

@mikecummings7054 2 жыл бұрын

I found one of these Duracell power banks in the woods near where I live. Mine is smaller model number PB1 it's round in shape, 5v input 2.4A max output 1.2A max. I charged it up an it seems to hold a charge, I can charge my vape an phone of it. It's good to see it's a quality build. Your power bank is larger than mine. I charge it using my phone charger as it's the same voltage. These seem much better than the cheaper ones.

@Cypeq 3 жыл бұрын

Is this first powerbank with genuine, quality, high capacity cells in it and with thermistor to boot, I'm impressed. They have good product this tear down is best advertisement there could be.

@BrokebackBob 5 жыл бұрын

Bravo Clive for using the excellent Motorola TurboPower charger!

@SelthBlackwings 5 жыл бұрын

Staaaaaab the battery, stabb it stabb it good

@XenXenOfficial 5 жыл бұрын

owo

@herrservus1051 5 жыл бұрын

@@XenXenOfficial what's this :3

@crimsonhalo13 5 жыл бұрын

You'll get some stabulous fireworks, for sure.

@Kuraio 5 жыл бұрын

@@XenXenOfficial * Notices your bulging battery

@RFC3514 5 жыл бұрын

It's called "tigging" the battery.

@madbstard1 5 жыл бұрын

The Big Clive Show, brought to you by Jägermeister :D

@enricokitzler138 5 жыл бұрын

Haha I can relate

@alex_inside 5 жыл бұрын

Am I the only one who hates this stuff?

@FerralVideo 5 жыл бұрын

I use the flashlight to bypass the "low current shutdown" feature on one of my powerbanks. (I also use it as a flashlight, but this is more fun because it's an unintended feature!)

@robertcalkjr.8325 5 жыл бұрын

Thanks Clive. I gently squeeze devices with my Panavise and adding a little alcohol to get them open without tearing them up. But sometimes it doesn't work very well. The Chinese do make some pretty good adhesive.

@spikeydapikey1483 5 жыл бұрын

Do you ever feel the need to 3D print another case for these things, or do they all just go into a large box of 'stuff' ??

@bigclivedotcom 5 жыл бұрын

They get scavenged for the cells if they don't go back together.

@PunakiviAddikti 5 жыл бұрын

@@bigclivedotcom you might want to reuse the circuitry, it's pretty sophisticated and efficient.

@fusseldieb 5 жыл бұрын

@@bigclivedotcom I've bought a "Miboxer C4" to charge all my 18650 cells. It also charges a LOT of others and A,AA,AAA also. It measures accumulated mAh, chg. time, chg. current, chg. voltage of all 4 cells simultaneously. Best purchase I've made in some time, I highly recommend it (In case you don't have a proper charger for those)

@AcheForWake 5 жыл бұрын

Yay, been looking forward to this one. As I’m considering buying one.

@oswith971 5 жыл бұрын

You should take a look at some cabinet lights on eBay, they basically mount on the hinges and have a switch that turns on the light and they use an L1028 battery which I haven't seen used anywhere before to be honest If they're actually half decent you can get them for around 0,40-0,50£, could light up all of my kitchen cabinets for like 3 bucks excluding the batteries

@unclejohn5012 5 жыл бұрын

I've been eyeing these off. Really want a video before jumping in.

@YoutubeAdministrator 5 жыл бұрын

I have had these for a year or more. Works great. Haven't changed a battery yet. Except when i forgot to close a cabinet over the weekend

@YoutubeAdministrator 5 жыл бұрын

Not that interesting though seems like it is just bridged straight to the battery with a resistor.

@kall399 5 жыл бұрын

I think they are camera batteries I remember similar batteries used in film cameras.

@jkmacgyver 5 жыл бұрын

L1028 is very common in remote controls, garage transmitters/etc A23 12v

@praisetheffun8802 5 жыл бұрын

Always a great moment in my day when your videos pop up on my feed! Quick questions: What's the usb load device you are using? Also, what do you think is an effective way to learn electronics and/or circuitry? Future appreciation of an answer and more videos! Have a great day!

@branak 5 жыл бұрын

Thank you! You reminded me that I have a bottle of jäger in the back of my freezer. I'm at work atm but I know what I'll drink a glass or two of when I'm home =)

@Sol17Opacus 5 жыл бұрын

Florida loves Big Clive.

