|Item model number||K2-50000mAh|
|Item Weight||2.77 pounds|
|Product Dimensions||8.1 x 5.3 x 1.3 inches|
|Item Dimensions LxWxH||8.1 x 5.3 x 1.3 inches|
|Batteries||1 Lithium ion batteries required. (included)|
|Is Discontinued By Manufacturer||No|
|Date First Available||June 2, 2015|
MAXOAK Laptop Power Bank 185Wh/50000mAh(Max.130W) Portable Laptop Charger External Battery Pack for Laptop iPad Phone Notebook
|Price:||& FREE Returns|
$15.00 extra savings coupon applied at checkout.
Sorry. You are not eligible for this coupon.
|Compatible Devices||IPad, IPhone 4, IPhone 5, IPhone 6, IPhone 11, IPhone X, IPhone 8|
|Item Dimensions LxWxH||8.1 x 5.3 x 1.3 inches|
|Battery Cell Type||Lithium Polymer|
|Item Weight||2.77 Pounds|
|Battery Charge Time||8 Hours|
|Number of Ports||6|
About this item
- Make sure this fits by entering your model number.
- Superior Quality&SAFETY Guaranteed: Conform to UL1642 and UL2056 Standards. Constructed with Lithium-ion Polymer Battery Cells&Built-in 6 Security Protections to Ensure Safety Use and 1000+ Long Recharge Cycles. We Offer Customers a 12 Months Hassle-free 100% Satisfaction & Replacement Warranty.
- Long-lasting DC Power Bank for Laptops:Ultra High Capacity 50000mAh(3.7V)/185Wh(130W Max.).Compatible With a Wide Variety of Laptops(Max.130W)- Dell HP Lenovo Surface pro 2/3/4(DC12V) Sony Samsung Acer Toshiba IBM NEC.We Include 14 DC Connector for Various Laptops. Once Fully Charged, K2 Portable Battery Pack Can Charge Laptops(65W) About 2.5 Times and Smartphone About 11-18Times without Using your Laptops/Phones While Charging,It is Much Power Saving than AC Outlet Power Bank.
- DC20V/DC12V/USB5V Outputs:All-IN-1 FAST CHARGE Battery Pack.It Features with 1*DC20V/5A for Laptops(18.5V~20.5V), 1*DC12V/2.5A for Cameras,Routers,LED lights, 2*USB 5V/2.1A and 2*USB 5V/1A For Smart Phones, iPad, Tablet &Other USB-Charged Devices. You Can Charge Several Devices Simultaneously to Save You Much Time. Ultra Energy Saving & Fast Charging Speed with DC input:16.8V/2.5A, OUR K2 Battery Pack Can Be Recharged in Just 6-8 Hours.
- Emergency Battery Backup for Outdoors. Size 8.1" x 5.3" x 1.3" And Weight 2.77lb.You Can Easily Put This Portable Charger in Your Briefcase ,Backpack Or the Carrying Bag. Keep your laptops, Phones, Fans,LED Lights, Nintendo Switch, Speakers, Cameras Powered During Road Trip, Hunting,Camping, Fishing,etc.
- WHAT YOU CAN GET: 1 x Laptop power bank(K2),1 x AC Adapter, 1 x DC cable, 14 x DC connector for Laptops, 1 x Multifunction bag, 1 x Manual.
Consider this Amazon's Choice product that delivers quickly
Frequently bought together
Customers who viewed this item also viewed
Customers who bought this item also bought
Have a question?
Find answers in product info, Q&As, reviews
Your question may be answered by sellers, manufacturers, or customers who purchased this item, who are all part of the Amazon community.
Please make sure that you are posting in the form of a question.
Please enter a question.
1.Not TSA approved because of high capacity 185Wh/50000mAh 3.7V
2.Can not charge Laptops with USB-C input port such as Apple Laptops(we suggest buy our B017QUHB44 for Mac Laptops)
3.Support 2 Recharge Way: AC Wallout/Car( but need to buy a DC to AC power inverter, we suggest to buy our B07PXHFTT4).
