This was posted 8 months 3 days ago, and might be an out-dated deal.

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Xiaomi Zmi No.20 210W 25000mAh USB PD Power Bank QB826G $139.99 Delivered @ Mostly Melbourne via Amazon AU

520
Xiaomi Zmi No.20 210W 25000mAh USB PD Power Bank QB826G $139.99 Delivered @ Mostly Melbourne via Amazon AUAffiliate
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LWillim on 19/04/2024 - 13:44 amazon.com.au (1530 clicks)
This post contains affiliate links. OzBargain might earn commissions when you click through and make purchases. Please see this page for more information.

$30 off Checkbox Coupon on product page
Power bank approved by SmoothCactus

Product Description:
Capable of 100W USB PD output over the first USB-C port. Charges high-powered workhorse laptops like the 16 inch MacBook Pro. Also capable of outputting 45W from the second USB-C port and 65W from the USB-A port at the same time for a combined maximum output of 210W.
25000 mAh battery capacity can charge a 13 inch MacBook Pro 1.3 times. But still under the battery size limit imposed by the FAA, so you can bring it on the plane in carry-on luggage and use it during flights.
Built with five 21700 high-quality power cells for better capacity/energy density and greater charge-discharge performance than traditional 18650 battery cells. Comes with temperature, overcurrent, overvoltage, and short circuit protection.
Supports pass-through charging and UPS
Awarding winning industrial design: Red Dot Winner 2021

Price History at C CamelCamelCamel.
Electrical & Electronics 25000mAh Power Bank Xiaomi

Related Stores

Amazon AU
Amazon AU
Marketplace
Mostly Melbourne
Mostly Melbourne

closed Comments

  • AircraftFreight on 19/04/2024 - 13:49
    +4

    I was going to buy another one until I realised about the 3 about to arrive from China haha

    • CodeXD on 19/04/2024 - 13:52
      +1

      3? That's like 4 not enough.

      • AircraftFreight on 19/04/2024 - 13:54

        I already have two, I did read somewhere that ZMI was ending production, I emailed Mostly Melbourne a few days ago and they said they have no signs of it happening

    • [Deactivated] on 19/04/2024 - 16:19

      how much did you pay for them?

      • AircraftFreight on 19/04/2024 - 17:52

        I own two at the moment
        1st - $139.99 from Amazon (Lives in my office)
        2nd - $139.99 from Amazon
        3rd - $108.29 from AliExpress
        4th/5th - $117.46 from AliExpress

        • Shroomlet on 19/04/2024 - 19:30

          Could… Could I buy one off you?

          • AircraftFreight on 19/04/2024 - 20:11
            +1

            @Shroomlet: The last two are going to remain sealed unless if I find a use case, im not interested in selling them atm

            • Shroomlet on 19/04/2024 - 20:12
              +1

              @AircraftFreight: More than fair : )

            • Yogi555 on 19/04/2024 - 20:33

              @AircraftFreight: I have purchased a backup as well from AliExpress.

              Is it better to keep it sealed or is it better to open the package and charge and discharge it like once in 3 months to maintain battery life for longer.

              • AircraftFreight on 19/04/2024 - 20:34

                @Yogi555: I honestly have zero clue

                • Yogi555 on 19/04/2024 - 20:43

                  @AircraftFreight: Me too 😀 Have other INIU powerbanks as well still sealed but not sure if battery life degrades if it's sealed for many months / years.

                • Prong on 19/04/2024 - 20:44
                  +1

                  @AircraftFreight: @Yogi555 For long term storage, ideally you want to keep the power bank between about 40% to 60% capacity - around 50% is ideal.

                  Self discharge is quite slow, so if it was say at 55% capacity, just check it every few months and top it up slightly

                  • Yogi555 on 19/04/2024 - 20:49

                    @Prong: Thank you !!! Is it better to use it once in a while like once in 2 months or just leaving it untouched will still be fine ?

          • n3ck3ntry8bort0rgasm on 19/04/2024 - 21:35

            @Shroomlet: is it that urgent? why not just wait around for a deal on Aliexpress since its a better deal than this deal.

            also meanwhile heres a trick depends on the seller honestly but log in, add item to cart. wait a few minutes, come back. remove item from cart. log out. in a few days seller should attach a coupon just for you with major discount (30% if your lucky). I find this only works with certain sellers and items usually over $100.

