Your Position: Home > External Batteries > Prev Gen >

Anker Astro Pro2 20000mAh Multi-Voltage External Battery

Anker Astro Pro2 20000mAh Multi-Voltage External Battery

Charger- 40W 5-port desktop charger

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 a wide range of laptops – in addition to virtually all USB-charged devices.

Laptop compatibility criteria:

(1) voltage: 12V, 16V or 19V, (2) current: 3.5A or less, and (3) a laptop connector size that fits your power input (see below).

Laptop connector tip sizes (in mm):

6.00 x 4.25 - Sony VAIO
6.25 x 3.00 - Toshiba Satellite A105, M35
5.50 x 2.10 - Toshiba T1900, T1950, T4700 / AcerNote 330T , Acer Aspire 1200
4.75 x 1.70 - ASUS Eee 900, 1000
5.50 x 1.70 - Acer Aspire One AO722 AO725 AOD270
5.50 x 2.50 - ACER Aspire 1600, 5610
4.00 x 1.70 - HP Mini 1000/ 1100 PC Series
5.00 x 3.25 - Samsung NC10, N130, N310
7.40 x 5.00 - HP Pavilion DV6 / HP G60, G61/ HP Compaq CQ60, CQ61 / HP 550 / Dell inspiron 1525, 6000, E1505
7.90 x 5.40 - Lenovo ThinkPad T60, X60, R60

For optimal use

- To ensure complete safety and best performance, we strongly recommend using your device’s original cable, a third-party certified cable (such as MFI) or our included cable.

Popular Compatible Models

Apple: iPhone 5S, 5C, 5, 4S, 4, 3GS / iPad, iPad 2, iPad 3, iPad 4, iPad mini / iPod (Apple adapters not included)
HTC: One Max, One, One X, S, V / Sensation, Sensation XE XL / EVO 4G / Radar 4G / Inspire 4G / Vivid 4G / Wildfire S / ThunderBolt / Incredible 2 S / Rezound / Desire X, C, V, HD, S, Z
Samsung: Galaxy S4 / S4 mini / Galaxy S3 / Galaxy Note 3 / Galaxy Note 2 / Galaxy S2 I9100 / Galaxy S I9000 / Verizon Galaxy S3 I535 / AT&T Galaxy S3 I747 / Sprint Galaxy S3 L710 / T-Mobile Galaxy S3 T999 / T-Mobile Galaxy S2 T989 / AT&T Galaxy S2 I777 / AT&T Galaxy S2 Skyrocket SGH-I727 / Galaxy Nexus / Focus S / Infuse (Galaxy Note 10.1, Tab 2, Tab 7.0 not supported)
Motorola: X Phone, Droid Razr, Bionic / Atrix 2 / Triumph
LG: Nexus 4, Optimus 4X, 2X, V, S, T, 3D, 7
Nokia: Lumia 1020 920 820 900 710 800 / N8 / N9
Others: Blackberry Z10 Torch Curve 9900 9360 9320 / Sony Ericsson Xperia Arc S, Sony Xperia Z,X10 / PSP / Nook Color / MP3 MP4 MP5 / GoPro / Amazon Kindle, Kindle Fire,Nexus 7

Customer Reviews

Amazon Customer
  • Extra Power for My Surface Pro
  • Purchased the Astro Pro2 for backup power for my Surface Pro. Separately purchased a Surface Pro power cable adapter from GooDGo. With the cable adapter, the Astro Pro2 gives me almost double the run time. Highly recommend. I also use the Astro Pro2 for my cell phones and other devices. Works great with all.
  • 2014-04-16

John D. Tippetts
  • Best back up battery ever!
  • This battery is about the size of a kindle but it will power my laptop for hours. My laptop will only last about 2.5 hours and this battery extends it at least 2 - 3 times that long - not sure how long because I've never used all the charge.
  • 2014-04-16

Hakan Soderbom
  • Save my life many times
  • I love this battery that has saved me many times. The reason for the star reduction is as follows: - I had to buy extra adapters for my Dell XPS 12 - Cables are easy to lose (it is of course useless if you leave any of the cables at home) - I have seen other solutions where cables are integrated - Not cheap - It gives my PC about 2h extra. Wish it was more like 6-8 hours...
  • 2014-04-16

Robert Davis Robert Davis
  • Strong
  • The case is strong and the operation is easy. The size is thin, which is nice for packing in a carry bag.
  • 2014-04-13

