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Anker 2nd Gen Astro Pro2 20000mAh Quad-Port External Battery with PowerIQ™ Technology

Anker 2nd Gen Astro Pro2 20000mAh Quad-Port External Battery with PowerIQ™ Technology


Product Description

Tablet & phone compatibility? Universal max-speed charging? Power-packed & portable? The reinvented Astro Pro2 has it all.

Compatibility maximized.

Not all charging ports are created equal. Standard ports only communicate effectively with particular devices, like Apple OR Android, often limiting their recharge rate. But with PowerIQ™ technology, each port intelligently identifies your device to speak its unique charging language. So plug in any brand or model and enjoy compatibility that doesn’t limit your charging speed.

Uber powerful.

20000mAh of power keep you and your gear going, and going - and going. Add 1000% more battery life to an iPhone, 600% to your large-capacity phone (like a Galaxy S4), or 130-300% to your tablet (depending on its battery capacity) - all away from an outlet. What's more, the added energy efficiency gives you 10% more usable power than the previous generation and many standard alternatives.

Brilliant display.

Interacting with the all-new aluminum-cased beauty couldn't be easier. The LCD simplifies everything - displaying the remaining power (with precision down to the percent), output, input and voltage selection.

For optimal use.

• Please use your device’s original cable or a third-party certified one (such as MFi).
• Compatible with all Apple and Android smartphones, tablets (including the Nexus 7) and other USB-charged devices. The iPod nano, iPod Classic, HP TouchPad, LG G2, Asus tablets and some GPS and Bluetooth devices are not supported.

Customer FAQ

Q1.  Can I use USB cables other 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 for help.

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Latest Post

availability for France
hello, is that the battery will be available in stock for France? thank you in advance
Replies(0) Collapse Report as spam Sep 30, 2014 at 4:50 AM
Should I get the 2nd Gen?
Hi, I have been looking at getting the Anker Astro Pro2 20000mAh. I was wondering if I should get this or the 2nd Gen one? I would primarily be using it for a 19v Asus Laptop. The 2nd Gen description doesn't seem to include 19v. Should I get 'Anker Astro Pro2 20000mAh' or 'Anker 2nd Gen Astro Pro2 20000mAh' ? Also could you give me an indication of how long it would power a 19v Asus N56VZ for? Thanks.
Replies(1) Collapse Report as spam Sep 29, 2014 at 8:09 AM

We can't really suggest how long it would take to charge the Asus because charging speed is dependent on the use of the laptop at the time.

Yes, our 1st Gen Pro2 is our only battery capable of a 19V output, however, you'll also need to confirm the amperage of the Asus. The max output of the Pro2 is 3A.
Reply Report as spam Sep 29, 2014 at 10:00 PM
This battery Quad-Port 20000mAh External Battery with PowerIQ could charge without damaging an Asus TF701T and also a Samsung Galaxy Note 3? How many loads would do in each? Thank you.
Replies(1) Collapse Report as spam Sep 27, 2014 at 9:36 AM

The Power IQ technology means that it'll be able to determine the exact amount of power to deliver and will never overcharge a device.
Reply Report as spam Sep 29, 2014 at 12:30 AM
0V on screen
What is the "0V" text for on the Anker 2nd Gen Astro Pro2's screen? It appeared when I started charging the battery from 7%
Replies(1) Collapse Report as spam Sep 25, 2014 at 5:46 PM

It just notes that there is no detected output when it is on charge.

Is everything otherwise functioning well? If you are having any further problems then give our customer service guys a shout at
Reply Report as spam Sep 25, 2014 at 8:30 PM
Source for output plug ("4.3mmx1.6mm?")
Hello, I wish to purchase the 20000mAh Pro2. My device that will receive the charge from the Anker requires a special input plug. I will thus need to make up a special cable for charging. I'm OK on the my device side, but can't find a plug that is 4.3mm x 1.6mm for the Anker side, a plug with the dimensions stated on your Amazon page. 1) Could you please verify with your engineers that in fact 4.3mm (outer) x 1.6mm (inner) is correct for the multi-voltage output plug?2) Could you please advise on a source for a dc plug that fits the Anker case's multi-voltage output jack, preferably a right angle plug so I can minimize accidental breakage? Thanks for your help!
Replies(1) Collapse Report as spam Sep 24, 2014 at 7:34 AM

The output port is indeed that size on the Pro.