            • Shroomlet on 20/04/2024 - 19:25

              @n3ck3ntry8bort0rgasm: Oh god no.. Just frustrated because I feel like I've had this alert on forever and never seem to pick it up!

              Thanks for the tip though!

  • anonym on 19/04/2024 - 13:55

    Grab these while you can, they always sell out quick.

    • giventofly on 19/04/2024 - 18:47

      I know. This is like the 3rd time I’ve missed out 🫠

      • MonkDog on 20/04/2024 - 12:53

        Fourth time lucky then!

  • ChatCPT on 19/04/2024 - 13:57

    But it was $83 last month
    How is this a deal?

    • AircraftFreight on 19/04/2024 - 13:58
      +2

      $83 + $18 Shipping + GST, at the lowest it was $109 from China with inferior warranty and support in comparison to this

      • ChatCPT on 19/04/2024 - 14:28

        my bad - i should have looked more closely

    • anonym on 19/04/2024 - 13:58

      Local warranty & peace of mind with Amazon returns

  • AirJordan23 on 19/04/2024 - 13:58

    Is this better than the Anker 737?

  • HelpfulMilk on 19/04/2024 - 14:05

    Airplane approved or nah?

  • Apostle0748 on 19/04/2024 - 14:14

    Good powerbank - got mine from the last deal on this that I posted.

    Don't think, buy before it goes… It will go fast.

    I was tempted to buy another, but really holding myself from doing so (have enough powerbanks already).

  • BEZ2311 on 19/04/2024 - 14:20
    +1

    This or iniu 100w which is less than half the price

  • CocaKoala on 19/04/2024 - 14:24

    This doesn't seem to have PPS. Could someone please confirm?

    • OZcheepsk8 on 19/04/2024 - 15:38

      my s24U is on superfast charging - so I'd say PPS is there

    • Prong on 19/04/2024 - 20:52
      +2

      Yes it does have PPS. (Confirmed on mine with a ChargerLab POWER-Z KM003C)

      C1 does 5V - 11V 3A, 5V - 20V 3A.
      C2 does 5V - 11V 3A, 5V - 20V 2.25A.

      So for example it should do Samsung 25W PPS fast charging. But won't do Samsung 45W fast charging, which needs 4.5A.

      • OZcheepsk8 on 22/04/2024 - 11:48

        are you sure it doesn't do 45W fast charging? I'm getting Super fast charging on mine which I only get when charger is 45W+. Power Bank specs says C1 is 5A 20V

        • Prong on 22/04/2024 - 14:46
          +2

          My understanding is Samsung calls both 25W PPS charging and 45W PPS charging "Super Fast Charging", but 45W is technically "Super Fast Charging 2.0".

          I am not sure how or if it displays the difference. I have seen comments online about a notification for "Super Fast Charging 2.0" with a compatible 45W PPS charger, but don't have a Samsung device to test myself.

          Based on the Samsung 25W and 45W chargers, Samsung Super Fast Charging is rated at 11V, so needs 2.25A to reach 25W (technically 24.75W). Samsung Super Fast Charging 2.0 is also rated at 11V, and needs 4.05A to reach 45W (technically 44.55W).

          So the ZMI No.20 with PPS 5V - 11V 3A will do "Super Fast Charging" (up to 25W PPS) but not "Super Fast Charging 2.0" (up to 45W PPS). As a comparison, the Anker 737 can do 5V - 11V 5A PPS, which is enough for 45W "Super Fast Charging 2.0".

          It's more complex than that because the phone uses around 8.5V to 9.5V from the charger. This ChargerLab video compares the actual charge rate various chargers get.

          Of course 25W vs 45W does not matter much, because the overall time period to charge is not much faster for 45W "Super Fast Charging 2.0" compared to 25W "Super Fast Charging", as the charge speed is up to 45W, but only peaks at 45W for a short time period. The overall charge rate is limited by battery temp.

          Oh and the 20V, 5A (100W) ZMI No.20 output is PD spec, but not PPS. PPS (programmable Power Supply) means the charger provides the exact voltage and current the phone asks for, which can make charging a lot more efficient, and thus generate less heat and charge at a higher rate for longer.