4.Compatible with 95% Laptops including Dell HP Lenovo Surface pro Sony Samsung Acer Toshiba iPad Phone Notebook
5.Can charge laptops Max.130W-135W.
6.Longer charge time/low heat than AC outlet power bank.
We found there are many power bank designed for smartphones, but no specific power bank for Laptops, so we develop this MAXOAK laptop Power Bank(Model K2) which include 14 kinds of DC connector for almost 95% Laptops(Max.130W), ultra high capacity 185Wh(50000mAh) can usually charge your laptop about 2 times+ (8Hrs+).if you are looking for a long-lasting laptop power bank, this power bank is your best choice.
Low shutdown current for 5V port:70mA
Low shutdown current for 12V port:150mA
Low shutdown current for 20V port:200mA
High shutdown current for 20V port:>7A
If your laptop turn off automatically for several seconds or minutes, it may caused by overcurrent/lowcurrent protection.
if automatic turn off is caused by overcurrent protection,Please close the screen of your laptop or fully charged your laptop first, and then use our power bank to charge the laptop.if you are trying to power a Windows laptop and the battery keeps disconnecting over and over, you might have to go into Power settings, Advance power settings, and find the setting for "Turn Harddrive off after" and set that to NEVER, and in power options DISABLER "Intel Cppc Energy Saving"
How Can i Know Whether My Laptop Will Cause Power Bank Overcurrent or not?
Please Check the label pasted on the adapter, if it is more than 130W (DC output current is more than 7A). it may cause our power bank turn off during charging for overcurrent. so we do not suggest to use our power bank to charge your laptop.
Laptop Power Bank
It is 185Wh,exceed Max.160wh flight limits, can not allowed to take on airplane.
- Cann't charge Surface Pro 4( if DC voltage is 15V) ,but Can charge surface pro 4 ( if the DC output voltage is 12V) ,Can charge Surface Pro 3(but need buy DC5.5*2.1mm to surface pro cable yourself)
- Cann’t charge Lenovo Yoga 3 14, yoga 900(20V 3.21A), yoga 3 11 13 milx 4 700s(20v 2a)
- Cann’t charge dell xps 12(Type C) and other type-C laptop
- Cann't charge Apple Laptop
- Cann't be recharged by solar panel/car charger
50000mAh/185Wh Laptop Power Bank
All-in-One Power Bank
Portable Power Station for indoor or outdoor use .Compact and lightweight potable laptop charger featured with one DC20V5A (max.130W) ,one DC12V2.5A and Four 5V USB outputs, provide off-grid power backup for emergency power failure while engaged in outdoor working and outdoor exploring life.We work and play on on our laptop, take laptop on camping trip or travel.no one wants to be caught out there with no power, this is why a good portable laptop power bank is critical and useful.
- Ultra High Capacity 50000mAh Once Fully Charged, Our K2 Portable Battery Pack Can Charge Your iPhone 6 Plus about 11 Times, iPhone 6 About 17 Times, Galaxy S6 Almost 11 Times.
- The widest compatible Laptop Power Bank Total 14 kinds of connectors are supplied to assure a maximum compatibility with a wide range of popular laptops notebooks.
- All in One Charge-it has 6 outputs for different digital devices. One 20V/5A, one 12V/2.5A, two 5V/2.1A and two 5V/1A output allow you charge several devices like laptop, tablet, phone simultaneously.
- Recharge the power bank in 6-8Hrs
- Support charge and discharge at the same time
- Built in multi-protection function including overload protection, over-current, low-current protection,etc.
- The First Power Bank Specially Designed for Laptop/Notebook
- UL Certificated, UL1642 for battery cell and UL2056 for power bank.safety is gurranted and quality is rest assured.
