Well, this is going to be such a treat because I Didn't realize how Battery Technology had Advanced And it turns out that this power bank has a capacity of no less than 9 million milliamp hour. And to put that into perspective, Um, if I just, uh, do some computations here, right? nine million uh milliamp hour times say 3.6 Volts for the Lithium cell inside gives it a staggering capacity of 32 megawatts. That's fantastic because if we divide that by the biggest battery available in a Tesla vehicle, it kind of suggests that you can use this parabank to power a Tesla a heavily used Tesla for over a year. and instead of having a big, huge, dangerous battery, you simply slip this into the glove compartment and plug it into USB Isn't that fantastic? Now, it's also worth mentioning that with that nine milliamp hour rating, um, it's supposed to charge at one amp.

Uh, one part of the listing says 1.5 amps. Not a bit says one amp. I tested it at 600 milliamps, it's charging out. This is tricky because if we've got the full nine milliampere capacity, seeing it, you know, imagine you've been running your Tesla for so long and it was way flat and you divide it by that 600 it's charging out I'm afraid it's going to take 15 000 hours to charge and if we divide that by 24 hours per day 625, it's going to take two years to charge.

That is so annoying. Fortunately, it's almost got a solar panel to help with the charging. Its output is rated one amp per well either 2 amps total or one amp per Port Let's put that to the test, shall we? So here is a little parameters parameter: I'll Zoom down there so you can see and if I plug in this little uh tester Here we can test its output capacity from a port which the ports will be worn in parallel. So as I wind it up.

Um, we go up to one amp and that's not bad. It's holding five volts at one amp. As we go to 1.5 amp, it starts to drop quite dramatically. It has actually dropped down to 4.4 volts.

Let's see if we can get the full two amps output. Oh no, it conked out Oh well. It's a small compromise for the fabulous capacity of this nine milliamp 9 million milliamp hour cell. The listing of shows wall-to-one solar panel sections: Uh, this.

this is skimpy. I'd Put this at about 50 milliamps output. So I don't even want to calculate what that's going to be. That's going to be decades before it's charged off the solar panel.

If you have one of these, do Not charge out in the sunshine. It's just this bizarre thing: If you put this out in enough sunshine to make a decent impact on your battery, it will overheat the battery and the case will split apart as the battery fails. That's worth mentioning. Anyway, now we've got that out the way.

Let's take it apart. So I'm seeing these little dimples here. I'm also seeing these little covers at the side. Let's say I get the spudger into the covers at the side because they look like they're detachable.

Are they trim? Or are they part the thing that holds it together? They're part of the thing that holds it together. Quite excited to see this radical cell. Obviously, it's not 9 million milliamp hour? That is just ridiculous. Are these little screw holes? Let's see if we can pop the plugs.

Oh, it's got a Compass by the way. just in case. Uh, because you know. Eat Your Heart Out Google Maps It does.

It's held together. Screw. That's nice. I Don't know why they added Compass I Suppose it's because you know when you're when you're away camping somewhere, it's quite handy to just know where North is.

You could use the GPS in your phone and charge in this massively high power capacity power bank. Or incidentally, it's got one nice thing. One nice thing. it.

uh, double click and it's got some nice decent lights. Okay, it's not so nice when you press the button again and it goes into SOS mode and then it goes into uh, strobing mode and then it goes back to static. Double click puts it out again. Let's take the screws out.

That's nice. It doesn't just clip together. Oh how this screw is going to come out? Hold on. What are they? I Think the cross head screws? it's not doing it with that hold on.

Where's my other uh driver? It's hiding somewhere here. Hold on there it is. Slight Avalanche of stuff on the side that's not even going to fit in. What about this one? This is going well.

Oh that'll do a Phillips bit in a screwdriver sent to me by Philip that's nice I Didn't really make that connection at first. This was a hand machined a screwdriver. It's very nice. very chunky and heavy.

I Would quite like it was nine milliamp hour but I wouldn't like to punch the battery. if it was 9 million milliamp hour. that would just be good to buy a house. If it was, it would just be a disaster.

