PowerOak K2 solar 185Wh / 50000mAh laptop powerbank

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Availability date: 11/30/2021


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  • REAL ULTRA HIGH CAPACITY 50000mAh/185Wh: Compatible with most popular laptops and notebooks. Cannot charge laptop with DC current Over 5,0A/95W. We provide 14 kinds of connectors for most of the popular laptops (Pls make sure the connector fits for your laptop before purchasing.). Once fully charged, our K2 solar portable battery pack can charge your iPhone 6 Plus about 11 times, iPhone 6 about 17 times, Galaxy S6 almost 11 times
  • All IN ONE FAST CHARGE: It has 6 output ports. One 20V/5A for laptops, one 12V/2.5A for digital cameras, two 5V/2.1A and two 5V/1A for most of smart phones, iPad, tablets and more USB-charged devices. You can charge several devices simultaneously to save you much Time. Fast charging speed with DC input:19V/2A enables the battery to be fully charged with 6-8 hours with grid. Charging with solar is also possible. Max 80W.
  • HIGH SOLAR BATTERY CAPACITY: This battery pack may be the smallest 50000mAh laptop SOLAR powerbank. Size only 8,1 x 5,3 x 1.3 IN / 20,6 x 13,5 x 3,3 cm and weight 2,77lb / 1,26kg.
  • 100% GUARANTEED CUSTOMER SATISFACTION: Constructed with Lithium-ion polymer battery cells with built in security protections to ensure safe use and 1000+recharge cycles. We manufacture and R&D each product ourselves.
  • INCLUDED: 1 x Laptop power bank(K2 solar),1 x Home charger, 1 x DC cable, 14 x Laptop charge connector, 1 x Multifunction bag, 1 x Manual, 1 x MC4 cable to connect most of solar panels. SOLAR PANEL NOT INCLUDED.


Energy anytime, anywhere
PowerOak stands for quality and our products are the best proof of it. 

This is a multifunctional, powerful, huge capacity power pack which is configured with 1 x DC 12V / 3A ports, 1 x DC 20V / 5A port and 4 x fast-charging 5V / 2.1A USB ports.
It has built in lithium-ion battery cell of best quality, compact, lightweight and durable.

PowerOak K2 solar 185Wh portable power bank is capable of powering your LED lights/strips, smartphones, laptops, camera, CPAP, small fans and small appliances in an off-grid or power outage situation. Ideal for indoor daily use or outdoor emergency, camping, weekend trip or wherever you need energy anytime, anywhere.

Solar charging made possible by built in MPPT. You can buy our solar panels available in the web shop or you can use your own, as long as the input voltage has a range between 15V and 25V and a maximum total power of 80W

DC12V is used for digital devices such as:
surface pro laptop / camera / CPAP /fans / small car refrigerator / led lamp / strip
(pls make sure the DC voltage match-12V)

DC20V is used for devices such as:
Most of laptops / CPAP & Macbook notebook / laptops cannot be charged with K2 solar.
It accepts DC voltage of the laptop around 20V.
14 kinds of connectors are supplied to assure a maximum compatibility with a wide range of popular laptops notebooks.

Please verify your laptop connector/Adapter Before Purchasing: 
Laptop connector/Adapter included in the Package(DC 5.5 x 2.1mm to below adapter):
A:6.0/1.4(6.5 x 4.4mm)FUJITSU/SONY
E:5.5/1.7mm Acer
F:4.8/1.7mm HP
H:5.0/1.0mm Samsung
I:7.4/0.6mm(or 7.4/5.0mm) DELL/HP
For Dell: 7.4/0.6mm(or 7.4/5.0mm) DELL
K:7.9/0.9mm(or 7.9/5.5mm) IBM/LENOVO
L:3.0/1.1mm Samsung
O:4.5/3.0mm only for HP, not fit for Dell Laptop.
Lenovo: fits for LENOVO laptop with square head with a thread in the middle
(not suitable for Lenovo laptop with half solid and half hollow)
FOR DELL: 4.5 x 3.0mm Dell laptop with 4.0 x 3.0mm
N:4.0 x 1.35mm ASUS laptop with 4.0 x 1.35mm connector
G:4.0 x 1.7mm Lenovo laptop with 4.0 x 1.7mm connector

We recommend the output voltage of solar panel is between 15-25V and the output power is less than 80W.

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:>4.5A

If your laptop turns off automatically for several seconds or minutes, it may be caused by overcurrent / lowcurrent protection.
If automatic turn off is caused by overcurrent protection , please close the screen of your laptop or fully charge 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 K2 solar can charge my laptop?
Please check the label pasted on the adapter of your laptop. If it is more than 95W (DC output current is more than 5A), 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.

Can charge Surface Pro 3 (but you need to buy the cable yourself-DC5.5 x 2.1mm to surface pro connector)
Can charge surface pro 4 (if the DC output voltage is 12V)
Cannot charge Surface Pro 4 (only if DC voltage is 15V)
Cannot charge Lenovo Yoga 3 14, yoga 900 (20V 3.21A), Yoga 3 11 13 milx 4 700s(20v 2a)
Cannot charge Dell XPS 12(Type C)
Cannot charge Apple Laptop
Cannot be recharged by car charger (12V)
Cannot take on airplane (185Wh)

Our Pledge

PowerOak K2 50.000mAh laptop power bank

With PowerOak K2 you have energy anytime anywhere. Powers almost all laptops, except MacBook and USB-C laptop
PowerOak K2

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