Dennis Porter
  • Great product for extended stays away from power sources
  • The Anker 20000Ah has met my every expectation. I bought this to keep my Samsung Galaxy 4, Ipod and Garmin GPS watch going when I head out on the river on my kayak for a week or more without any power sources. I have carried three extra Galaxy batteries before and run out of juice for everything by the end. I have now kept everything running for a ten day trip with power to spare. It is relatively small, packs into a waterproof bag easily and travels well where weight and space are at a premium.
  • 2014-04-12
<< < 1 2 3 4 5 6 7 8 9 10 > >>

Customer FAQ

Q1.  Can I use USB cables othan than those provided with my Anker external battery?
To ensure complete safety and best performance, we strongly recommend using your device’s original cable, a third-party certified cable (such as MFI) or our included cable.
Q2.  Does it work with the new iPhone 5s, 5c?
Yes. But the Apple connector is not included. Please use your device's original cable.
Q3.  Anker external batteries' efficiency.
ALL external batteries lose power due to voltage conversion and circuit resistance.

Approximately 20% of Astro 2nd Generation external battery’s total capacity is consumed, including power lost from circuit heat and voltage conversion within the external battery (approximately 6%) and the charging cable and your device (approximately 14%). This efficiency rate is 15% higher than the industry average of 35%.

Older Astro batteries have lose approximately 30%.

According to industrial standards, all external batteries are labeled based on their raw cells capacity not efficiency. Like others, we are following this standard.
Q4.  How long will the battery lasts while not in use?
Generally, most of our external batteries' static power consumption is lower than 100uA, which will take between 3.5 and 20 years to drain the battery completely.

However, the chemicals within the li-ion battery will gradually become less active over prolonged periods without use. Most will die in 2 years of inactivity.

To extend your battery's life:
1. Charge and recharge it at least once every 3-4 months.
2. Do not over-charge or over-discharge it. It is best to keep it charged between 5%-95%.
Q5.  Can Anker external batteries be used for international travel?
Yes. Be sure the USB adapter you bring with is compatible with the voltage of the country you will be traveling to. An adapter's voltage input is usually printed on the adapter.
Q6.  Can external batteries be taken on board airplanes?
Yes, all Anker external batteries can legally and safely be taken on board airplanes. Here are the relevant requirements:

Quoted from Federal transportation security rules (Effective January 1, 2008):
Lithium ion batteries (a.k.a.: rechargeable lithium, lithium polymer, LIPO, secondary lithium).
-Passengers may carry consumer-sized lithium ion batteries [no more than 8 grams of equivalent lithium content or 100 watt hours (wh) per battery]. This size covers AA, AAA, 9-volt, cell phone, PDA, camera, camcorder, Gameboy, and standard laptop computer batteries.
-Passengers can also bring two (2) larger lithium ion batteries (more than 8 grams, up to 25 grams of equivalent lithium content per battery) in their carry-on. This size covers larger extended-life laptop batteries. Most consumer lithium ion batteries are below this size.

Anker's largest external battery is currently the Anker Pro 20000mAh (74 wh) which is lower than the above 100 wh limit.
Q7.  What can I do if I lose the provided accessories?
Please check to see if you have extras or contact us via email at support@ianker.com for help.
Q8.  Anker external batteries' compatibility
Anker external batteries are compatible with Android and Apple smartphones and tablets except Asus devices ( Apple connectors are not included, please use your devices original cable).
Q9.  Can it be charged and charge other devices at the same time?
Yes, this battery can simultaneously charge and discharge. However, constant pass-through charging may affect the battery’s lifespan
Q10.  Do I need to press the power button when charging other devices?
Yes.
Q11.  Can it charge multiple devices simultaneously?
It can charge two devices simultaneously.
Q12.  Can it charge the Samsung Tab?
No.
Q13.  Is it compatible with Asus tablets?
No.
Q14.  How can I tell if this external battery is compatible with my laptop?
Please make sure your laptop's input is the same or lower than the Anker Astro Pro2's and there is a tip in the list bellow that will fit your laptop.

Laptop compatibility criteria:
(1) voltage: 12V, 16V or 19V, (2) current: 3.5A or less, and (3) a laptop connector size that fits your power input (see below).

