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  • Anker 2nd Gen Astro2 9000mAh External Battery Charger with PowerIQ Technology for iPhone 5S, 5C, 5, 4S, iPad Air, mini, Galaxy S5, S4, S3, Note 3, Galaxy Tab 3, 2, Nexus, HTC One, One 2 (M8), MOTO, LG Optimus, PS Vita and other Smartphones and Tablets (Black)
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Anker 2nd Gen Astro2 9000mAh External Battery Charger with PowerIQ Technology for iPhone 5S, 5C, 5, 4S, iPad Air, mini, Galaxy S5, S4, S3, Note 3, Galaxy Tab 3, 2, Nexus, HTC One, One 2 (M8), MOTO, LG Optimus, PS Vita and other Smartphones and Tablets (Black)

by Anker
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Price: $79.99
Sale: $36.99 & FREE Shipping. Details
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  • PowerIQ™ technology maximizes compatibility with Android, Apple or other devices by enabling charge speeds of up to 3 amps overall or 3 amps per port.
  • 9000 mAh of capacity and an energy efficiency rate 10% above previous generation Astros and many current standard alternatives charges the iPhone four+ times and large-capacity phones like the Galaxy S4 almost three times.
  • A "shake" starts a charge or displays the remaining power level. The ultra-low power consumption (100000 shakes consume less than 1%) 10-LED power meter balances accuracy and aesthetics.
  • Sturdy construction and matte finish withstand bumps and drops. Grade A cells and premium chips ensure reliability. Input: 5V / 1.2A; Use a 1.2A adapter (not included) with the included USB cable for the fastest charging time (8 hours).
  • Package contents: Anker? 2nd Generation Astro2 External Battery, webbed travel bag, micro USB cable, welcome guide, 18-month hassle-free warranty. (Apple adapters, 30 pin and lightning, Samsung 30-pin adapter not included).
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Frequently Bought Together

Anker 2nd Gen Astro2 9000mAh External Battery Charger with PowerIQ Technology for iPhone 5S, 5C, 5, 4S, iPad Air, mini, Galaxy S5, S4, S3, Note 3, Galaxy Tab 3, 2, Nexus, HTC One, One 2 (M8), MOTO, LG Optimus, PS Vita and other Smartphones and Tablets (Black) + Anker® 2nd Gen Astro 6000mAh (2A Output) Portable Charger External Battery Pack with PowerIQ™ Technology for iPhone 5S, 5C, 5, 4S, iPad Air, mini, Galaxy S5, S4, S3, Note 3, Galaxy Tab 3, 2, Nexus 4, 5, 7, 10, HTC One, One 2 (M8), MOTO X, G, LG Optimus, PS Vita and other Smartphones and Tablets + Anker® 2nd Gen Astro3 12000mAh (4A Output) Portable Charger Triple USB External Battery Pack with PowerIQ™ Technology for iPhone 5S, 5C, 5, 4S, iPad Air, mini, Galaxy S5, S4, S3, Note 3, Galaxy Tab 3, 2, Nexus 4, 5, 7, 10, HTC One, One 2 (M8), PS Vita and other Smartphones and Tablets
Price for all three: $108.97

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Technical Details

  • Size (LWH): 4.72 inches, 3.54 inches, 1.18 inches
  • Weight: 8.8 ounces
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Product Details

  • Product Dimensions: 4.7 x 3.5 x 1.2 inches ; 8.8 ounces
  • Shipping Weight: 8.8 ounces (View shipping rates and policies)
  • ASIN: B00DMWV3EU
  • Item model number: AK-79AN7903S-BA
  • Average Customer Review: 4.6 out of 5 stars  See all reviews (791 customer reviews)
  • Amazon Best Sellers Rank: #1,366 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories)
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Product Description

The 2nd generation Anker® Astro2 recasts the possibilities of mobile power.

PowerIQ™: 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 9000mAh of juice, and featuring an energy efficiency rate 10% above previous generation Astros and many current standard alternatives, the new Astro2 charges the iPhone four+ times and large-capacity phones like the Galaxy S4 almost three times.

Double take.
Chic and minimalistic, the new Astro2 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 Astro2 is perfect for your next adventure, or just the daily grind.

For optimal use.
• Please use the included cable(s), 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.
• The included Micro USB cable is compatible with the Samsung Galaxy S5, Note 3 and other Micro USB 3.0 devices. To connect, insert the cable's Micro USB tip into the larger of the two connection ports on your device.

