Your Position: Home > External Batteries > 2nd Gen Astro >

Anker 2nd Gen Astro3 12000mAh External Battery Charger with PowerIQ™ Technology

Anker 2nd Gen Astro3 12000mAh External Battery Charger with PowerIQ™ Technology


Product Description

The all-new 2nd generation Anker® Astro3 recasts the possibilities of mobile power.

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.

Packed with power.

We figure, the more power, the better. Packed with 12000mAh of juice, and featuring an energy efficiency rate 10% above previous generation Astros and many current standard alternatives, the new Astro3 charges the iPhone six times and large-capacity phones like the Galaxy S4 almost four times.

Double take.

Chic and minimalistic, the new Astro3 may feel reserved at first. But, a friendly "shake" reveals its warm inner light to display the power level or begin your charge. Generous, cool, and delightfully intuitive, the new Astro3 is perfect for your next adventure, or just the daily grind.

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 Reviews

  • GREAT!
  • This thing is efficient, reliable and charges quickly. Love it.
  • 2014-08-19

Noel J.
  • Powerful and compact
  • I like that it has 3 outlets for charging all my stuff at once, and I don't have to worry about which port to use with my phone or tablet. It was actually a little smaller than I expected, and can fit in a big pocket.
  • 2014-08-18

Karisma Smith
  • and durability so far are excellent though.
  • Takes awhile to charge, and gets a little hot when charging. The convenience, lifespan between charges, and durability so far are excellent though.
  • 2014-08-16

Regina Rodriguez
  • Five Stars
  • Works wonders!
  • 2014-08-11

McHenry Diaz
  • Great product!
  • Bought this as a gift for my niece and it works great!
  • 2014-08-08
<< < 1 2 3 4 5 6 7 8 9 10 > >>

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.

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.



Please enter the verification code - humans only!*


Latest Post

Samsung note
Does this charges samsung note GT-N8000 
Replies(1) Collapse Report as spam Aug 19, 2014 at 4:32 PM

Yep, they'll work well together.
Reply Report as spam Aug 20, 2014 at 3:00 AM
Hi Please advice urgant
why do u recommend and why , Anker 2nd Gen Astro3 12000mAh or Anker Astro E5 15000mAh ??
Replies(1) Collapse Report as spam Aug 19, 2014 at 1:53 AM

It all depends on what you need the battery for!


- Larger Capacity
- A little smaller
- Flash light and on/off button

2nd Gen Astro3:

- 3 USB Ports
- Power IQ
- Shake-to-wake
Reply Report as spam Aug 19, 2014 at 3:30 AM
Best battery i've ever owned
I've owned a ton of batteries and this is, without a doubt, the best external battery I've ever owned. I have a Nexus 5 and I can get 4 FULL charges out of this battery before it dies. Extremely effecient power transfer. I also have a Nexus 7 and an LG HBS 800 bluetooth headset. Last time I traveled I ran out of power on all three. I plugged all three in and charged them to 100% and was only a 1/3 power drain meaning I was still at 70% on my Aker. Brilliant product. Will buy another.
Replies(2) Collapse Report as spam Aug 18, 2014 at 9:15 AM

Glad to hear you're enjoying it and that we've made your smart life easier!
Reply Report as spam Aug 18, 2014 at 11:00 PM
Great to hear!
Reply Report as spam Aug 18, 2014 at 8:53 PM
User Manual - Request Please...
Hello Anker Support,Now granted the device is easy enough to use, but I'd like to have a copy of the User's Manual on my phone (makes sense doesn't it?). But the issue is, your UMs are in JPEG format and not easy to use on the phone due to picture enlargment restrictions. In fact I tried attaching the JPEG to an two different emails from two different accounts (to then save to my phone) and it did not play well.Please just simplify things by making your UMs available as PDF files so a user can "enlarge" the instructions, text, illustrations. I'm aware of issues with PDF from a security prospective, but let me have the choice.Thank you, 
Replies(1) Collapse Report as spam Aug 16, 2014 at 3:36 PM

Sorry to hear that the JPEGs are an inconvenience to you, we'll look at getting them updated with some PDFs.
Reply Report as spam Aug 18, 2014 at 2:00 AM
Good battery - less impressive cable
The battery is fine but the USB cable provided is less so. The outer coating is quite stiff and the little sleeve covering the wires entering the big USB plug has split within one week of using it.The advantage of having an external battery is being able to charge your phone on the go, i.e. with the battery in your pocket being moved around quite a lot and the phone in your hand. The stiffness of the cable and the near constant tugging of handling the phone with the battery in the pocket has split the rubber sleeve, exposing the wires. As a solution I bought a braided cable from a third party - it might not have the famed super thin gauge for super fast charging but it is flexible enough for everyday handling and has not come apart yet after some months of heavy usage.Wouldn't it be nice to provide a battery that is so eminently useful on the go with a cable that can survive being handled rather than just being left sitting undisturbed on the side?Just a thought...
Replies(1) Collapse Report as spam Aug 16, 2014 at 6:25 AM

We do take our quality control very seriously and so we're sorry to hear that you got supplied with a defective one.

If you give our customer service guys a shout at then they'll be able to compensate you for it.
Reply Report as spam Aug 17, 2014 at 11:00 PM
Nook HD Plus
Is this the right product for the Nook HD Plus? I understand the Nook does not work with some external batteries. Thanks in advance.  Gary
Replies(1) Collapse Report as spam Aug 12, 2014 at 3:39 PM

Yep, this'll work fine with the Nook HD +.
Reply Report as spam Aug 13, 2014 at 3:00 AM
GPS "TomTom"
Madame, Monsieur,J'aimerais savoir si le Anker 2nd Gen Astro3 supporte la charge d'un GPS Tomtom start .Merci d'avance.
Replies(1) Collapse Report as spam Aug 5, 2014 at 5:19 PM

En réponse à votre question, nous vous confirmons que notre Batterie Externe Anker 2nd Gén. Astro3 12000mAh est compatible avec un GPS Tomtom Start.
Reply Report as spam Aug 6, 2014 at 2:30 AM
Hi, I bought this device to use it in the library while Im out of charge for my devices. Although it takes at least 10 hours for this device to be charged , but it will give you a lot juice for your electronics devices. To be honest, so far, this is the the only device that can charge my note 10.1 among other power banks that I bought. If can charge my I pad 2 2.5 times from 5 percent to 100 . It has a nice LED that indicates the amount of charge that left. By shaking it , it will show you the amount of charge that remained in it. The body is made of sturdy plastic material and the white color one is so gorgous.It came with a nice pouch. I use the Pouch for my other stuff too.
Replies(1) Collapse Report as spam Jul 29, 2014 at 12:02 PM

If you use a charger that can output 5V/2A then it should charge in as little as 6 hours!
Reply Report as spam Jul 30, 2014 at 1:00 AM
Max output current per port?
I see total output capacity over all ports is 4a but what is the maximum output current possible for a single port?  Specs on Amazon say that a single port will output up to 4a but this would be the first pack I've seen capable of such current.  
Replies(1) Collapse Report as spam Jul 25, 2014 at 2:35 PM

That is correct, one port can output 4A.
Reply Report as spam Jul 28, 2014 at 12:00 AM


Do the Astro3 and Astro E3 support charging a Z10 and Torch?
Replies(1) Collapse Report as spam Jul 21, 2014 at 11:16 AM
<< < 1 2 3 4 5 6 > >>

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.