Laptop connector tip sizes (in mm):
A - 6.00*4.25 - Sony VAIO
B - 6.25*3.00 - Toshiba Satellite A105, M35
C - 5.50*2.10 - Toshiba T1900, T1950, T4700 / AcerNote 330T , Acer Aspire 1200
D - 4.75*1.70 - ASUS Eee 900, 1000
E - 5.50*1.70 - Acer Aspire One AO722 AO725 AOD270
F - 5.50*2.50 - ACER Aspire 1600, 5610
G - 4.00*1.70 - HP Mini 1000/ 1100 PC Series
H - 5.00*3.25 - Samsung NC10, N130, N310
J - 7.40*5.00 - HP Pavilion DV6 / HP G60, G61/ HP Compaq CQ60, CQ61 / HP 550 / Dell inspiron 1525, 6000, E1505
K - 7.90*5.40 - Lenovo ThinkPad T60, X60, R60
Q15.  How long does it take to fully charge this Anker external battery?
4-5 hours with the included adapter.
Q16.  What do the LEDs indicate when the external battery is charging itself or other devices?
The LED indicator will remain unlit when charging other devices. When it is recharging itself, the lights will light up one by one to indicate the charging progress. The LED indicators will all turn off when the Astro Pro2 is fully charged.
Q17.  How can I identify the voltage for my laptop?
Please refer to your laptop's instruction manual, the label on your laptop's battery or its orininal AC adapter.
Q18.  How can I determine the appropriate connector for my laptop?
We offer 10 laptop connectors for you to choose from. Please choose the appropriate connector according to the size and shape of your adapter’s plug. Please refer to the above list in Question 6 for the specifications of certain laptop connectors.

Note: The tips provided are the only ones Anker produces. If you can not determine the tip size of your device from the above table, please contact the devices manufacturer. If a tip for your computer is not provided, this unit may not be suitable for your needs. If you still require assistance, please contact us.
Q19.  What if the Astro Pro2 fails to recharge?
a. Check that the AC adapter is connected securely.
b. Please email us at support@ianker.com duiring your 18-month warranty period if the provided acessories or the external battery have problems.
Q20.  What if the Astro Pro2 fails to charge my devices?
a. Check that the connection between the Astro Pro2 and the electronic device is secure.
b. Check that the Astro Pro2 still holds a charge, and recharge it when the remaining power is low.
c. Check that the Astro Pro2's voltage is compatible with the electronic device's.
d. Make sure that the charging cable is working.
e. Please email us at support@ianker.com duiring your 18-month warranty period if the provided acessories or the external battery have problems.
Q21.  What voltage setting should I select to charge my phone or other USB-charged device?
You do not need to select a voltage. The voltage switch only controls the round, DC output port and not the USB ports (USB ports are always 5V).

You may also like

Feel free to ask questions about this product here.
Your question will be posted on this page.
Anker Customer Support and the Anker user community will do their best to quickly answer your question.

Title:*

Comment:*

Please enter the verification code - humans only!*

  

Latest Post

AC Input

Can I charge the battery with 220 VAC 50 Hz???

Replies(3) Collapse Report as spam Apr 17, 2014 at 10:34 AM
Absolutely you can!
Reply Report as spam Apr 17, 2014 at 10:30 PM
gherardini

Read from mine: "INPUT: AC100 - 240V 0.8A 50/60 Hz"

Yes.

Reply Report as spam Apr 17, 2014 at 10:53 AM
Fire and Ice

Yeah! Should be no problem!

Reply Report as spam Apr 17, 2014 at 8:02 PM
Size of DC output port

what is the size of the DC output port? I am looking up splitters to power two DC devices at once. (both the same, at 5.5mm x 1.5 mm).  Anyone got a good link for splitters?

 

Replies(3) Collapse Report as spam Apr 16, 2014 at 10:14 PM
The measurement you're looking for is 5.5 x 2.5mm.No recommendations for the splitter I'm afraid but please let us know what you end up going for!
Reply Report as spam Apr 17, 2014 at 3:00 AM
Fire and Ice

You should be careful with splitters. Know what you're splitting and how that'll affect the current draw

Reply Report as spam Apr 17, 2014 at 8:00 PM
gherardini

I'd find a cable with a matching end and split it in the middle of the cable with a switch. I doubt you're going to find something that will split the cable right at the port.

Reply Report as spam Apr 17, 2014 at 8:55 AM
Spec question

What are the dimensions and weight of the battery only?

 

if you don't have the matching tip, can I easily get additional sizes?