Customer Questions & Answers

Customer Reviews

The charge works quickly.
Gary F.
This battery does a great job of keeping my phone charged when I'm away from an outlet.
Mike Banducci
It's very sleek and it can charge my iPhone 4-5 times or my iPad 2-3 times.
K. S. Bowen

Most Helpful Customer Reviews

Length: 6:00 Mins
This review is on Anker Astro 2 second generation 9000 mAh black battery pack. This battery pack is a real powerhouse of energy and in my test results it performed extremely well in supplying a charging current to an iPad 2 and an iPhone 4. It is also designed to allow you to charge two items at the same time. I also tested the battery pack charging and iPad 3 and an iPhone 4 simultaneously. It comes with an Apple 30 pin connector and other accessories that you need to make it more useful. You may need to use your original charging cables for some devices so take them with you if you need them.

It is a great power resource to keep your USB recharged devices operating on those long work or school days or while you are traveling. This battery pack is a powerful source of power and many people like me are power users of their smart phones and tablets and need a battery like this. If you are constantly using your phone or tablet then you know that they will run out of power sometime during the day or evening. If you are not near an AC wall outlet with your charger or in your car with a charger what can you do? It is especially important to have some way to recharge if you are traveling in a plane, in the middle of a school classroom or on a bus or train. In addition many of the newer tablets are real power hungry devices and it takes a lot to recharge them.

Here is a powerful battery pack with two USB ports. It can charge your tablet devices or charge your smart phone and if you want it can do both of them simultaneously. I charged two iPhones at the same time in my testing. One Smart USB output port is rated at 5 VDC and 2.4 Amps and the other one is rated at 5 VDC and 3 Amps. It uses Lithium-Ion battery technology and carries a 9000 mAh capacity.
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27 of 31 people found the following review helpful By H. A. on September 16, 2013
Verified Purchase
I have been using my iPhone as a GPS with the Gaia GPS app while I have been in the backcountry, and decided that an external battery was a must for extended trips. I also decided that I wanted a backup battery for our iPad when we travel with our kids. I had a hard time deciding what mAh rating I needed, but wound up deciding to go with 9,000 because it will charge my iPhone 4s six times (the 4s has a 1,432 mAh battery) and my gen 1 iPad nearly twice (5,400 mAh).

After looking at all sorts of batteries and reviews on Amazon I decided to call Anker's customer service number to try to get a recommendation. I wasn't expecting much, but was very pleasantly surprised when I reached a U.S. based customer service representative who was extremely helpful. She discussed the pros and cons of the various models I was considering, and wound up recommending the Astro2. About a week after my purchase I even received a follow-up e-mail from Anker letting me know that they are always available to provide support which just capped off a level of customer service that is rare today.

The battery itself appears to be very well made. It has a nice rubberized coating and comes in a padded mesh bag. The included micro USB cable and 30 pin adapter work well with my iPhone 4s, but those with Lightning devices will have to use their own cable. It is a about the diameter of a pack of cards but a little thicker, and has no buttons. The led charge indicator is not visible unless you shake the battery to wake it up, and is in the form of a segmented ring. All in all I like the design very much.

I would recommend this to someone with needs similar to mine, or would recommend other Anker models to those with different external battery needs based upon the quality of the products as well as customer support.
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40 of 50 people found the following review helpful By Daniel G. Lebryk TOP 50 REVIEWER on August 27, 2013
The Anker Astro2 battery is a decent battery with a nice form factor and a soft exterior. The battery capacity (9000 mAh) is on par with others of this size. It includes an interesting accessory I like a lot.

In the world of battery packs, it is the little things that separate these devices. The first thing to look at it is capacity and price. This is a 9000 mAh battery in a medium sized package. That capacity is pretty good, but not remarkable. I was able to charge my first generation iPad from completely dead to 100%. There was no more battery capacity left to charge anything else. Given charging efficiencies and the energy required to get to a 100% charge, this is exactly what I would expect from this battery). In other words, the battery pack's full tank of gas is a 1st or 2nd generation iPad (about 7000 mAh battery. Newer iPads will get less capacity. The estimate of three iPhone charges (the iPhone battery is more or less the same size across the board) is pretty good. The slippery slope is price, $45 at this time is a little bit on the expensive side for this much capacity. There are battery packs that include more features, maybe a little less capacity, are more compact, and are less expensive.

I like the shape of this battery pack. The rounded sides are nice. The rubberized material it is coated with is nice. There is no on / off switch, the battery pack is essentially always on. There are two USB ports cryptically labeled Smart and Universal. The Smart port is used for high amperage devices like an iPad. The battery does charge my iPad at the high charge rate (this is a very good thing, not all battery packs do this). For an iPhone you can use either port. The unit is charged with a micro USB plug. It took a very long time to charge using a MacBook Pro port.
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