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Anker Astro Pro2 20000mAh... has been added to your Cart
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Anker Astro Pro2 20000mAh Multi-Voltage (5V 12V 16V 19V) Portable Charger External Battery Power Bank for iPad Air, Mini, iPhone 6, 5S, 5C, 5, 4S, Samsung Galaxy S5, S4, S3, Note 3, 4, HP, Dell, Acer, Asus, Toshiba Netbooks, Notebooks and many other devices (Apple adapters - 30 pin and lightning, not included)

by Anker
516 customer reviews
| 437 answered questions
Price: $199.99
Sale: $99.99 & FREE Shipping. Details
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Sold by AnkerDirect and Fulfilled by Amazon. Gift-wrap available.

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  • 20000mAh of capacity, provides 1 full charge to most laptops or approximately 9 cycles to most smartphones.
  • Reliable lithium polymer battery ensures quality. More than 500 recharges over its lifetime.
  • Equipped with two outputs for greater versatility: 1 DC 12V / 4A, 16V / 3.5A or 19V / 3A port and 1 USB 5V / 2.1A port.
  • Slim and stylish aluminum body ensures efficient heat dissipation, lighter weight, and durability. 4 smart LEDs keep you updated as to the remaining capacity.
  • Package contents: 1 Anker® Astro Pro2 20000mAh External Battery, 4 phone connectors, 10 laptop connectors, 1 USB cable, 1 DC power cable, 1 AC 100-240V power adapter, 1 accessories pouch, 1 user manual.
3 used from $79.99
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$99.99 & FREE Shipping. Details In Stock. Sold by AnkerDirect and Fulfilled by Amazon. Gift-wrap available.

Fulfillment by Amazon (FBA) is a service we offer sellers that lets them store their products in Amazon's fulfillment centers, and we directly pack, ship, and provide customer service for these products. Something we hope you'll especially enjoy: FBA items qualify for FREE Shipping and .

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Frequently Bought Together

  • Anker Astro Pro2 20000mAh Multi-Voltage (5V 12V 16V 19V) Portable Charger External Battery Power Bank for iPad Air, Mini, iPhone 6, 5S, 5C, 5, 4S, Samsung Galaxy S5, S4, S3, Note 3, 4, HP, Dell, Acer, Asus, Toshiba Netbooks, Notebooks and many other devices (Apple adapters - 30 pin and lightning, not included)
  • +
  • T-Head Power Bank Male Connector DC MagSafe 2 Cable For Apple Macbook Air Pro 5.5x2.5mm
  • +
  • iRun® L Head DC Power Cable with MagSafe Compatible Connector for Apple MacBook 5.5x2.5mm New
Total price: $114.59
Buy the selected items together

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Product Description

Need to charge more than just your mobile phone? Invest in greater, more versatile power with the Anker Astro Pro2.

A beast of a battery.
When a standard external battery just won't cut it, reach for the Astro Pro2. Packed with 20000mAh of capacity, this is one portable power pack that's able to charge most phones 9 times, tablets more than once or a laptop one time.

Hugely versatile.
Choose from between DC 12V / 4A, 16V / 3.5A, 19V / 3A and USB 5V / 2.1A outputs for greater accessibility. The three voltage selections enable this external battery to charge laptops (that meet compatibility requirements) - in addition to virtually all USB-charged devices.

Laptop compatibility requirements (both must be met), Please check to ensure compatibility before purchasing:
1) Voltage input: 11.5-12.5V, 15.5-16.5V or 18.5-19V.
2) A laptop connector that fits your device's power input port (see below).

Included laptop connector tip sizes (outer x inner diameter in mm):
A - 6.00×4.25 - Sony VAIO
B - 6.25×3.00 - Toshiba Satellite A105, M35
C - 5.50×2.10 - Toshiba T1950, T4700 / Acer Aspire 1200
D - 4.75×1.70 - ASUS Eee 900, 1000
E - 5.50×1.70 - Acer Aspire One AO722 AO725
F - 5.50×2.50 - ACER Aspire 1600, 5610
G - 4.00×1.70 - HP Mini 1000/ 1100 Series
H - 5.00×3.25 - Samsung N130, N310
J - 7.40×5.00 - HP Pavilion DV6 / HP G60, G61/ HP Compaq CQ60, CQ61 / HP 550 / Dell inspiron 1525, E1505
K - 7.90×5.40 - ThinkPad T60, X60, R60

Get to know us.
The Anker® Astro external battery has been voted #1 in class by thousands of online reviewers, while our renowned customer service has made us a fan-favorite across the web. Every sale includes an 18-month, worry-free guarantee to prove the importance we set on quality. After all, we're customers too.

Product Details

  • Product Dimensions: 4.9 x 7.3 x 0.6 inches ; 1.2 pounds
  • Shipping Weight: 2.4 pounds (View shipping rates and policies)
  • ASIN: B00B45EOYS
  • Item model number: 79AN20L-SA
  • Batteries 1 Lithium ion batteries required.
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (516 customer reviews)
  • Amazon Best Sellers Rank: #10,915 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories)
    • Product Warranty: For warranty information about this product, please click here
  • Date first available at Amazon.com: January 22, 2013

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Customer Questions & Answers
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Customer Reviews

Most Helpful Customer Reviews

302 of 320 people found the following review helpful
Beautifully designed product that works well! This is the most powerful battery pack I have ever tested!
By JJCEO #1 HALL OF FAMETOP 10 REVIEWER on April 8, 2013
Length: 7:59 Mins
This battery pack is simply the most powerful rechargeable battery pack that I have ever tested. It is also the highest quality design and construction that I have seen in any battery pack. I was so impressed that I put together a video of the unit and the test results for your review.