@BenMitro 5 жыл бұрын

Dear Mr. Jägermeister (you are what you drink) - this looks like a quality powerbank. We cannot yet get it here in Australia, but elsewhere there appears to be a single cell, dual cell and triple cell version 3350mAh, 6700mAh and 10050mAh (as advertised on an Indian site).

@GeekMustHave 5 жыл бұрын

4:09 This is not going to plan. OK, this is something we hear so often that this kinda makes it "The Plan". Just Love it. Keep broadcasting!!

@4shaw724 5 жыл бұрын

Mole grips on things like that work well :) also use air duster liquid to cool it down a lot to see weak heat might work Clive.

@SkyChaserCom 5 жыл бұрын

Watching here from South Florida in the USA - Greetings!

@tornagawn 5 жыл бұрын

Inspired by your good self, when I tried to resurrect my Samsung phone (GT-B2710, not that ‘smart’ but very rugged) and noted the bulging battery pack, I did some disassembly. Sure enough, under the top is a circuit board with little electronic bits! Presumably charging control circuitry stuff..(my electrical knowledge is limited to a 12 month stint training as a BBC transmission engineer in the 90’s as a career break, before returning to medicine. Favourite transmitters were the BBC World Service array near Penrith, with a hall full of massive valve amplifiers. They carried some serious current. I have therefore opted to buy an OEM 1300 mAh replacement battery rather than a no name 750 mAh for 60% the cost.

@JGprojects 5 жыл бұрын

I have one of these, it's about three best quality I could find after trying others. Interesting feature which I don't think you mentioned is the charge through facility which charges the cells and the load simultaneously.

@MarkUKInsects 2 жыл бұрын

Yes, I have its bigger brother and am really impressed with it. I found a lot online at prices that were far too cheep to be believable, clearly fake copies. So bought direct from Duracell.

@freesaxon6835 5 жыл бұрын

Suggestion for a tear down 'what is the fault ' video P.I.R sensors for household floodlights, these days they all seem to fail with a ' light stays on ' fault. Only temporary cure is a hard reset on the fusebox

@eliaschnl 5 жыл бұрын

Seen those at the 4.5£/kg nick nack section in the local equivalent of a goodwill. They have expanded to 3 boxes full of various powerbanks.

@yydcool 5 жыл бұрын

for the datasheet on 13:42, I translate some: "...it use single inductor to boost and buck... synchronized boost, 96% efficiency..."

@marc-andreservant201 5 жыл бұрын

F1 and F2 on the data pins are ferrite beads, which are used to suppress EMI. The control chip has a clock signal, so it is subject to EMI regulations.

@4wdsome444 5 жыл бұрын

I have had one for quite awhile, it is the only “2.4amp” bank I have had that will charge an iPad whilst using it, and I get 2 nearly three charges of my p9 lite which has a 3000mah battery

@matakaw4287 5 жыл бұрын

I'm impressed with the capacity of these cells. They would be great for replacing the shite ones in my laptop. Great video as always, cheers.

@fusseldieb 5 жыл бұрын

I was thinking of making mine "user-replaceable", drilling a hole in the bottom of my notebook and then putting some spring loaded 18650 battery holders in there. As I have a LOT of 18650 cells, I could take some with me and replace them on-the-fly when they discharge, lasting all day long with battery charges. The problem is: These battery circuits have a memory and save how much capacity the batteries have left. This would mean if I put a single pair of almost dead batteries in there, it would say that I need to "replace the battery" and it would never recover with that same chip, even if I put good batteries back. Basically: The chip does planned obsolecence for you. Nice, huh? Damn.

@matakaw4287 5 жыл бұрын

@@fusseldieb An external battery pack would work..one that plugs into the normal charging port. GreatScott! has a youtube channel where he builds one and it could easily be scaled up to last a long time using many 18650s.

@fusseldieb 5 жыл бұрын

@@matakaw4287 I saw that video, but a notebook power bank is bulky. I just wanted to carry some additional batteries in my pocket...

@matakaw4287 5 жыл бұрын

@@fusseldieb It's all about safety.

@fusseldieb 5 жыл бұрын

@@matakaw4287 Nothing that can't be reverse-engineered.

@BrokebackBob 5 жыл бұрын

Bravo to Duracell for quality components and design and zero potential lawsuits.

@eideticex 5 жыл бұрын

The spiceyness of the jerky is from "Cajun". Cajun seasoning is an awesome seasoning as it has a link to acidity. The stronger the acidity of a dish, the spicier cajun gets. You can actually make dishes that taste cajun without tasting at all spicy, which is a unique and wonderful taste of it's own (think Arby's fries).