Portable and Easy to Carry
Dimension: 8.1"in x 5.3"in x 1.3"in (LxWxH)
20.6cm x 13.5cm x 3.3 cm (LxWxH)
it is built in 8pcs 6250mAh lithium-ion polymer battery cells,size as a book,it is real 50000mAh, so it is impossible to be very lightweight and small size as lower capacity power bank, pls check the size and weight carefully ahead.
High Quality&Safe Gurranted
We take quality, safety as the most important thing.we built in high quality lithium-ion polymer battery cell certifacted with UL1642 and whole power bank certificated with UL2056.
We have strict material inspection and production supervision and testing process, ensuring the highest quality,safety, reliability and performance.
What You Can Get
Laptop power bank(K2) x 1
Home charger x 1
DC cable x 1
Laptop charge connector x 14
Multifunction bag x 1
Manual x 1
message card x 1
|TSA-approved AC Outlet Power Bank||Wireless Charging Power Station||1500Wh 1000W Power Station||400Wh Portable Power Station||200Wh Portable Power Station|
|Output Ports||1*120V AC outlet, 2*5V 3A USB,1*PD 45W USB-C,1*LED Lighting||2* 120V AC-Outlet(Pure Sine-wave),1*10W Wireless Charging /1*PD 45W USB-C / 1*DC12V||2*AC Outlets,1*DC12V for Car Powered Devices,1*PD Type-C (Max 45W) for USB-C Devices,4*5V3A(Max) USB for phones, Tablets, Camera, Fans, light, etc,||2*AC Output,1*DC12V/5A ,1*Car Socket for car on-board 12V appliance,1*QC3.0 18W(Max) for Smartphone, Laptop ,6*5V3.5A(Max) USB||1*DC12V/10A Carport,1*QC3.0 USB(Max.18W),1*PD2.0 USB-C(5V2.5A/9V2A/12V1.5A,Max.40W),1*5V/2.4A USB Outputs|
|Used For||Small device(Max.100W), such as laptop, tablet,cell phone, drone, camera, light, Christmas tree, etc.||Small appliance(max.300W), such as TV screen, laptop, router, drone, mini car fridge, etc.||Higher load(max.1000W) such as blender, fridge, tv screen, micro oven, electric drill, and other power tools no more than 1000W. for load between 1000w to 1200w, it can load for 2mins.||small appliance under 300W such as Laptop, camera, display monitors,CPAP,LED Panel, LED lights, fans,Smartphone, Tablet, etc.||Max.100W for Laptops, Max.120W for small home appliance such as Laptop,tablet, led lamp,camera, drone,router,switch,etc.|
Compare with similar items
Top reviews from the United States
There was a problem filtering reviews right now. Please try again later.
I've had the device for a while and it's been used in some very bad environments, so I decided to run a test and see if I need to replace it. (I thought certainly it would be ruined by now.)
After 15 months of use this thing just posted a whopping 155 watthour run through the 20v output port. I couldn't be more delighted with the performance. I expected a much more degraded battery at this point because of the hot and cold temperatures it has encountered in use. I have solar charged it baking in the sun at over 10,000ft in altitude, in hot weather... resting on sand too hot to touch. In cold weather, I have solar charged this thing with temperatures below 0C. Now of course I did try to ease the stress somewhat but there's only so much you can do.
I have been solar charging this unit with an MPPT buck-voltage charge controller: https://www.amazon.com/dp/B01LYW3EAP and a Suaoki 40w solar panel. https://www.amazon.com//dp/B018TY8WWG/.
The Maxoak 50000 / K2 comes with it's own power adapter among other things. The AC to DC adapter is 16.8 volts, which is the specified input for the Maxoak K2. Fine.
