Teardown of Anker 140W PD3.1 Power Bank (737 Power Bank) 

I cannot wait till the EU mandate of replaceable batteries in consumer electronics. 2027 cannot come any earlier.

Our pleasure!

No problem 👍

Prepare to cry again: These go on sale for $100 occasionally

@@74862 isn’t that always the problem? You buy something and then a month later, it’s on. Big discount sale 🤣🤣🤣 dammit!!

@@chrisalexthomas How is it fairing 1 year later? Still good??

I got this one because it has a separate USB C that can output the full power but only output my phone will sometimes try to fight with a power bank that has a common in and out port where it sometimes the phone will try to charge the power bank but with the output only port I could charge my phone without it being able to fight back

why would u ever want to replace the cells?

@@bachoyaryarashvili2793 because they can go bad quite quickly while the really good electronics driving the powerbank would probably work for decades.

@@geraldh.8047 Yeah it's unfortunate.

I know, right? I wish I saw this before buying one myself, then I would've bought a shargeek storm 2. They're so much better repairability wise.

Thanks for pointing this out. Going for the Shargeek 2 now instead.

My pleasure!

Yes. I have another anker power bank using 21700 but they are lg

These are 21700 batteries

Not all chinese cells are bad. Anker is a reputable brand. I am pretty sure they are sourcing these 21700 cells from well known makers. The general bad 18650 cells are those ultra fire or similar named stupidly high capacity claimed cells..

These Lishen cells are pretty good quality, on par with Samsung 40T but expect a lot of 100/140W PD charging to really the life cycle count. Cells that are driven near their max will degrade much faster than standard 800-1200 cycle life. Check the datasheet to see if Lishen goes into detail or just gives one number

@@ericklein5097 Capacity ≥ 2,400mAh @300 cycles (60% of the standard capacity @ 25℃) - Charge: 6A, 4.20V, CCCV 100mA cut-off@ 25℃ - Discharge: 35A，2.5V cut-off @ 25℃(80℃ cut-off)

Yes, the lower board does all that. The cells must have balancing or they will eventually drift apart and give you less and less capacity as the charger stops working when the lowest cell hits a predetermined low voltage cutoff.

i have it and it charges my mac only for 2700-3000mah with 75w

If you wanna buy the tester in our video, you can visit our Amazon store: www.amazon.com/s?me=A31UM8SRXYVF2Z&marketplaceID=ATVPDKIKX0DER

there's working cables that can go up to 240w now

@@HearMeLearn like the one in the video, that clearly are a 240watt rated cable when its fitted with an Emarker claiming it can do 50v 5A 0:54 Its an 240 watt cable that come with this powerbank, but since its a 14w max product.. they just posted the same wattage on the cable, but its inner chip says its a 240watt cable., and it does feel like high wattage cable it as its annoying as f..from all the heavy amount of strains inside that makes it quite stiff... Just sted it on the Fnirsi FNB58 BT USB meter, it labels it also as a passive, 0-1m cable with a rating of 50v and 5A, so a max of 250watt. but its a short cable at around 60cm

Yes, it's less than 100wh

Thermal pads can conduct the heat and then, the heat will be dissipated faster.

😂

Sounds abotu right, mine had ports cutting out and power delivery going down when 2 devices were plughged in no matter the ports used. It also had issues withthe steam deck and would require a full reboot (by leaving it for 10 mins unused) to try and get the right wattage. but as soon as you plug a 20w phoen in the 38 watt charge went down to 22w... Was an absolutely awful product, I showed the videos of the poor performance and anker's response was this is normal function. I find the 140w number extremely misleading

There is "Continuous Discharge Rating (max): 35A / 45A with 80°C temperature cut" in the LR2170LA specs. It's strange that only 6A was announced in the video.