Replies(4) Collapse Report as spam Apr 16, 2014 at 7:55 PM
gherardini

From above:

Capacity 20000mAh
Output USB output: 5V, 2A; DC output: 12V / 16V / 19V, 2A
Input 15-19V / 1.3A
Weight 562 ± 10g / 19.8 ± 0.4oz
Size 185 × 125 × 15.5mm / 7.2 x 4.9 x 0.6in

 

As for tips, they are proprietary design. Unless Anker is interested in making more of them, which seeing if they are not continuing the 1st gen design, I'm going to guess "No," you likely won't see more. Great product, love mine.

Reply Report as spam Apr 16, 2014 at 8:09 PM
dk9196

Thanks!

Reply Report as spam Apr 16, 2014 at 8:16 PM
gherardini

N/P.

Reply Report as spam Apr 16, 2014 at 9:43 PM
The dimensions: 4.9 x 7.3 x 0.6 inches ; 1.2 poundsYes, tips are readily available. You should confirm exactly which your device requires before making a purchase.
Reply Report as spam Apr 18, 2014 at 3:30 AM
Radio Transmitter

Greetings,

 I am interested in your pro 2 20000 mAh battery to power my DC 12v 1.3 amp radio transmitter. 

here is the product link:  http://www.go-on.cn/_d276178068.htm

I have sent an email to its manufacturer to determine the exact size of its power port. I am awaiting back.  (is a mm ruler accurate enough to determine the size on my own?)

Is there a possibility that the center pin polarity is different on this from laptop chargers?

Could you tell me if this is the right battery for my application.  For about how long could this battery could run a single transmitter?  (Im guessing it is not possible to split the DC out cord and power two at once.)

I ideally need 4-6 hours of run time, but a solid 4 hours is all I need. what is the best suited battery you make for my needs.  Looking to purchase asap. Thanks. 

 

 

Replies(2) Collapse Report as spam Apr 15, 2014 at 11:17 PM
gherardini

This, I think, is the only battery that will suit your needs, as the 1st gen Astro Pro 2 is the only battery that has variable voltage control. They took that feature out of the 2nd gen. 4 hours of 1.3A power should not be a problem for it, and you'll likely get more than the 6 you are looking for. I bet closer to 9 or 10. I don't see why you couldn't split the power cord [not supported]bbut you'll get half the total power time. You might want to be sure of how long it powers a single device before doubling up on it. Good luck.

Reply Report as spam Apr 16, 2014 at 12:06 AM
Willie

Thanks!

\Think this will work to split them?

http://www.ebay.com/itm/DC-1-Female-to-2-Male-Power-Splitter-Cable-for-2-1mm-x-5-5mm-Jack-/251448416758?pt=US_Surveillance_Cables_Adapters_Connectors&hash=item3a8b7e59f6

~willie

Reply Report as spam Apr 16, 2014 at 10:30 PM
Chargin via USB port in my car?

Can this device be charged via USB port in my car?

Replies(2) Collapse Report as spam Mar 21, 2014 at 11:01 AM
gherardini

Yes. THough it's going to take a wee bit of a bite our of your battery if you aren't charging while running your engine. Like if you left it overnight to charge. Otherwise, No problemo.

Reply Report as spam Mar 21, 2014 at 11:44 AM
HammerNexus

Probably not a good idea to leave it charge in your car overnight.

You don't want a dead battery in the morning before work, now do you?

Reply Report as spam Mar 23, 2014 at 12:51 AM
tip for 2014 Dell XPS 15 laptop

Hi, I just purchased a 2014 Dell XPS 15 with touch screen that has a smaller diameter charger plug the pre 2014 XPS 15 models.

I have had one battery person descibe my 2014 XPS 15 tip as possibly the same as used on  XPS Dell Laptops 12  a smaller diameter tip.   I see you list the 6.0 x 4.25mm adapter end....does this have a center pin inside the adapter?   does the 6.0 x 4.25mm list which Dells it would work with?  I am wondering if theis is the tip needed for my Dell 2014 XPS 15

or are there other plug ends designed for a 2014 Dell XPS 15?

let me know Jeff Coffman 330-319-4277  jeff.coffman@wolterskluwer.com

Replies(2) Collapse Report as spam Mar 20, 2014 at 1:32 PM
HammerNexus

I dont think this has enough power to charge an XPS 15

Reply Report as spam Mar 20, 2014 at 5:12 PM
Shawn

you should edit your post, mate. delete your phone number and email address. however as HammerNexus says, it probably wouldn't have the ability to charge your Dell. Certain models made by Dell have proprietary charging plugs to keep non-Dell products from competing against them. It's horrible, i know, but they're greedy and may have a patent on that type of charging plug.