          With PD spec (EG, 20V, 5A,) the power bank (or charger) just supplies that exact voltage, and the device being charged converts that voltage to the voltage it needs, and manages the current limiting up to the maximum available. Using PD spec, most phones do 9V, 2A - so 18W charging, which is typically called "fast charging".

          • OZcheepsk8 on 22/04/2024 - 15:52

            @Prong: very interesting - thank you, charging is a lot more nuanced than I had expected.

            Edit: I can confirm you are correct, my phone does not do super fast charging 2.0 using the Samsung USB cable to C1. All this time I was marveling at how fast I charged at a measly 25W

            • Prong on 22/04/2024 - 17:25
              +1

              @OZcheepsk8: Yeah, and the manufacturers are often terrible at supplying information about exactly how their implementation of charging operates.

              I spotted a power bank compatibility test for Samsung S24 Ultra charging.

              https://www.chongdiantou.com/archives/322055.html

              Interestingly the Anker 737 I mention in my previous comment, which does 5A PPS, does not actually charge the S24 Ultra at 45W. It only manages 22.26W, so is only doing up to 25W Super Fast Charging.

              They also have the ZMI No.20, which also confirms it doing 25W Super Fast Charging.

              • OZcheepsk8 on 22/04/2024 - 18:36

                @Prong: amazing great info - thank you. So no powerbank tested is capable of SFC 2.0?

                Also all I'm hearing is I should be buying this powerbank instead
                https://vi.aliexpress.com/item/1005006132215500.html?gateway…

                Interesting this is the same company… https://www.ozbargain.com.au/node/815685

                • Prong on 27/04/2024 - 14:14

                  @OZcheepsk8: Sorry I had missed this.

                  And yeah, that testing shows the Cuktek model is the only one that does SFC 2.0. Cuktek is an interesting company and make great power banks. Sadly not sold in Aus yet. Cuktek is an OEM making chargers and power banks for other companies (including ZMI) and merged with ZMI. So pretty much the best power banks out there, and they spend a lot on R&D, so they tend to be cutting edge.

                  The Anker 737 should do SFC 2.0, so I am not sure why it doesn't. chongdiantou.com does great testing, but USB PD can be cranky at times and refuse to connect in certain modes in certain circumstances.

                  I have found that when my ChargerLab KM003C (same as used in that test) is connected inline between a power bank and device, it sometimes causes it to select a different charge mode.

                  But other comments online seem to support the fact that the Anker 737 does not do SFC 2.0, despite being technically able to. Hard to know why. It seems like later Anker models will do it, which suggests it's a communications problem or the Samsung phone is pickier about the PPS profiles than we think. Or might restrict it to certified devices.

  • ChatCPT on 19/04/2024 - 14:32
    -2

    but you can buy 10x 10000 mah powerbanks that are regularly on sale here for this

    • andresampras on 19/04/2024 - 14:34

      you jest….right?

    • Vita85 on 19/04/2024 - 14:45
      +1

      I just went with a Phillips 20,000mah for $29 on ebay. This Xiaomi isn't worth 4.5x the price for my usage case

      • SmoothCactus on 20/04/2024 - 08:47
        -1

        10 of those still wouldnt be able to output 200 watts sustained…

    • JXXY1337 on 19/04/2024 - 14:48

      but you need higher wattage for devices like laptops

  • seamonkey on 19/04/2024 - 14:34

    It's not often you can say when at home you reach for the power bank over a high speed wall charger, not for portability reasons but because this banger charges your devices so fast it seems like witchcraft. We have 2.

    • ChatCPT on 19/04/2024 - 14:37

      but theres lots of 100w fast powerbanks much cheaper - why is this so much better? aside from the 210w simultaneous charge

      • seamonkey on 19/04/2024 - 14:42
        +1

        Because I'm not a tech head I may not be able to answer. The build is better than anything else I've seen. Cables it comes with seem to be best quality I've seen.. This house has like 100 power banks. All others are dramatically inferior to this. They charge slow, or the LED display glitches, Without a tech explanation I'll say it's clearly case of you get what you pay for. It's temperature as cool as a cucumber all the other power banks I've seen just seem to charge up hot. This is clearly well insulated with great heat dissipation.

