The last powerbank you'll ever need! Maxoak K2
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- เผยแพร่เมื่อ 10 ก.พ. 2025
- The Maxoak K2 Powerbank is a genuine 50,000 mAh powerbank that can recharge your phone, tablet and even your laptop! It's truly the last powerbank you'll ever need to buy.
Amazon US: www.amazon.com...
Amazon UK: www.amazon.co....
10% Discount on Amazon US using code L2NL8VTZ ( 03/07/2017 - 04/30/2017)
Aside from the 4 USB ports for charging phones and tablets, it also includes a 20V DC jack output with multiple connectors for charging laptops. Also there's a 12V output which can be used for monitors, TVs, projectors and other 12V equipment.
I discharged the powerbank with a 5V ~1A load which ran for 31 hours and consumed a total of 168.5 Wh. The load was actually a little higher than 1A but I rounded it down for simplicity.
168.5Wh is within 10% of the expected 185Wh which makes this a genuine 50,000 mAh powerbank.
At 2.77lb or 1.25KG, you're going to feel it in your backpack, but that's the price you pay for such a high capacity!
The Maxoak powerbank includes a 16.8V 2.5A charger which can fill the powerbank from 0 to 100% in 6-8 hours.
Although the laptop DC output is labelled as 20V, under load it could go as low as 19V. The reality is that most laptops can actually accept slightly higher and slightly lower voltages because of onboard regulators. But of course you take your own risk if you go outside of the specs for your laptop.
The over current protection on the 20V output will kick in at 4.5A.
The over current protection on the 12V output will kick in at 3.5A.
I recommend checking their Amazon listings to see if your laptop is officially supported because they're constantly providing updated information and occasionally update the included connectors.
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I've had this powerbank for quite a few years and it's definitely pretty amazing.
How often do you charge your power bank? I've had it for about 4 months and used it twice.🤔
That's not a power bank...it's a power plant!
It's a power tree !
"power tree" this analogy does not make sense.
plant small, tree big.
@@Choice777 😁
@@Choice777 😂😂😂😂😂😂😂😂😂
I've bought it based on your review and the high rating on Amazon and it turned out to be AMAZING. My laptop battery will only last for 1.5 hours but now I can add 7 hours on top. Charging time from 0% to 100% is about 4 hours which is great, but charging light indicator on the power brick doesn't change color. Doesn't support quick charge technology for smart phones, and its a bit hefty. Btw remember that civil flying regulations doesn't allow this size of power bank to get not with your carry-on neither with the luggage.
What size do they allow then?
you are correct about not taking the power bank on a plane. I just read horror messages posted on Amazons site for this powerbank. Passengers who tried to smuggle the units on the plane had their units confiscated. This occurred around the world. Unfortunately the maximum capacity agreed among the world's airports is 100 watthours, so that makes it difficult to take this powerbank on holiday with you. Placing it in checked luggage is also not an option :( Thanks for your detailed review, I am going to purchase a unit for emergency use.
Thanks for the great work you put into this review, I'm an engineer and that's the right information I wanted to find about this product before I buy it. Keep up the good work and good luck with your channel. Greetings from Romania!
REPAIR TIP: I love the battery but like all modern electronics the weak point are the mechanical connectors. I recently struggled to replace the charging connector because there are no disassembly diagrams or instructions online. Taking it apart is easy:
(1) Although you could just use a sharp knife to wedge under and then pop off the grey plastic end caps, I found it a little easier to first
(2) use a sharp knife to remove the two black adhesive bars on the sides of the battery
(3) then remove the six (6) screws, 3 on each side, which normally are hidden by the adhesive tape bars.
(4) then pop off the grey end cap(s). The electronics will be loose after removing the screws so you can slide out the ic board to re-solder any components that came loose or need to be replaced. Obviously, if the charging connector goes bad, and mine did after a couple years, the battery is just a brick.
Looks like a good power bank! I have been waiting for a real beast like that.
Happy that the channel is growing and is getting sent products for review!
Thanks, me too. It certainly beats shelling out my own cash!