Reply Report as spam Mar 21, 2014 at 12:50 AM
Dell XPS compatability
I see your ad page with the battery has an image of the Dell XPS, in fact it looks like my computer- however you compatability list does not include Dell XPS. can you clarify if the tip fits dell, if I can use your battery as a life extender or even to charge. its 90W, 19.5V. I have scoured comments here and on amazon- and you seemed to be mixed responses on the Dell. thanks
Replies(1) Collapse Report as spam Mar 12, 2014 at 2:42 PM
HammerNexus

I don't think this can charge a 90W battery but that's my "expert" opinion. 

The power draw is too high

Reply Report as spam Mar 20, 2014 at 5:24 PM
Anyone fly with these as carry-on items?
Anyone bring these as carry-on items on a flight? TSA give you a hassle with them? Or are they good to go items?
Replies(7) Collapse Report as spam Mar 10, 2014 at 12:44 PM
IT Owl
You'll be good to go. TSA will usually just x-ray it and will let you go on. I haven't had a problem. Although one time, they made me put it into a separate bin for scanning again
Reply Report as spam Mar 10, 2014 at 1:03 PM
gherardini
Cool. Thanks. I'm terrified of bringing it and losing it.
Reply Report as spam Mar 10, 2014 at 1:17 PM
David Hocutt
I've been asked to show it a couple of times, but once I show it is a battery there is no problem. The size and density worries them on the X-Ray.
Reply Report as spam Mar 10, 2014 at 2:09 PM
gherardini
That's most of what I was expecting. As long as they're cool that it's just a battery, excellent. Thanks.
Reply Report as spam Mar 10, 2014 at 2:45 PM
TechToyWizard
Per my friend who's in the business, batteries intended to operate a specific device are generally okay but airline policies vary regarding carrying batteries aboard. It's conceivable that you may get an occasional agent that will ask you to put it in your luggage. One hint is to have it already connected to your phone when you place it in the bin to reinforce that it is part of that specific device.
Reply Report as spam Mar 10, 2014 at 2:46 PM
gherardini
I wonder if that might be a liitttlle hard to sell with something the size of the Pro 20k connected to a tiny smart phone which it dwarfs. But good advice, maybe i'll look at connecting them when they go through the checkpoint. thanks
Reply Report as spam Mar 10, 2014 at 3:19 PM
gherardini

I had zero problems. I left it out next to the laptop, but they didn't look at them twice.

Reply Report as spam Mar 20, 2014 at 2:09 PM
Does it support Sony Vaio VPCSB series?
hello, i would like to ask if this external battery will fit with my Sony Vaio VPCSB laptop. my adapter is 19.5V,4.7A, connector 6.5*4.4 Mm. If no, do you have any other? Thanks, Radek
Replies(1) Collapse Report as spam Mar 7, 2014 at 12:28 AM
AnkerMember431
If you see your tip above in the picture, then it should.
Reply Report as spam Mar 7, 2014 at 5:00 PM
Input Voltage Spec
Can the Anker Astro Pro2 20000mAh Multi-Voltage External Battery handle a typical 30W solar panel directly as it's charger? The solar panel would output 18-22V, which only overlaps your stated input spec slightly. With a direct connection, the solar panel should adjust to the voltage of the battery, and the battery should cut-off the charge when it reaches it's max voltage (with maybe an equalize or float function to taper off the current draw). The question is really can I hook this up to the solar panel on a bright day and forget about it while it safely charges and eventually terminates the charge?
Replies(0) Collapse Report as spam Mar 4, 2014 at 6:36 PM
<< < 1 2 3 4 5 6 7 8 9 10 > >>


Back To Top


Submit your email address here to subscribe the latest information regularly about our promotion activities and new products.

Thanks for taking the time to visit our site. If you have general questions and suggestions, we’d love to hear from you through the form below.
For more specific inquiries relating to customer service, wholesale, or media requests, feel free to visit our contact us page.

FIRST NAME

LAST NAME

YOUR COUNTRY*

E-MAIL*

TELEPHONE

COMMENT *