      • siggy213 on 19/04/2024 - 15:07

        There is alot more to it.

        Many manufacturers boast 100watt but when it’s tested in the real world thats not the case.

        Build quality.

        Even the internal 18650 cells. Many use cheap ones where MI are known to use quality ones like Samsung or LG.

        • n3ck3ntry8bort0rgasm on 19/04/2024 - 15:51

          Many manufacturers boast 100watt but when it’s tested in the real world thats not the case.

          powerbank brands seem to put 100w in the specs when it can only do that for 10 mins before it overheats and shuts off. pretty standard for everything decently priced, which is probably why this xiaomi is so popular even though very expensive.

          Even the internal 18650 cells. Many use cheap ones where MI are known to use quality ones like Samsung or LG.

          Xiaomi no.20 uses 21700 cells I think.

        • gyrex on 20/04/2024 - 07:26
          +1

          Alot is happy

      • Prong on 19/04/2024 - 21:18

        It is worth noting the 210W charge is including 100W from the USB-A port with a special included cable. It's not PD spec, and I have not seen what protocol is needed to use it. My best guess is Huawei fast charge (which uses USB-A to C), but my testers don't show it supporting 100W. Probably it's just not communicating properly.

        For normal use you can do 100W from USB-C 1, and 45W from USB-C at the same time. And 18W from the USB-A port using QC3.0.

        It's popular because it uses quality Samsung 21700 cells, is well built, has a nice form factor for a bag and runs cool enough to be left in a laptop bag while charging. Other handy features are pass through mode, and importantly, UPS functionality (quite rare). The USB-C ports don't share power, so swapping devices on one doesn't cause the other to renegotiate. There are also loads of teardowns and other tests confirming the quality.

        • AwesomeAndrew on 20/04/2024 - 19:16

          The USB A port on the powerbank will do 100W USB PD (20V 5A) if you use the included special cable. It will do 120W PPS (5-21V 6A) if you have a special device which uses the proprietary protocol.

          • Prong on 21/04/2024 - 00:19

            @AwesomeAndrew: Yeah I was wrong about the PD. (There was some more discussion further down but I forgot to update this comment)

            Interestingly, when I got the power bank none of the testers I have could read it as PD spec, or trigger any PDOs.

            I made the mistake of assuming that meant the USB-A output via the ZMI cable was not PD spec, and didn't actually plug it into a device that uses PD charging!

            Having done so now, I see PD devices and various simple PD triggers have no issues triggering any of the PDOs. My Power-Z KM003C has had a firmware update or two since I initially tested, and it can definitely now detect and trigger PD on the ZMI USB-A to C cable. Though when connected inline between the power bank and a device, the KM003C can't always identify the protocol.

            I am curious if you know more about how the PD negotiation is handled by the power bank + USB-A to C cable?

            IIRC I believe the QB826 (Chinese) version of the No.20 does the 120W charging (for some Xiaomi phones) but the QB826G international version Mostly Melbourne sells does not.

            • AwesomeAndrew on 21/04/2024 - 19:12

              @Prong: The QB826G also does 120W charging if you have the special trigger board which supports the proprietary protocol, I have tried it. The ZY1280 usb tester and the ZYPDE trigger board support the proprietary protocol.

              I know the PD signal seems to travel through the extra pin inside the USB A end of the cable, the location of the pin seems to match up with the additional GND pin from USB 3.0. Unfortunately I don't know anything about the proprietary protocol which allows the 120W PPS.

              • Prong on 22/04/2024 - 17:18

                @AwesomeAndrew: Ahhhh, very useful info, thanks!

                I had been looking for an excuse to buy more USB testers and triggers to add to my unnecessarily large collection :D

  • ChatCPT on 19/04/2024 - 14:39
    +3

    ok fine went through all your comments on ozb from previous deals - bought

    thanks OP

    • seamonkey on 19/04/2024 - 14:46
      +1

      You aren't going to regret it. Won't be landfill in a couple of years. Let us know how you go be interesting to hear. Also if you're a traveler it's great because it feels like no other power bank will come close in terms of what it offers during your flight. The fact that it's at the maximum (below just) of what the Airlines allow you take on gives your flight entertainmeny the best sporting chance for those long hauls and the endless airport waits.