The Suaoki 40w solar panel outputs 20v. So do common laptop chargers. Therefore it is important to buck the voltage before charging it with anything other than the power adapter that comes with the kit! The K2 specifies a DC input of 16.8v. I would not recommend charging the K2 with a 20v power supply, which is my only gripe with the battery pack. However, using an MPPT charge controller such as the above DROK unit is advantageous in solar collection, and it gives you the appropriate DC output for the K2. It's just a little more complicated than I would wish.
The charger that comes with the K2 is not particularly heavy, I just wish they could move to a 20v input circuit so cunning observers could carry one 20v AC to DC converter for both their laptop and the K2.
Maxoak is using Lithium-ion Polymer flat pack batteries in the K2, not just a bunch of 18650's. This gives their technology the advantage in energy density, and like I said above... I can rave about this thing's actual energy capacity. I just finished a second load test on the K2 at 23.88 watts. 6.5 hours run time, yielding 155.22 watthours AFTER more than a year of use in hot & cold, 12,000ft high altitude, and travel by touring bicycle. I've had it run dead flat many times, and even foolishly left it sit discharged for weeks. It has not been a problem.
I have used the Maxoak K2 to run many different 19-20v laptops, including Acer, Dell, Lenovo. The only unit that gave me some coil whine was a Thinkpad x200. I have also powered dozens of different 12v loads on the 12v circuit, like a router during a power outage, a Nitecore D4, 18650 battery charger, and a large external hard disk enclosure with a 7200 rpm 3.5" hard disk inside. Never had an issue with the USB ports either, in fact I run a pair of high wattage LED lamps off the K2 when I am traveling at night on the bicycle.
Do realize this is larger than the TSA allows and you may or may not get past security. I made it through Ohare, San Diego, Osaka, Tokyo, Bangkok, and Hong kong but it was confiscated in Shenzhen by the Chinese security :( Chinese airport security is super thorough and was like sorry sir, this is too large and took it :(
Natural Selection 2 in Hong Kong airport....don't judge I am an addict.
First thing to mention that is completely unrelated to the product itself is how amazing Maxoak's customer service is. I was unfortunately missing a cable from the box, and when I contacted Maxoak, they went above and beyond to make sure that my issue was resolved.
Now for the product itself and why I got it. I'm a college student that works pretty much every day I'm not in school. Both school and work require the usage of a computer in one way or another. I use a Thinkpad 11e running ubuntu 16.04 currently, and with constant usage, I get around 4-5 hours from it. I'm in school for 9 hours and work 12 hours, so it definitely does not last long enough. And most of the time, power outlets can't be found, or they are all being used.
With this battery bank, I no longer have to worry about battery life at all anymore. I don't have to carry the laptop charger with it's extremely long wires that serve only one purpose. This battery bank can charge my laptop wherever I am, along with my iphone6, and my kindle tablet at the same time. I have to recharge my battery bank once a week. I recharge my laptop maybe 10 times a week using the battery bank, and my phone around 5 times a week, and the battery bank still has charge left in it.
The only downside is that it is pretty heavy. It is built very well, and feels very sturdy. Can definitely be used as a self defense weapon if need be and put a strap on it and you could use it as a small shield probably. It comes with a very nice carry case, but annoyingly, it opens from the side, and all the I/O ports are on the top, meaning you have to take out the battery bank from the case to charge something. But that is a very minor inconvenience.
If you are constantly on the go, and you don't mind carrying around a little bit of weight for the ease of mind knowing that you will always have power wherever you are, I can not recommend this enough, especially if you use your laptop a lot. However, if all you use is a phone or tablet, and you are always in an area where there are outlets available, maybe this is not the perfect thing for you.
Top reviews from other countries
First off, this thing is a brick. I measured the unit along at about 1.2kg, heavier than some laptops now! All that battery capacity has to go somewhere I guess. The advantage of this is, it can pretty much keep my XPS 15 (another note, the battery bank comes with an adapter for the larger of the 2 Dell power plugs in use. My laptop uses the smaller one so had to get an adapter cable for it to work, but it works fine) juiced up for light use for an entire day, keeping the battery at a constant 90% (a setting I chose as the max level to charge the battery to to preserve its lifespan). You could be sitting in a library or something from opening hours to close with no need to be near a plug point if you're mostly just web browsing, listening to music etc.
