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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

  • Buy this for sure!Verified PurchaseThis review is from: Anker® 2nd Gen Astro3 12000mAh High Speed 4A 3-Port External Battery Charger with PowerIQTM Technology for Smartphones, Tablets and More (White)
  • Best investment in a long time. Charges my iPhone several times or my iPad and iPhone a couple times. Works great when I'm traveling and don't want to be held down to a wall outlet.
  • 2014-10-21

  • Charges iPhone several times
  • Wonderful piece of gadget, got three full iPhone charges on the power it was shipped with. Great, I love it!!
  • 2014-10-20

jeannine a peterson
  • Five Stars
  • Works as advertised, got about 5 phone charges,
  • 2014-10-14

Magdalena Love
  • Three Stars
  • Anker does not charge devices while I am charging the Anker - takes a long time to charge.
  • 2014-10-13

Hasan Ali Mansoor
  • I like it BUT ...Verified PurchaseThis review is from: Anker® 2nd Gen Astro3 12000mAh (4A Output) Portable Charger Triple USB External Battery Pack with PowerIQ™ Technology for iPhone 6, 5S, 5C, 5, 4S
  • I have the white version and I like this product, it does what is written, however some inner scratches and black dots started to appear on the surface of the charger even with the protection case. very disappointing
  • 2014-10-13
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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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Anker Customer Support and the Anker user community will do their best to quickly answer your question.



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Latest Post

A couple of questions...
1. Which was released later: the 2nd Gen Astro3 12000mAh OR the 2nd Gen Astro E4 13000mAh?2. Is this ( your official ebay store?3.Are your products available in Sri Lanka; maybe via an authorised seller?PS. sorry about barrage of questions, but I really want to get hold of one your batteries; hopefully :)
Replies(1) Collapse Report as spam Oct 11, 2014 at 2:53 AM

Thanks for all the questions!

1. The 2nd Gen E4
2. Yes!
3. No, we don't have a reseller in Sri Lanka but our eBay store will ship there!
Reply Report as spam Oct 13, 2014 at 12:00 AM
galaxy note pro 12.2 compatibility
Is the astro compatible with the galaxy note pro 12.2? 
Replies(2) Collapse Report as spam Sep 12, 2014 at 6:07 AM
Andrew mc
Yes the astro is compatable for the note pro 12.2 it will work perfectly fine for it
Reply Report as spam Sep 12, 2014 at 5:33 PM

Yes, it'll work with the Note Pro.
Reply Report as spam Sep 14, 2014 at 8:30 PM
Did I read the description right, will this product not work with my LG G2??
Replies(1) Collapse Report as spam Sep 11, 2014 at 6:51 PM

Yes, unfortunately that is right.

The LG G2 has unusual charging technology so it isn't compatible with a huge number of 3rd party external batteries and chargers.
Reply Report as spam Sep 11, 2014 at 8:00 PM
Awesome Anker 2nd Gen Astro3 12000mAh
This awesome external battery makes my job easier and i highly recommened it to everyone.
Replies(1) Collapse Report as spam Sep 8, 2014 at 5:26 PM

We're glad to hear you're enjoying it!

Don't forget to check out our Twitter or Facebook pages, we give out all our latest info through there.
Reply Report as spam Sep 9, 2014 at 1:30 AM
Can I buy this item from Germany?
I can see Germany on the country list, but Amazon says this item does not ship there. Which one is true? :)
Replies(1) Collapse Report as spam Sep 2, 2014 at 5:28 PM

The black version is available in Germany but we don't currently have any plans to get the white version across unfortunately.
Reply Report as spam Sep 3, 2014 at 1:30 AM
my anjer 2nd gen astro3 charges veryyyyyyy slow just showing 3 bars of light even after keeping it for 5 hours at charge 
Replies(3) Collapse Report as spam Aug 29, 2014 at 12:40 PM
How are you charging it?30% of 12000mAh is around 3600mAh which if you are charging from a PC USB port at 0.5A per hour is gonna take 7 hours ish, and off a 1A plug adapter is still 3.6 hours so this doesn't sound too slow.  It's just how long it takes to charge such a large battery. They do recommend using a 1.5A adapter as minimum.perhaps consider getting the Anker 40w 5-port charger with powerIQ which will charge at 2.1A
Reply Report as spam Aug 29, 2014 at 3:22 PM
Andy Faulkner
To charge a 12000mAh powerbank can take a long time, firstly the charger you are using can impact on charging time if the charger only has a low output, also not all cables are equal, some lose some of the power over the length, and is refered to as lossy. 
Reply Report as spam Aug 31, 2014 at 11:50 AM

Please make sure the charger you're using can charge at 5V/2A.

If it is lower than this then it may charge slowly or not at all.
Reply Report as spam Sep 1, 2014 at 1:00 AM
Ability to charge unrecognized items
Hello,My last post seems to have been deleted?  I was wondering if anyone would be able to help me.  Will the Anker Gen2 Astro3 charge items that are "not recognized" by the IQ system?  I am thinking along the lines of a GPS or maybe even an iPhone 6?Thanks
Replies(1) Collapse Report as spam Aug 26, 2014 at 3:17 PM

We did respond to this question, not sure what happened!

Yep, it'll charge basically anything which takes charge via USB. We fully expect the iPhone 6 to be compatible.
Reply Report as spam Aug 27, 2014 at 2:00 AM
Mr paul Sherman
Dear SirsI am considering either Anker 2nd Generation Astro E series or the 2nd Generation Astro 3.series but find my self going backwards and forwards between the two, unable to decide. Apart from dimensions,weight and mAh is there any technological or other difference between the two catagories, knowledge of which may help me decide.. I am in the UK in case that has relevance.ReagrdsPaul
Replies(2) Collapse Report as spam Aug 25, 2014 at 12:15 PM
Justin Rohr
Besides the size, weight, and the LED on the Astro E series. There is no functional difference otherwise with power IQ
Reply Report as spam Aug 25, 2014 at 7:55 PM

The power output is the same over both products, they both have Power IQ and will charge your devices very quickly.

The differences emerge with the 2nd Gen Astro3, it has the three USB ports and a very high potential amperage output from each port. The 2nd Gen E range have a 3A max output where as the Astro3 has a potential 4.5A to play with.

Also, it's worth considering how much weight you're willing to accept for your capacity requirements!
Reply Report as spam Aug 26, 2014 at 12:30 AM
Samsung note
Does this charges samsung note GT-N8000 
Replies(2) 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
Andrew mc
theyll charge anything that has a a usb really
Reply Report as spam Sep 12, 2014 at 5:35 PM
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
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