      • ChatCPT on 19/04/2024 - 15:24

        thanks for the detailed response mate! will do

        Ive got a few little powerbanks but my fav is actually another xiaomi 10,000mah one from 2016! still works well holds charge and built solid. So you're right these guys know how to make powerbanks

        only reason I don't like it is USB A that's all

        • Yogi555 on 19/04/2024 - 15:29

          Good part with this Powerbank is it can actually charge my laptop with USB-A port as well ( only with cable provided with the package though )

          • Prong on 19/04/2024 - 21:21

            @Yogi555: Interesting. What laptop is that?

            I tested the output from the USB-A port with the included cable, but it didn't show PD spec.

            But I didn't actually plug it into my laptop and see what happens.

            • Yogi555 on 19/04/2024 - 21:31

              @Prong: Dell Inspiron 13 7000 series. Guess it's only taking around 30w , buy i am happy as this is the only Powerbank where USB-A port was able to charge it.

              • Prong on 19/04/2024 - 21:34
                +1

                @Yogi555: Very interesting. I have a new USB protocol tester, so will have to find where I left my ZMI USB-A to USB-C cable and plug it into a laptop, and see if I can log what protocol is used.

                Thanks for the info!

  • andresampras on 19/04/2024 - 14:40

    So tempted. Then realised this thing is 3 years old.

    Probably due for update? Not sure how they'd improve it though

    • Apostle0748 on 19/04/2024 - 14:48
      +2

      Still the best, even after 3 years.

      When I was looking a while back and eventually posted a deal myself - it went quick.

      There is a reason why these deals sell out quicky, quality components and construction.

      • andresampras on 19/04/2024 - 15:02
        +2

        Bought, thanks to your severe FOMO-inducing arm-twist

        Has been this price many times though so nobody should every buy this product for >$139

  • HungryRussian on 19/04/2024 - 14:44

    Great if yoy do high intensity compute on the go, but perhaps overkill for many. I find 90w is more than enough for general development with multiple servers/ services running on my M1/2

  • running on empty on 19/04/2024 - 14:45

    Thanks OP, been waiting for this again..bought

  • johnkash on 19/04/2024 - 14:51

    Caved, FOMO’d and bought one, let’s hope this is good, already bought an Anker 737

  • Jayblesz on 19/04/2024 - 14:55

    Does it really weigh 580g as per product specs?

    • OZcheepsk8 on 19/04/2024 - 15:41
      +1

      I just weighed mines. 580g exactly

      • Jayblesz on 19/04/2024 - 21:33

        Oof
        Thanks!

  • markmeister92 on 19/04/2024 - 15:03

    im a fan. would definitely recommend

  • StrugglingToBargain on 19/04/2024 - 15:10

    I might be cooked but I don't see the $30 off checkbox

    • Willim on 19/04/2024 - 15:11
      +1

      Looks like deal is over

  • armageddeus on 19/04/2024 - 15:15
    +1

    Aaargh, missed out again ! Why did I go on a late lunch break.. ??

    • andresampras on 19/04/2024 - 16:06
      +2

      Let this be a lesson to you - Always eat lunch on time!

  • Kongzi on 19/04/2024 - 15:52

    Missed out

  • vodamerc on 19/04/2024 - 16:44
    +1

    I use this is a production environment quite simply because its better than a lot of 'professional' equipment. The fact I can plug/unplug any ports without others renegotiating is a game changer.

  • randomdude on 19/04/2024 - 18:47

    Top Tip from an owner of two of these:

    You can daisy chain the proprietary USB-A to USB-C (100W) between as many ZMI power banks that you have to create your own battery farm :)

    I personally run two of these as 24/7 UPS for a NUC and Modems, PoE switches and WiFi access points. USB-C PD to DC barrel cables work well!

    • n3ck3ntry8bort0rgasm on 19/04/2024 - 18:57
      +1

      yeah UPS function on powerbank is uncommon and underrated and is also why I think this is costs so much.

      I had an idea as well connect a solar panel with USB output and have a mini solar system to power USB devices. but overall initial cost was too high. will think about it again when prices go down more.