The construction of this battery pack is simply beautiful. The exterior shell is brushed aluminum that looks fantastic. The battery is the size of a 7 inch tablet and it weighs in at 1 pound 4 ¼ ounces. It is assembled with machine screws and the overall construction is the best I have seen. The battery pack has a USB output port that outputs 5 VDC at 2.1 Amps. It can also output 12 VDC at 4 amps, 16 VDC at 3.5 Amps and 19 VDC at 3 amps to charge many laptop and netbook computers. There is a voltage switch to set the output voltage for specialty charging so make sure that you set it to match your needs of your device. This is important.

This is the first battery pack that I have seen that has enough power to charge an iPad 3 fully and in reality it could charge it 1.3 times according to my tests. I was able to charge my electronic devices for over 10 hours on a single charge of the battery pack which is amazing. Nothing I have ever tested has even come close to the performance of this battery pack. During the testing the temperature of the battery pack never even exceeded ambient room temperature. I used the USB port to charge my devices during this testing. To start your device charging connect it with the proper cable and power adapter, set the voltage if required and press the battery pack power button and charging starts. The charging will stop automatically when your device is fully charged or the battery pack is depleted.Read more ›
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184 of 193 people found the following review helpful
Great Product, but you need to know this:
By Matkat on June 7, 2013
Verified Purchase
There are several reviews that complain of two faults with this external battery, and the reviewers downgrade it as a result. I have found that these issues are not really problems.

1st Reported Issue: The USB port doesn't work.
Yes, it probably does - it just doesn't work automatically. Unlike the 12v,16v and 19v pin output which begins charging your device as soon as it is plugged in, the USB output port has to be turned on by pressing the front panel button on the battery. This can be confusing and I believe several people just decided the USB charge port didn't work when it didn't begin charging their USB devices. Just push the button and it will work.

2nd Reported Issue: The battery can be shorted making it useless
I thought this too after I accidentally connected the input and output ports on the battery. It went dead immediately and nothing would get it to start. However, Anker support suggested I connect the battery to the wall charger. As soon as I did this the battery began working again. Connecting the battery to the wall charger resets it. So again, no problem.

Neither of these tips are documented in the battery's instructions so I can understand how people would think the battery was defective when it was actually fine.

I really like this external battery. It is easier to carry around than a wall charger and you can recharge almost every electronic device you own anywhere. It has a lot of capacity and once you know its two quirks it's foolproof to operate. Support from Anker has been great - they are very responsive.

I would like to see Anker redesign the input and output ports so they are not so similar. it is very easy to confuse input and output since they are both pin plugs right next to each other. I ended up putting a piece of electrical tape over the input port just for safety.
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67 of 80 people found the following review helpful
Nice battery pack!
By Amazon Customer TOP 500 REVIEWER on March 16, 2013
This is a review of the Astro Pro2 20000mAh battery pack.

I am impressed with this pack. It is good looking and well built, enclosed in a nice aluminum enclosure. It feels very solid & includes a multitude of mobile phone and notebook connectors. If you have a USB device that charges via USB, then there should be a connector for it.

Pros:
* Relatively high capacity at 20000mAh/74Wh
* Easily charge it with the included AC adapter
* Very nice brushed aluminum enclosure & great build quality
* The notebook output has a voltage selection of 19V, 16V, or 12V.
* Easy check of battery level with the push of a button... just look to see how many of 5 green LEDs are lit.
* Lots of connection options to change USB devices, mobile phones, and notebooks (see the product description for the details - no need to repeat them here)

Cons:
* Even with lots of connection options, it may not support your notebook/ultrabook - or may require an additional adapter to do so (like with my Dell XPS 12); see the comments on this review for a link to a "Dell power dongle" that may be useful if you have a Dell XPS 12 or XPS 13
* If you have a "beefy" notebook (like one with a discrete GPU), then it's likely possible to overload the battery if you run the CPU and/or GPU at high load, in which case the battery pack and notebook may shut down. Other things may affect the load too, like plugged in USB devices and how bright your screen brightness is set to. I did a test with my Dell XPS M1530 which the screen brightness all the way up and ran Intel Burn Test to get the CPU going and it DID work. I think it was pushing it though. The battery indicator went down during the high load but went back up when the test was over.Read more ›
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Most Recent Customer Reviews

Five Stars

works great. I purchased a second one

Published 1 day ago by Josephine
Since the battery life is not fantastic and i had quite a long flight...

I SWEAR BY all Anker products. I own an IT company and only sell Anker batteries and/or chargers when the opportunity arises. Read more

Published 3 days ago by Mike
works fine. For Macbook Pro I had to buy a ...

I bought the charger for Lenovo and Macbook Pro (2015), though not listed, works fine. For Macbook Pro I had to buy a separate T-Head power cord. Read more

Published 4 days ago by John B. Chu
Amazing battery life

Amazing battery life, compact for it's capacity, and will charge anything--bought it specifically to charge my laptop while on transatlantic flights and while travelling. Read more

Published 4 days ago by Mr. Treevers
Five Stars

Super.

Published 5 days ago by Attorney
Four Stars

Wonderful device

Published 6 days ago by as7238
Meh

Just not good, two duds on this one, now. I replaced a previous one that wasn't holding charge or reaching full capacity (it even only lit 4 of the LEDs), and the one I have now... Read more

Published 12 days ago by Kris
... fact that it's so big and heavy it works wonderful.

Besides the fact that it's so big and heavy it works wonderful.

Published 12 days ago by Teresa Soto
Great External Battery

This is a great external battery. I love that I can charge my iPhone 5S as well as my MacBook Air. I did have to purchase a MagSafe2 chord separately but it works perfectly. Read more

Published 12 days ago by Jessie
Buy one !

Have used it over 500 times. Still works like a champ.

Published 13 days ago by jdog

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