Oh, the screws are all dropping out everywhere. That's quite good coming apart yet coming apart. Oh it is kind of coming apart. Oh things are popping off.

This little thing is falling off. That's good. I didn't like it anyway. I've just pushed a button.

Oh here we go Here we go. Is the silver panel actually connect? I Think it is because the LED lights up. that's you know a sure saying this solar panel is connected some of them, uh do fake the solar panels This is not come out easily. Is there something I've missed here? or is it glued in or something? Oh this.

uh this bit of trim has come off. That's a start. This is where it just bursts into flames. anyway.

Oh, is it stuck to the battery? It is stuck to the battery. Hold on. This calls for the magic isopropyl alcohol and not petrol as someone suggested. but they're equally as flammable so it doesn't really matter.

It was a valid suggestion. I Don't know, is this coming out well. Bits are falling off everywhere. This is a little more promising.

Hold on a bit more as a proper now. I'll squirt it in there. I'll just douse the thing with flammable liquid. It doesn't look a very big cell.

A very big cell. Oh, they've They've got a metal weight inside the bastards. Maybe that's the secret of this. Oh, that is so tight.

Oh, that's just terrible. Uh, right. Tell you what. I'm going to turn it on for a start.

Um, right. Let's get the circuit board out and I'll put this battery and test and see what the capacity is. I I Have a feeling it's going to fall short of nine million milliamp hour. I'll also weigh this bit of metal at one moment.

Please and resume. the reverse engineering is complete. The Lithium cell is still under test once I've tested its capacity. I'll put it in the description down below spoiler.

it's not 9 million milliamp hour. unfortunately. I made a terrible miscomputation with the Kink calculator and I was out by three decimal places. So sadly, this power bank will not actually run your top of the range Tesla for a year without charging.

It turns out that actual capacity equivalent of a 9 milliamp hour per bank would be 32 kilowatt hours. So it's actually a third of the capacity of the top of the range Tesla battery. Which kind of means that that's just like is that 27 million milliampere parabank you could make out of Tesla. It would be quite big, you couldn't really put it in your pocket.

Anyway, the I'll put a note about that down below as well that I was so wrong there. Yes, not to worry, these things happen just as well I don't work at NASA Anyway, here is the reverse engineering of the unit that is the back of the circuit board flipped to tally up with the front the circuit board here, and it breaks into three distinct sections. There is an Fm9610 power bank chip, and it's notable that it deviates from their specifications. Again, it's a rated internal current limiting for charging.

Lithium cell is 700 milliamps and I got about 600 milliamps or so so that tallys up with that. The output current is rated at one amp and not their 2 Amp and I was squeezing it quite hard when I got up to 1.5 amps. So it's a one amp power bank and that's between the two ports, so don't go plug in one amp devices into each one, otherwise it will be sad. The other things are interesting.

Note here are the simple: solar charger is just going via a diode with our LED and resistor. Um, to show that Well, there's a light and then there's a battery protection chip all in one like the Dw01 but actually all integrated into one chip with its mosfets and then the little microcontroller. The purpose of the microcontroller is to get double function out of this switch to control the LEDs via this A2shb mosfet and Uh also to send a signal over to that to it switch input to tell it to wake up and actually turn the sort of battery level indicator lights on. Let's bring in the Chromatic I've divided this into two sections.

This is almost a complete copy of the data sheet. Example schematic of the Uh: the power Bank chip. so as a USB in with a little decoupling capacitor and the USB out with its little capacitor, it's got the 3.3 micro Henry boost inductor for boosting the voltage from the Lithium cell up to 5 volts. The Lithium cell has that little protective chip which uses a resistor and capacitor usually a hundred ohms and 100 nanofarad to filter and get a nice stable voltage across the Lithium sound that signals down.

and this little protection chip down here will actually break the negative connection to the Lithium cell if the voltage goes below 2.5 or above 4.25 The solar panel charges that directly via an ordinary silicon diode and the solar cell also has its resistor 2K and an LED Just to say I am charging. Well, there is light in the vicinity. It means nothing really because it's such a tiny solar panel. Uh, Other than that, the other things about their note are: the four LEDs are multiplexed using two lines.