There is a DC output cable provided as well, it goes from 4.3mm x 1.6mm to 5.5mm x 2.5mm. So if you can find an adapter to accept the output cable then you'll be good to go.
Reply Report as spam Sep 24, 2014 at 8:30 PM
Ipad Air?
Hi I am thinking of picking up this charger from Amazon.  I was wondering if it will charge a Ipad air?  Does it come with a lightning adapter?  Or can i just use my lightning adapter that came with the Ipad?  Thank you.
Replies(1) Collapse Report as spam Sep 24, 2014 at 12:03 AM

Yes, it'll charge an iPad Air just fine but it doesn't come with the Lightning cable. You'll be able to use the iPad's original charging cable though and it'll work.
Reply Report as spam Sep 24, 2014 at 2:00 AM
Wh rating of Astro Pro2
Hi,  I'm trying to work out the total wh rating of your Anker® 2nd Gen Astro Pro2 20000mAh Multi-Voltage battery As I wish to take it as hand baggage on a plane.   So is it 20Ah * 5v = 100Wh (OK)  or 20Ah * 12v = 240Wh (not Ok on a flight)  If you could let me know the Wh rating, or alternatively let me know the voltage of the Li-ion battery prior to conversion to 5/9/12v I will be able to work out myself.Best Andy 
Replies(2) Collapse Report as spam Sep 23, 2014 at 5:24 AM

It is measured at 3.7V so you get 74Wh.

There is no problem with taking any of our external batteries on as hand luggage so please travel with peace of mind!
Reply Report as spam Sep 23, 2014 at 10:30 PM
I wouldn't worry about all the technical stuff, besides I have no idea what all that means, but I do have this unit and i've used it on four flights with no issues. I always carry on. I left it at the top of my bag, put it through x-ray and off I went noquestions asked. I also carry an external HD with it's own wifi to play my vids on my iphone and that also went through no problem. BTW the last time I flew was this past August 2014. Hope my ramblings help you.  
Reply Report as spam Sep 23, 2014 at 12:33 PM
Power for LED strip
I am trying to power 3 12v led strips, one changes colors. All are 12v. Two uses 4.5a and one uses 4.8Aa. This worked with all them for awhile but now it makes a high pitch sound when turned on powering them and the lights turn off seconds after turning on. Is it too much power?
Replies(1) Collapse Report as spam Sep 22, 2014 at 11:04 PM

The max output of the 2nd Gen Pro is 12V/1.5A so it is almost certainly because they're underpowered!
Reply Report as spam Sep 23, 2014 at 8:30 PM
Doesn't work anymore
 My unit doesn't seem to work anymore. Everytime I connect to the wall charger it only reads zero even if I've connected for more than 5 hours already. It's no longer charging and it's only been around 5 months since I bought it. I'm in the Philippines right now and I was hoping to use it for my trips to remote areas with no electricity... Please help
Replies(3) Collapse Report as spam Sep 20, 2014 at 7:53 AM
Andy Faulkner
Does the charger have an output ie. have you checked the fuse
Reply Report as spam Sep 20, 2014 at 12:11 PM

If you've tried different outlets and possibly even a different AC charger and you're still having problems then it could indicate a fault.

We won't be able to process a replacement if you're in a different country to where it was originally shipped but if you get in touch with our customer service guys at then they'll do everything they can to help.
Reply Report as spam Sep 21, 2014 at 9:30 PM
Son-j Laruscain
thank you. i will be in the US this week so this shoud be doable. i have high expectations of your great after sales customer service. :)
Reply Report as spam Sep 22, 2014 at 9:32 AM
lg g3 nexus 4/5 compatiblity
Does the Anker 2nd Gen Astro Pro2 20000mAh compatible with lg g3 and nexus 4/5 devices ?thanks,ariel
Replies(2) Collapse Report as spam Sep 18, 2014 at 9:23 AM

Absolutely, it'll work great with all of those.
Reply Report as spam Sep 18, 2014 at 10:30 PM
Ariel Edri
Reply Report as spam Sep 21, 2014 at 2:26 AM
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