Thank you for this comprehensive, balanced and well-presented review!
you are talking about electricity and conversion which i deemed necessary but dangerous, however, you talk so smoothly and it's making me comfortable to learn more about electricity.
whatever may be the product, the reviewing is too good to see. thank you very much
It'll be interesting to open it up and see what cells are used inside haha!
I most certainly brought exactly that powerbank onto an airplane. The TSA did not flag it or ask me questions about it. I'm not sure whether or not they *should* have allowed me on the plane with it, but I made it into Canada and back with it.
thanks for the great review. Really enjoyed your honest & down to earth style. liked & subbed!
As you said in your intro, some powerbanks claim '50,000 mAh', but this is a fake to get you to buy!
The bank you reviewed is the real deal!
Been a subscriber since your early days. I can always feel your enthusiasm towards your gadgets when you review them. Good job! :)
:D Thanks to loyal subs like you that help my channel grow :)
no, thanks to you sir, learned a lot, saved some bucks, and was able to protect myself from bogus products. GBu always
This is more than a Power Bank ! A laptop, Smartphone and anything else power supply device while on the go ( other than on airplanes max 100W ). @GadgetAddict, this is a well explained review 👍🏽
You are a great reviewer. It's pleasing to watch.
The only thing missing is the ability to jump start cars with it. Looks pretty cool.
That line-up of the different connectors is the bane of my existence. You buy these universal chargers, then lose those adaptors. And they are never interchangeable with other universal chargers
I've heard that this doesn't have a USB type C connector which would make it useless for newer laptops. Any opinions on this?
That is a very good and informative review, thanks! I will purchase it once I find it in my country, since it doesn't ship. As you said because of the high capacity..
Gonna have to find a workaround
Thanks for your video, I'm French and I've understood everything ! You convince me to buy this one !
135 US dollars. It's not cheap, but I was expecting about 2 times that price. So it's not so bad considering all the power it stores.
I wish I had one of those last week. We lost power for 36 hours after a snow storm...
+MusicalBox agreed, it's not cheap but it's also not overpriced. It's just the reality of having so many battery cells inside. 36 hours without power? That sucks! This powerbank certainly would have made your life a little easier.
This one is legit. It's so huge and heavy, and that's how real powerbank would look like!!
Thanks a lot man. I just picked up two!
The reason that the wattage is slightly different is because the electronics have to convert the 3.7 volts into 5 volts. This will change the mAh that is outputs. At 5 volts output, it will output power at 37,000 mAh @ 175 Watts, which is pretty spot on what you tested. @ 12 volts, the total output is 8,880 mAh @ 106 Watts. But at $150 a pop, no thanks.
Great review,
Could you please make a review of the Maxoak K3. I travel a lot and I need to carry the power bank on planes with me. I know from reviews on Amazon that some people took it without problems and some got it confiscated.
The manufacturer of the power bank states that it has a voltage of 3.7 V
If we take that in the equation (Wh = A x V) we have:
Wh = 36A x 3.7V = 133.2 Wh , which should be allowed on carry on baggage on a plane with the airline consent. According to the IATA and ICAO the limit is 160 Wh. Unfortunately, the 133.2 Wh isn’t printed on the power bank and it isn’t shown either on the manual, which makes it very difficult to prove it. I sent few emails to the manufacturer to get an official brochure or specification letter detailing this, I’m still waiting.
Moreover, some airports consider the mAh as their measurement and they put a limit up to 32,000 mAh because they take a standard of 5V output.
I don’t have the equipment you have to really do the test, it would be very helpful if you can make a full review on the Maxoak K3, 36,000 mAh
Thanks,
Lisandro
Anecdote, me buying a universal laptop charger in cdrking.
I go there with my broken power adaptor and ask for one of their universal chargers. Instead of giving me one, they give me this long sermon about the danger of using a universal charger which they haven't confirmed compatible with your laptop. At this point, I am taken aback. I literally brought my charger with all the necessary specifications printed on it.