@TheBertjeT 5 жыл бұрын

The Aldi in The Netherlands and in Germany sometimes carries Mummelmann. It's jager-like but has a lower alcohol percentage and is smoother. If you're ever in one, keep an eye out for it. It's also cheap.

@gavincurtis 5 жыл бұрын

I quit drinking 3 years ago. I will partake in spirit as we dive into this power bank.

@kardeef33317 5 жыл бұрын

Some devices like this require a double tap on the button to turn on the flashlight led. Thanks for another great video Clive !

@bigclivedotcom 5 жыл бұрын

I tried both the double tap and long press. I'm guessing it's just a MOSFET inside.

@markam67 5 жыл бұрын

Jagermeister AKA NyQuil (in the US it is a night time cold medicine with nearly the same flavor). Which as you state is really good if you like that flavor , as I do, will work just as good on coughs as NyQuil I would suppose. :)

@tuxontour 5 жыл бұрын

You can also find out if it has a step down circuit if you put your meter in series with the battery while charging. Is the batterie current higher than the USB current you have a step down converter. If the batterie current is lower oer almost the same its a linear regulator. I mean if you have the case open anyways than it makes sense to do so. If you dont want to touch the internals than the method with charging discharging is the way to go.

@BrokebackBob 3 жыл бұрын

Clive, Duracell is a HUGE battery company based in the US and they hate safety related class action lawsuits. Imagine that!

@AntonioClaudioMichael 5 жыл бұрын

great video Clive thats a Very Nice power bank

@dorbellbuster2011 3 жыл бұрын

I have one its absolutely fantastic

@peterzingler6221 5 жыл бұрын

Really nice design

@RooMan93 5 жыл бұрын

It's always nice to see Charlie-plexed leds

@bikkiikun Жыл бұрын

If you want to build your own powerbank, with this injoinic chip (or its cousins), you'll find several pre-buil pcbs. But of curse you can get the chip and follow the reference designs in the datasheet.

@hob991 5 жыл бұрын

Seen these in Morrisons too along with a smaller round one (presumably one 18650 inside)

@memescoep8851 3 жыл бұрын

Awesome video!

@ChargerLAB 5 жыл бұрын

Damn, you get all the stuff on the datasheet correctly. The 14bit ADC is used to measure current and voltage.

@MrBrymstond 5 жыл бұрын

I love carnage and chaos and the smell of meltdowns in the morning.

@MrPDawes 5 жыл бұрын

Capacity is strongly linked to the charge voltage accuracy. If it doesn't reach optimum voltage then it won't fully charge the battery. I would check the battery voltage during charge to see what it goes up to. They should all be using sub 1% tolerance voltage references. I'd test the batteries on a separate charge circuit which you use for capacity comparison tests.

@Furiends 5 жыл бұрын

We always want the disco version with Clive ;3

@hawkercnc8261 4 жыл бұрын

I asked my electronics guru friend how to get a ultrasonically welded plastic case apart. He took the case from me put it on the concrete garage floor and hit it twice with a four pound dead blow hammer and it came apart exactly along the seem. Perhaps you should try using a dead blow hammer which are amazing and not very widely known about.

@nimbusapparels4332 5 жыл бұрын

Wow thanks for the video I was thinking abt buying this powerbank! Can you please check if the pass throught charging is working? and at what Amp it is? Thank You.

@thomasmcdougall8059 5 жыл бұрын

I've just been notified about this video just there seeing it's 3 days old now

@jaapatedijkstra 5 жыл бұрын

Guessing that's the patreon supporters getting it first.

@CragScrambler 5 жыл бұрын

I'm always amazed at just how popular MREs have become these last 20 years, I thought I was the only weirdo that bought them up until the last few years.

@TrondBrgeKrokli 5 жыл бұрын

Suggestion for easy identification of the USB lights: use some kind of colour filler/marker or easy paint symbolic of (or close to) the light you get from the LED, then put colour only in the low grooves.

@mkeelcab9851 3 жыл бұрын

"If your adult you'll like Jagermeister, well if you like Jagermeister" well spoken

@ferrumignis 5 жыл бұрын

I saw these in Sainsburys a while back but thought they were a bit pricey, but it's clearly much better quality than the usual cheapies. I'm looking for a high capacity power bank with a decent flashlight built in, but haven't found anything. I have one which is ~5 years old that has a Luxeon star sytle LED and lens assembly built in which makes it a properly useful flashlight that used to have very long runtime with the 6x 18650 cells in it. Sadly the cells have degraded to the point of uselessness (can only get about 50% charge on my phone), so have been looking for a replacement with no luck. Mostly they have just a little 5mm LED or nothing at all.