It's possible it can go beyond that 6A spec for short periods of time

Hi, I appreciate your message and the effort you've put into trying to fix your Anker 737 power bank. I'm glad to hear that you found my video helpful in your troubleshooting process. However, I must apologize because the display from the Anker 737 that I tore down in my video is no longer available. It was a part of a teardown done quite some time ago, and I don't have any spare components from that teardown. Best of luck with your power bank repair, and have a great day!

Yes

Everything has become disposable.

Yes

I‘m so sorry about that. You may contact Anker to get a refund or replacement.

@@ChargerLAB the battery was bad for eBay at a lower price price. It worked fine 3 charges. Anker doesn’t want to help me in this matter.

@@grusamgrid so you bought a known bad (defective) device? Why?

@@geraldh.8047 what I meant to say is “bought from eBay”

@@grusamgrid then you should complain at eBay and open a case. With eBay in case of conflict they tend to mostly side with the buyer. Should be no problem if it was bought recently (and since this is a very new device I would guess it was bought recently).

It's only used in production and assembly

@@ChargerLAB yes but inquisitive minds want to know what it actually does!

Can anyone help in finding a solution and repairing the power bank?

Yeah, I don't exactly get what they are doing here, there has to be more to it or you would have 4000mAh capacity. There has to be some type of switching going on.

mAh it's been a marketing measure unit for a long time. What do you care how they are connected inside if voltage that you get is regulated and more to it - not 3.7v for which mAh has been calculated...

@@neve_dimka Because I'm curious, because I work in the field and have a very expensive lab setup, because I enjoy it. That said, this is just a video I watched real quick.

@@pietromoopy2010 my comment was to Enelyson Fields. Anyway it answers your question too - mAh written on a box is for marketing reasons. The general public is accustomed to mAh, so manufacturers keep presenting their products this way.

@@neve_dimka Oh I agree it's a useless measurement.

@chargerlab

We won't recommend you to do this.

Ahhh Chargerlab meant 6A charge current

Checkout 'LAER'

So it can be discharged in about 20 minutes when powering a gaming laptop?

@@willng34 To be entirely fair, that's about a 50% extra battery life for something that has a nominal battery life of about 40 minutes, and that might just be enough to get someone through something. Granted, you can also swap the USB power bank out halfway without shutting the laptop down, like you used to be able to do with multiple laptop batteries in the good old days

25 minutes at Airplane maximum capacity

@@tsujimasen indeed, last time i check TSA still limit 100Wh (or 27000 mAh) for power banks

your device communicates with the charger and it would use only as much as it would need at the right voltage and amperage, so no boom

@@run00n0 - Cool! So I can plug my iPad Pro directly into a wall socket with no adapter. Thanks!

@@run00n0 Nonsense. There is no communication for that purpose. Clearly the basics of electricity are not understood. I shall explain. When a power source specifies a watt figure, this is the maximum power that can be drawn from the power supply. It does NOT mean that the power source will always deliver 140 watts regardless of what you connect to it. For voltage sources, which this is (as opposed to a current source), a set voltage is output. Now, the load, the thing the power source is connected to, will draw current and how much current is drawn is entirely up to the load (within limits which are set by the power source). So the the power drawn is a combination of the voltage and current (P=V.I), therefore as the load or different loads draw different amounts of current, the power drawn from the source also changes. So if you connect a 140W charger to a 40W IPad, then as long as the power supply has the correct voltage for the IPad, then there is no problem, the IPad will draw the amount of current it needs, and the power source -the battery - can deliver it (because the requirement of 40W is less than the maximum power of 140W the power source can deliver). No need for any communication between battery and IPad. Now, USB-C supports multiple voltages, unlike earlier versions of USB which are all fixed at 5 volts, so there is a danger that too high a voltage could be delivered to the load, to the device being charged, and that is then where communication comes in, to ensure that the correct charging voltage is used.

@@deang5622 Are you new to this? There is an entire communication protocol set up for Sources and Sinks to negotiate a voltage. Source: Hi I can do X Y and Z Sink: Hi I can accept X and Y so I will take Y Source: Sending Y