Imagine this, they wanted to make sure that the polarity isn't reversed.
Ignore the fact that virtually every laptop and charger uses the same center positive polarity. I had the original charger with me which had it printed on it.
Some other customer had to educate the sales lady on that while I stood there dumbfounded.
what is the power inverter you were using?
If you had a AC inverter and a really good cooling system in a power bank like that and it could output up to ten amps at 120 volts then it could also work as a UPS for your computers! It might also need twice the capacity for such an application! :)
test this with a roouter see how long it last :) this be good for if power go out to keep wifi on
We know this powerbank has around 168 Wh so if we consider most ISP supplied routers consume 2.5 - 5 Watts, this powerbank would run the router for 33 - 66 hours :D
those some good numbers :)
still love see real word test tho :)
+thesmashtvnetwork Ahhhh.. any good UPS will run your home wifi for at least 2 hrs during an infamous brown out..
@@alegriart how?
Great review. Can you tell me where I can buy your power monitor. The portapow one. Thanks.
Nice review, the best one ive seen yet. Not much people actually test it.
I know it would take a while to use a solar panel to charge it, but I would like to know if it did work with : Anker PowerPort Solar 21W 2 Ports USB and how you could actually charge it with a USB out solar device..?
The question is for a base camp setup. So another question is how it would do at 0-10°C ? For that you would put it in the fridge. Not to damage it but to simulate a high mountain hike.
Thanks would appreciate the reapply or personal message.
Thumbs up!
Thank you for the great and comprehensive review. I have a Lenovo laptop that has a USB C power connection. Do you know of any suggestions for connectors that will work with this power bank?
The M5 Imoto is nicer and I got it In Feb 2018 for $129 on Amazon. Lasts a year unplugged and even offers 100 watt AC power adapter. So far so good.
Thanks for your introduction of Maxoak K2 Powerbank. I bought one from Amazon yesterday. Not able to connect it to my Dell Inspiron or HP Elitebook laptops. Message I got "Your system will operate slower and battery will not charge. The problem might by solved by: Ensure the plug is inserted completely for best system operation or Connect a Dell 45W AC adapter or higher". Reason to buy this is mostly for these 2 laptops, one for work and one for personal usage What do you recommend me to do?
Great review for a great product! Would like to know if it can be charged with a 100 watt portable solar panel? This would be a truly portable power bank.
Yet another informative great video from Gadget Addict! Keep it up! One question though, is the power supply charger multi voltage or just 110v?
How often do you charge your power bank? I've had it for about 4 months and used it twice.🤔
Hope I'm not too late replying to this but found it really interesting. I want to power my Atem Mini Pro which apparently requires a 9-20v 30w supply according to the plate on the back of the unit. However the mains power plug says the output is 3v 36w. I would ideally like to use the 20v socket on the Maxoak and save the 12v output for a monitor but not sure if this is advised. I'd love to hear your thought on that. Thank
How do you make the dc 12v to cig lighter? Do you just cut em and put em together?
Great review ... is there any powerbank that can chg an old style laptop SIMILAR to this that is 100Wh only? And still has all of the connectors in it?
So will this run a 1500 watt space heater all night? I'm trying to stay warm in a van.
I noticed in the documentation for this one, it shows the 20V output for DC2. My Laptop is 19V, so I'm guessing it won't work? Couldn't find the compatibility sheet. If you know a link to it, please post it
G'day, Gadget Addict! Thanks for uploading this video for those of us, who are, well, maybe a little lacking in the tech knowledge area! I recently bought one of thos slim powerbanks that you showed briefly, sucked in by the (as it turns out) false claim of 50,000 maH for practically nothing. Do you ever make 'expose' videos about that kind of rubbish? Love your really measured, understated presentation btw.
Hi, just wanted to know if it would work as my battery for my laptop?. I removed the old battery of my laptop due to swelling, and I am running my laptop plugged in.
Hi. I really like your review videos and I am a follower. What do you think is the best powerbank with the highest capacity? I just want to use it to powerup my router and I want it to be the longest capable one to powerup up maybe for 1 to three daya of power outage. I will appreciatw your reply.