@joe5583 5 жыл бұрын

+bigclive the F1 and F2 are most likely ferrite beads taking the edge off somthing coming off that processor.

@ejlockpix 5 жыл бұрын

Hi Clive. Love the video, love the power bank, love the Jager, absolutely love the little pink USB charge lead; where oh where did you get that? F1 & F2 are probably ferrite bead type inductors on the data lines. Usually the ref des for those are FB but they probably didn't care all that much.

@bigclivedotcom 5 жыл бұрын

The pink charge lead is an upmarket one (£2) from Poundland with a higher current rating than normal.

@kimvibk9242 5 жыл бұрын

'Indestructo-spudger' - Big Clive, enriching the English Language since forever...!

@AjdamusMagnus 5 жыл бұрын

Thx a lot. Im not electritian but I enjoy your content (for sure will sond some cookie money). I was inspired by this video and tore our powerbank (work for Varta) and found IP5318 - which seems also supports Quick Charger etc. Very interesting. Too bad all datasheets are in chinesse;))

@squaller9254 5 жыл бұрын

“The spudger is changing shape” 😂😂😂

@PunakiviAddikti 5 жыл бұрын

Bigclive, brought to you by Jägermeister, jerky and disco LEDs!

@JAG9100 5 жыл бұрын

i have a couple of those F1L cells, theyre about 3337 mah using a litokala li-500 at .5 amp Discharge

@gsmith5357 5 жыл бұрын

Just was going to give you a heads up on getting a Chinese translation app to help but someone took the world out of my finger 😃 so I'll say thanks for the videos, they have peaked my interest in learning about computer hardware.

@gsmith5357 5 жыл бұрын

*Words out of my finger*

@teardowndan5364 5 жыл бұрын

Since the LED output is most likely just a FET to drive the lamp, the only power that should get used when nothing is connected is only the power needed to wake up the controller and charge/discharge the FET's gate to turn it on/off.

@Fifury161 5 жыл бұрын

2:58 ...and my load, test load - the fact that you corrected yourself made it more funny!

@badboy2kxxx 5 жыл бұрын

the items marked F1 and F2 are more then likely not fuses but SMD Ferrite Beads as there on the data pins to take out any interference.

@colinoverton8897 5 жыл бұрын

As always, an interesting video. This power bank doesn't seem to be that readily available online, I guess that's why you bought it from Sainsbury's. Do you feel this is a good value for money, small power bank?

@petehiggins33 5 жыл бұрын

You may notice that there are no rectifiers in the schematic, it must use three internal FETs as switches and synchronous rectifiers to form a Buck converter for charging and a boost converter for the 5V output. This is how it might achieve 97% efficiency although it still sounds very ambitious.

@bigclivedotcom 5 жыл бұрын

To be fair, it was a lot cooler than expected for the current involved.

@davidsuzukiispolpot 5 жыл бұрын

That is likely what is happening

@mikemondano3624 5 жыл бұрын

I prefer the power packs that open and allow your own battery choices. But I have no idea how well those charging circuits work or whether the stepped-down voltages are obtained efficiently. At least I don't need to either solder in a battery or throw them away when they fail.

@BenYarmis 5 жыл бұрын

Neat that the level LEDs are charlieplexed. Haven't really seen that elsewhere that I know of

@bigclivedotcom 5 жыл бұрын

It's a common technique in power bank control chips. If you shake one you can see the LEDs strobing.

@danielhorne6042 3 жыл бұрын

check out the goodmans 10,000mah power bank . i had it open and it appears to be one massive cell i think there available on ebay

@worldartsmidy2513 5 жыл бұрын

Les analyses des différents produits que vous réaliser sont intéressantes ,mais le plaisir de destruction est immense.

@bigclivedotcom 5 жыл бұрын

C'est toujours bien de démonter des choses.

@JoshuaBurgess 5 жыл бұрын

Would you be interesting in looking at a VOIP phone if we sent one in? I have a few Yealinks that did not come back on after a power outage. In total we lost about 30 phones, but the majority were taken back under warranty. The odd thing is, they continued to work until they were individually turned off. Once turned off they would not power back on.

@kevinsellsit5584 3 жыл бұрын

At 4:39 ...I never said "I want you to stab the battery." Nevertheless I'm in for the duration of the video and will watch attentively. P.S. I'm from the future and on this very day you posted a awesome DIY power-bank explosion video. You must wait until 3-14-2021 to enjoy it.