    • atlas on 19/04/2024 - 19:57

      Ah I will have to look into these plugs… thanks for the tip

    • anonym on 19/04/2024 - 21:02

      Weird, in my experience only the USB C ports on my ZMI have UPS capabilities. The USB A port on my ZMI will always get interrupted and renegotiate its output when I plug an input source into either one of the ZMI's USB C ports. Could you test yours and let me know if this is typical?

      • n3ck3ntry8bort0rgasm on 19/04/2024 - 21:33

        interesting. could also be handy for you and random to reveal if you have global model or china model. cant remember the differences I think only the china model can do 210w?? (or do I have it backwards)

        • anonym on 19/04/2024 - 21:56

          QB826G from Amazon AU

      • Prong on 19/04/2024 - 21:50

        What do you have plugged into the USB-A port? Is it using the ZMI USB-A to USB-C cable?

        With something in the USB-A port that uses 5V, or QC up to 12V, then testing just now, UPS works and the USB-A port does not renegotiate when the other ports are used.

        I need to find my original ZMI USB-A to USB-C cable, but when I first tested it I didn't find any supported protocols that let me trigger more than 12V from the USB-A port.

        • anonym on 19/04/2024 - 22:05

          I use ZMI's own proprietary 100W USB A to C cable plugged into a Dell computer (Optiplex 7090 Ultra) that requires a 90W or above power supply.

          The ideal scenario would be to have the 100W USB A port powering my Dell and a 100W input charging the USB C1 port of the ZMI. Unfortunately, the ZMI's USB A port would always get interrupted whenever I plug an input source into either the USB C1 or USB C2 port.

          So in order to get UPS performance I am forced to power my Dell using the 100W USB C1 port and then charge the ZMI using the 45W USB C2 port, which is fine as long as I don't run anything that drains too much power on my Dell computer. It's just not as ideal.

          Did some additional testing and found out that ZMI's USB A port will not get interrupted if it is charging something that requires less power, e.g. my mobile phone (9W).

          Would be interested to know if anyone else is able to test their ZMI on a similar setup.

          • Prong on 19/04/2024 - 22:17

            @anonym: Yeah ok very interesting.

            I can test it, but annoyingly I can't find my ZMI USB-A to USB-C cable.

            Does it have any identifiers on the cable, such as markings on body of the USB-A end? In my cable drawer, I have saved what appears to be every USB-A to USB-C cable ever made, and I am trying to figure which is the right one!

            I see (one of) my ZMI USB-C to USB-C cables has a white tag on it with a ZM logo and QR code. Does the USB-A cable have similar? (which would mean mine is not in my cable drawer…)

            • anonym on 19/04/2024 - 22:30

              @Prong: The one thing that irks me the most about ZMI's proprietary 100W USB A to C cable is that it has no discerning markings whatsoever. It looks as generic as any USB A to C charging cable can be.

              Good thing I had the foresight to scribble "ZMI" on mine with a sharpie. Here's a photo of my cable - hopefully it can help you identify yours. I measured it and it is approximately 1 meter long.

              • Prong on 19/04/2024 - 22:34

                @anonym: Excellent, thank you - that allowed me to find the right cable. I have labelled mine the same way now!

                I will run some tests now and report back.

                • Prong on 19/04/2024 - 22:56

                  @Prong: So, mine does renegotiate the 100W USB-A output when a 100W input is plugged in to either USB-C port.

                  I have some variable results from a USB-C to DC plug trigger module (20V) so will do more testing once my load tester has finished it's current test.

                  I still can't get any USB testers to tell me the protocol used on the USB-A to C cable, but it works fine with PD triggers, so must be PD in some way.

                  • anonym on 19/04/2024 - 23:00

                    @Prong: Cheers, I'm glad to know that my problem is typical on similar units. I was a little worried that my ZMI is defective in some way with everyone claiming that it is UPS-capable across all USB ports 😅

                    Not sure if this is going to help, but the original 90W Dell power supply (barrel jack) has a rated output of DC 19.5V & 4.62A.

  • Shroomlet on 19/04/2024 - 19:30

    GODDAMN! missed it again

  • King181 on 20/04/2024 - 12:14

    I have this power bank and it excellently expecially for the price. Fully agreee with what Catus said…

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