Now for the limitations, the battery bank is rated for a max of 3A at 20V, equating to 60W of power. My XPS 15 comes with a 130W power supply, and will consume that much while under a heavy load using the CPU, GPU and charging the battery at the same time. As such, the battery bank is fine to keep the battery topped up and not charging or gaming, or to charge the laptop while it is turned off. Once the laptop asks for a heavier load however, such as to start charging while switched on, or a game is fired up, this trips the overcurrent protection in the battery bank, immediately shutting it off. This is more of a safety feature than a flaw, but still makes it slightly frustrating to use at times. It would be nice if there was a way for it to tell the Dell laptop that 60W is all that is available, so the laptop can either charge more slowly or use a combination of port power and battery power while gaming. As it is, you have to turn off battery charging to use your computer while plugged in, or turn the computer off to top up the battery to full. Keep in mind, this only applies cases like mine where I am trying to power quite a high powered computer. Smaller laptops such as the XPS 13 which only come with I believe a 45W power supply would be completely fine.
Overall, despite the limitations, I'm quite happy to have the battery bank available. It's better value for the capacity compared to the official Dell laptop battery bank (which admittedly does work flawlessly) while still being useful in quite a lot of applications. I don't see this being a must have device for most people, as battery life is generally good enough for most people on plenty of lower powered dual core computer out there that having a massive brick like this makes no sense to carry around. Even for me, it will likely serve as an emergency backup for when I really have to be on a long trip somewhere with no access to a power outlet (keep in mind, no flights for this thing! Too much Lithium I believe) while still trying to get a lot of CPU intensive tasks done (photo editing etc).
Its multitude of delivery ports, voltages and adapters make this an ideal companion for most DC devices that might need an emergency charge without having access to a power supply unit. Solidly made, easy to use and comes with a decent protective case to hold all your wires together.
This is one of those devices where I feel I made a great decision to purchase. Over 18 months down the line and still going strong!
I purchased the unit to power a Dell Venue 11 Pro 7139 whilst being used for astro imaging.
On unboxing I was pleasantly surprised by the quality of the build, it feels solid without being too big of heavy.
I've now run two tests with the battery powering the above tablet, USB 3 Imaging camera (with cooling fan), USB 2 hub, ioptron Smart EQ Pro & Nexguide II.
I tried to keep the test as near 'real world' as possible with the tablet running Toupcam software imaging 7 minute exposures on a loop, Nexguide running (not guiding though) & Smart EQ Pro tracking running (with the occasional change of target)
The ratings for the above equipment are as follows:
Nexguide powered by 12v to 9v, 2A adapter (Nexguide rated at 150mA)
iOptron Smart EQ pro rated at: 12V 0.1A(Tracking), 0.3A(GOTO)
Both the above were powered from the 12v port on the battery.
USB powered hub powered from the 1A USB port on the battery.
Dell Veue 11 Pro 7139 (power supply rating 23.4W 2.0A) powered from the 20v port on the battery via the the tablet micro USB charging port (custom cable by me)
The power discharge from the battery was nice & even, on each test it took approx 3 hours for each one of the charge lights to go out.
I stopped the test (both times) after 11 hours with one of the four charge lights still lit (I didn't want to have to reset the mount home position when the battery finally ran out of power)
For me this was a very unexpected result & very pleasing considering the price compared to a Tracer or Celestron battery of simular rating.
The only (very small) gripe I have (which is the same as another reviewer noted) is the neoprene case is not side opening so you can't keep the battery in the case whilst it's in use.
I will now aim to repeat the test on my CEM25P mount with the same imaging equipment connected.
Needless to say I'm very happy with my purchase!
Hope this helps you decide?