Two of them go to the zero volt rail and the other two are wired across it so that uh, by swapping the polarity, it can actually light individual. LEDs Technically speaking, that means if this one's positive and that goes negative to light, that Led it will also like that Led, But that's logical because they do tend to display a bar graph and that's how they've done it. Uh, The only thing really noticeable here is that the there's a switch input that would normally be the push button on a very ordinary power bank. and when you press that button, it's got double function.

There's a resistor in series because it does actually power out that pin as well. and when you press that button and it pulls it to the zero volt reel, it turns on the it. Well, it wakes a power bank up and it also turns on the light if you double click it or long press it. And when you turn on the light, it actually puts power out to actually power the LEDs directly.

but it also um, pulses them off briefly just to check the status of the button. But this is being used differently to allow it to actually do various effects with the LEDs and with that others as well. It uses an extra bit of circuitry. that's that side.

done. let's go to the other side. The other bit of the circuitry involves Mystery Chip. It has a little decoupling circuit for its power supply.

It's 10 ohms and I measured this in circuit. which means nothing really because you can't really measure capacitors easily in the circuit. It measured about five Megaforce. So let's just guess it's 4.7 microfiber with tolerance.

And there's the button that is signaling to the microcontroller so you can click it to actually wake the unit up or go into the various LED modes. If you click it once, it will actually pull this low and that's the signal over to the other. the power bank trip and that wakes the power bank up and also just displays the LED status of the Lithium cell. Um, However, if you double click this, it's only going to send one pulse out in there, but it will then actually go into the LED mode and it sends a drive out to this mosfet and A2shb.

Super common. and there are two 6.2 ohm resistors. Let me show you them in the circuit board. That's them there and there in parallel, going straight to the output here and the circuit board and output.

Where is that? Somewhere here? It's quite nice. It's got two generic Luxian style one watt or three watt. LEDs but it's a shame that it's not an aluminum core. PCB because it's driving both LEDs effectively with that resistance of about 3.1 ohm, it will be about 300 milliamps it's driving, which is a lot, which is equivalent to a one watt.

LED But that means each of the users just dissipating about half a watt, probably. and that's quite a lot just for the beer. LED It does a fairly large copper tracks in this, but it's not the same as an on an aluminum substrate. PCB However, that's what happens.

The Gate of the mosfet is normally appealed to the zero volt wheel with this fairly high value resistor and when it turns it on, it just brings the LEDs on and goes through its modes. Um, anything else worth mentioning about this? Nothing at all. That is it. It's just basically getting double function out of the switch by sending the pulse over to the battery unit or actually driving the LEDs directly in.

its uh, SOS and blind hole low and high mode lion hole. That's it. lying, the hole. But there we go.

So interesting. Am I going to put in a claim and say I am outraged I want my money back because it's not nine million milliamp hour? No, I'm not because I got what I deserve by buying this I knew thing well it wasn't going to be 9 million milliamp hour. And also I know the stock. Reply: when you do contact them about things like this is that's the perceived value of how much energy you're going to get if you recharge it repeatedly over its cycle over X thousand.

Cycles Uh, that would all go I've got to calculate that now one moment, please. Okay, that's a highly improbable 3600 charge cycles, which is not going to happen assuming it maintained fuel capacity which it wouldn't gradually get lower and lower and lower. I'm not sure what you you total milliamp hour capacity you'd get uh with if you took into the compensation reducing value. but that is it.

It's uh, it's it's fake. but it was quite fun to take apart. And other than the completely pointless wheat which weighs 71 grams, um, what's that? What's that in ounces? All right, You work that out yourself. but it's probably about three ounces I'd guess um, but such a shame that they didn't just put a bigger cell in here because uh, it could have been quite a useful power bank.

It's quite nice that this protective flap clicks over. It's got the bright LEDs It could have been good, but they could have stuffed a bigger cell in here, but then that would have broken their little accountant's heart, wouldn't it? Other than that, uh, quite a fun thing to take to bits.