Hey, in the description you mention that the 12v output only goes up to 3.5 amps so = 42 watts and then it cuts off.
and you plugged an inverter to it, so if the load on the inverter passed 42 watts will it shut off, i mean the light doesn’t draw much power from the inverter, but lets say I wanted to run multiple lights for a camping situation that will draw more than the 42 watt limit, I’m assuming it will shut off, and if so, wouldn’t it be kind of pointless to use it with an inverter, anyways i just wanted to get a clarification since I’m not very knowledgeable with those stuff
On the other hand, what about portable jump starters, they can supply huge amounts of amps but not constantly i suppose (ravpower goes up to 600 amps peak, anker maybe 400), so even if i drew only 10-15 amps (150-180 watts) their safety systems doesn’t let them to run constantly so the inverter would shut off anyways right?
the best solution i found is from RAVPower, one of their car starters does have a cigarette lighter port that would supply 20 to 120 watts of constant power, only issue is that the power bank capacity is 18000mAh so it wouldn’t be able to run an inverter at that capacity for long before the battery dies.
Hi, I'm thinking of buying the maxoak but really can't make my mind up between this and the Ravpower with built in ac? Am I right in thinking that the Maxoak would be the better choice with the addition of a separate ac inverter? I would have to buy one of these as I don't feel confident enough to make one. Anyhow, any advice you may have would be greatly appreciated. BTW I live over in the uk so will be using 220V. Cheers.
I have this powerbank and yeah it's brilliant for charging smartphones and laptops but running lower current draw devices the powerbank refuses every time and turns off, so annoying.
hopefully they upgrade this with usb-c out/in. I could see them using up to 45w in/out
Going on a large motortrip around half the world.
How can i charge this powerbank while riding ? I have the cig plug on my bike. Using a converter to make 230 volt and then use the charger is really not an option.
Any tips ?
Can I bring this onto a plane for international travel ?
Great for outing/camping :)
would it be safe to use a "USB C to DC 5.5x2.1mm Power Cable" to fast charge a phone?
How long will those batteries last in the device? 3 years 8 years 12 years? 1000 charges?
WE NEED TO KNOW WHAT"S INSIDE! xD Keep up the good work!
What should be the power rating of a device
In order for it to be eligible to be allowed on an airplane?
may sound crazy. But what about charging 30 smaller devices
Is there other battery banks that able to go on planes that has a dc output port of 12v 5amps just interested airports say 100wh to be able to travel without approval
very important question,i live in the USA,does this item come a power cord plug that plugs into the US WALL OUTLETS to recharge the powerbank.
Do you have any suggestions on how to charge a laptop with USB-C ports only? Thanks,
I want to charge this via USB, can i get a converter to it?
Another question: It can charge Laptops but can it run laptops with no battery in it? I have a Laptop wich i only use without a battery and i want to use it with this power bank, is it possible?
Hi there, thanks so much for the video. Have you charged this baby up using solar yet? If so, which solar panel and what were the results? Thank you kindly -GLS
Thank you for the video. How long does it take to charge the powerbank.
So... How long does it take to load this beast? EXACTLY!!! Please!
Hi. So, if i understood clearly with Maxoak K2 i can charge my Acer aspire 7 130w ? My acer is without usb c charging but there is a lot of adapters for that.
How many times are you able to charge a phone on this puppy?
Lenovo G40-70 ..... same with what i am using.
Awesome powerbank ..... how much was it ?
great review man. keep it up
i highly appreciate your video
loved it
This would compatible with laptop 19.5 V/ 3.3 A ?
I have got my HP laptop
Thanks for a very informative review
Sorry, that should have read "power plug says the output is 12v 3a 36w"...
Personally, I think this should've included QC 3.0 at 24W/USB-C PD 2.0 for universal charging, just in case you forget your DC input jack charger.
That would be a nice addition. I still like the included charger because it's nearly double the speed of QC 3.0 but it would be nice to have both options.