@TheSpotify95 5 жыл бұрын

In a way this is worth it just for the high current charge/discharge for other electronic projects, and the 3300mAh cells - as 18650 cells above 3000mAh are rather expensive. Those cells could be re-used in that "2 cell" (actually 4 cell) work style LED lamp if you don't have a use for them? As that would work nicely in there.

@dylanmilne6683 5 жыл бұрын

It's really pricey though. £24 on argos. I bought a "Bauhn" powerbank over a year ago from Aldi, it's 7800mah with two USB ports one standard at 1A the other for fast charging at 2.1 able to discharge both simultaneously too. The build quality is great, it has a torch, it has a 4 led battery read out, oh yes and it was £9.99.

@xjet 5 жыл бұрын

If you think it's glued or ultrasonically welded, giving a plastic case a really sharp whack with the handle of a bigish screwdriver often breaks the bond.

@GrantCarterBrown 5 жыл бұрын

I think you've missed in yoru calculations that the mAh value quoted is usually at the cell voltage, rather than at the boosted 5V for USB since the mAh of the cells is higher (at 3.2 to 4.2 volts) than the mah of the boosted 5V you get as output... using total energy in joules is a far better measure

@ElindorBG 3 жыл бұрын

this video gave me an idea... I have a Bluetooth speaker that doesn't want to charge, I have shorted it with a faulty cable, but everything else works fine, just the charging... I could scrap a double-cell battery similar to this one and use the circuit board to charge the batteries of the speaker ^^ it should work as long as the battery is 2S and its in series (because the batteryes of the speaker are in series. I think it matters)

@6F6G 5 жыл бұрын

Is monitoring the quiescent current the best way to check if that torch function had any effect? If it's just switching a port output from high to low with no load then nothing much will happen. Better to check the output pin voltage.

@rpavlik1 5 жыл бұрын

Did you see anything about "Qualcomm Quick charge" on the box or data sheet? It does some fancy negotiation for higher current (and voltage!) Which might explain why it's so... Calm about doing a mere 5v - and why it looks more exotic in design.

@bigclivedotcom 5 жыл бұрын

I don't think it has the quick charge feature.

@matthewellisor5835 5 жыл бұрын

Perhaps those two resistors make a voltage divider at the data lines to make some of the dedicated charging port controllers work at a particular charging scheme.

@bigclivedotcom 5 жыл бұрын

The data lines go to the chip via two fuses and the chip seems to deal with the charging output indication.

@matthewellisor5835 5 жыл бұрын

@@bigclivedotcom Ah, thanks! Also, thanks for all of this great material. I love learning and, as my mother said, there are no idiotic questions, just a lot of inquisitive idiots. Still not sure what she meant by that, maybe I should ask.

@pigrew 5 жыл бұрын

The controller IC internally modulates DP and DM to follow Apple, Samsung, and BC1.2 charging methods... As mentioned in the video, they are likely just fuses to prevent fires when bad things happen.

@josifvissarionovich5320 5 жыл бұрын

Does it have some quick charge capabilities? Data pins are used for communication about voltage in QC.

@pigrew 5 жыл бұрын

@@josifvissarionovich5320 No quick charge, it only outputs 5V. Many devices limit themselves to 500 mA unless they get a signal from the USB power supply that it can output a higher current. This is usually called "fast charging". The signal is provided over DP and DM (like is done by quick charge).

@RicassoST 3 жыл бұрын

I’m still surprised in how many devices (mostly Powerbanks and Battery-Paks though) these Cells are used. I’m fairly used to them as I use them for my e-Cig’s since years. But they actually quite expensive... well as long as you buy good ones

@mxslick50 5 жыл бұрын

Based on the board marking of "FB1" I think the component "JR" is a jumper encased in a ferrite bead.

@splitnanosecond 4 ай бұрын

Interesting. I noticed that the main inductor is named "L2". So maybe this ferrite bead is our first inductor.

@tommy97luu 5 жыл бұрын

Would be cool to solder an LED on to see if lighting function still worked, or if the chip was programmed to disable that feature

@berndeckenfels 4 жыл бұрын

Have you yet dissected powerbanks which accept or provider higher usb voltage for quick charge? Looks like this one does provide at least higher voltage when negotiated. But if there is no chip on the micro usb it won't be able to draw more. Would be nice to have an USB tester which can actually exercise QC.