Especially USB Type C with the Power Delivery 2.0 protocol, which can deliver 100W at 20V, which would've made it excellent.
You mentioned that, one can’t travel with it!
Would it be possible to place it in my luggage bag? Not the hand bag!
Do a 5v or 9 v product
i want to use mine for Audio DAC router , usb filter I THINK i can get cleaner sound
Can this be charged using 80 watts solar panel?
does this power bank comes with a 110 power plug for the usa
how much conversion efficiency if you are using 20V and 12V ports?
big fan of this guy. good infos.
keep it up sir.
Thank you !
The oddest thing I find about my L2 is the absence of the polarity on the 12v and 20v DC outputs nor any illustrations nor mention of polarity of the outputs.I find tga t a bit odd and a negative and valid about the K2 ,especially considering the extreme importance of polarity in a DC application.
True one with little to no electrical knowledge may be able to rightly assume or realize the polarity of the 20v output would be the same as that of their laptop,but what about someone only using the 12v output and/or not using the 20v output for a laptop,nor having a laptop to check for a polarity indicator on the device.?
The polarity of the DC outputs should be clearly marked on the K2
Looking at the list of compatible laptops ,one should be able to conduct a Google search for polarity of the laptops listed in the K2 and learn what the polarity is.
I still feel the polarity should be clearly noted on the k2 and the manual.Ive watched a few K2 reviews and haven't seen a video discussing the polarity.
looks really great but im looking the ways how those powerbank 2.1mah or 1mah usb out makes charge those 12 volts devices like portable tv or laptops.
You can use a 5v to 12v boost converter with any powerbank. But the current limit will make it impractical.
That power bank with storage that you showed, what's the brand and how much did it cost? I hate carrying otg and a powerbank. It would be nice to combine the two. ;)
Cigarette lighter sockets are absolutely impossible to get in Manila. And so are plugs. Lost my mind almost. Was hoping to integrate them in a thesis project rather than normal barrel jacks. Went to e-gizmo, checked online, checked in various stores in malls...nothing. Almost considered just reusing cannibalizing commercial products but that would be too expensive.
Hello how are you! I made the purchase of a power bank this site, that pessa DHGATE can be original or fake?
I am aware this is an old video but how would you compare this to chargetech at 54000 mAh.
How does it takes to charge a 50,000 mah powerbank ?
How do we recharge the power bank it's self ???
is this available in Philippines and how much is it in Phil peso?
Hi !
At the website they say "Can't take on airplane (185Wh)". So disappointing...
Thank you, excellent review!
great review, thanks! Do you know if it would be possible to charge it with a Allpowers 60w solar panel..? Thanks!
thanks for the video. will it work with Asus FX550JX?
I have an Asus and in my laptop charger output say's 19V 4,7A it will charge while I am using it? Good video !
MAMADO 19V is under 20V so you should be good
be aware of the adapter pin and cable pin adapter failing within a year
Can I run a 120W fridge freezer from it?
is there a power meter in the form of software that I can down on my pic to read the MAXOAK battery capacity and status?
No, there's nothing like that available.
@@GadgetAddict price in India
Can we use it for jump starter if we have adaptor?
Any way to charge with a solar panel?
I have three of these units that I have used to charge three different laptops. Then they stopped charging out of my 20v port. I can still charge out of my usbs, but now I cannot charge out of 20v port? I have tried three different computers on all of these banks, an Acer, a Dell, and an HP and none of them charge anymore. Also tried multiple cords. Does anybody have a solution?
hi I don't know if I have miss about did you mention the weight of this thing?
because normally I use a 12v battery 7ah or 14ah + an 150w power inverter as my portable power source,if this is lighter then the lead acid battery this maybe a nice Buy for me...
It's around 2.7lb or 1.2KG, I think a 12v 7Ah battery wieghs in at around 2.3KG. The 12v 7Ah battery offers 84Wh although you usually don't discharge them beyond 50-60% so you'd expect less.
James Braselton hi,I don't really understand what you mean,is it because of the size of battery?