- Size (LWH):3.74 inches, 2.44 inches, 0.79 inches
- Weight:12 ounces
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Technical Details
Product Details
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Product Description
Anker - Extend limits
Anker focuses on portable energy field, provides rechargeable batteries, chargers and other accessories for consumer electrics. Now Anker brand is associated with high performance and reliability.
Popular Compatible models
Apple: iPhone 5 (OEM cable required) / iPhone 4S / iPhone 4 / iPhone 3GS / iPod Touch Classic Nano / iPad / iPad 2 / iPad 3
HTC: One X / One S / T-Mobile Sensation 4G / Sensation XE XL / Radar 4G / EVO 3D 4G / Inspire 4G / Vivid 4G / Wildfire S / ThunderBolt / Incredible 2 S / Rezound / Desire HD S Z
Samsung: Galaxy S3 / Galaxy S2 / Verizon Galaxy S3 S III I535 / AT&T Galaxy S3 III I747 / Sprint Galaxy S3 III L710 / T-Mobile Galaxy S3 III T999 / Galaxy S II I9100 / T-Mobile Galaxy S II T989 / AT&T Galaxy S II I777 / AT&T Galaxy S II Skyrocket SGH-I727 / Sprint Galaxy S II Epic 4G Touch / Galaxy Nexus Prime / Galaxy Note / Focus S / Infuse
Motorola: Atrix 2 / Triumph / Photon 4G / Verizon Droid 3 X X2 Bionic Razr
LG: Vortex / Revolution / Quantum / Optimus V S T 2X 3D 7
Nokia: N900 / N9 / N8 / N97 / Lumia 900 800
Others: Blackberry Bold 9900 / Sony Ericsson Xperia Arc S / 3G 4G mobile WIFI hotpot / PSP / PS Vita / Nook Color / MP3 MP4 MP5 / GoPro / Amazon Kindle Fire
Note:
1. When you get the battery, you may find there are scratches on the surface of the product, which is the normal state of the protective film. Just peel it off before use.
2. Many Apple devices must detect a custom USB pin design before they will properly charge. The Anker power wire is custom designed to ensure compatibility between Anker Astro and your Apple device. Using your own wire may result in slow or even no charge. Please use the Anker power wire provided
Anker focuses on portable energy field, provides rechargeable batteries, chargers and other accessories for consumer electrics. Now Anker brand is associated with high performance and reliability.
Popular Compatible models
Apple: iPhone 5 (OEM cable required) / iPhone 4S / iPhone 4 / iPhone 3GS / iPod Touch Classic Nano / iPad / iPad 2 / iPad 3
HTC: One X / One S / T-Mobile Sensation 4G / Sensation XE XL / Radar 4G / EVO 3D 4G / Inspire 4G / Vivid 4G / Wildfire S / ThunderBolt / Incredible 2 S / Rezound / Desire HD S Z
Samsung: Galaxy S3 / Galaxy S2 / Verizon Galaxy S3 S III I535 / AT&T Galaxy S3 III I747 / Sprint Galaxy S3 III L710 / T-Mobile Galaxy S3 III T999 / Galaxy S II I9100 / T-Mobile Galaxy S II T989 / AT&T Galaxy S II I777 / AT&T Galaxy S II Skyrocket SGH-I727 / Sprint Galaxy S II Epic 4G Touch / Galaxy Nexus Prime / Galaxy Note / Focus S / Infuse
Motorola: Atrix 2 / Triumph / Photon 4G / Verizon Droid 3 X X2 Bionic Razr
LG: Vortex / Revolution / Quantum / Optimus V S T 2X 3D 7
Nokia: N900 / N9 / N8 / N97 / Lumia 900 800
Others: Blackberry Bold 9900 / Sony Ericsson Xperia Arc S / 3G 4G mobile WIFI hotpot / PSP / PS Vita / Nook Color / MP3 MP4 MP5 / GoPro / Amazon Kindle Fire
Note:
1. When you get the battery, you may find there are scratches on the surface of the product, which is the normal state of the protective film. Just peel it off before use.
2. Many Apple devices must detect a custom USB pin design before they will properly charge. The Anker power wire is custom designed to ensure compatibility between Anker Astro and your Apple device. Using your own wire may result in slow or even no charge. Please use the Anker power wire provided
What Other Items Do Customers Buy After Viewing This Item?
Customer Reviews
“ The 2A USB output charges the tablet (and my other devices for that matter) really fast; in fact, faster than any other charger I have in my house. ”
Most Helpful Customer Reviews
108 of 111 people found the following review helpful
By r.garcia
After using this battery pack for about a week, I make the following observations, in order of personal significance:
1. Build quality: The battery pack feels, in a word, solid. There is no flimsy plastic deflection if you press on it and no creaky or uneven seams.
2. Looks: The pack looks great. Yes it is a fingerprint magnet, but it also wipes cleanly to a beautiful gloss to match most smartphones out there.
3. Utility: Very versatile. One port for smartphone and most usb powered gadgets, the other higher amperage port for more power hungry devices, like tablets. I've even used this to charge AA batteries with a usb AA charger. There's nothing I've tried that this won't charge. Also has a built in led "flashlight," but more on this later.
4. Convenience: This pack will charge easily with any usb charger. Standard micro usb connector means you won't have to go searching for a special cable to plug this in and charge it. This pack will also charge as you are using it. This may seem silly if you're at home, plugging this into your computer or power supply, and your phone into the batter, but if you ever use this with a portable solar charger, as I am with the Goal 0 Zero 19010 Guide 10 Plus Adventure Kit Nomad 7 Solar Charger & 4 AA Battery USB Power Pack, then it is great to charge while the battery pack as per the available light, while still being able to charge your device with the battery pack with reserve and stable power. The led light is also very convenient. Not very bright but it's there and charged up when you need a quick light in the dark, and most importantly, so you can see your cable as you plug it into your device (great for iphone, as there really is no way to feel which side is up or down on the charger cable)
5. Support, Brand Name: Honestly I never heard of the brand name. At first glance, it seems like just an "off-brand" made in china product, and the packaging and manual even has chinese alongside english. But the packaging is attractive and not a generic box like you typically see with other generic products. While I have not yet had to call on the company for support, the quality packaging and literature would lead me to believe that this company is out to make a name for itself, and therefore would be responsive. We shall see. The instructions, on the other hand, were terrible. Very engrishy. But the product is so simple and well designed, that I didn't need the instructions.
Final observations: Again, great product, feels very solid and seems to be of high quality. No problems yet, charges everything. Worth the money.
1. Build quality: The battery pack feels, in a word, solid. There is no flimsy plastic deflection if you press on it and no creaky or uneven seams.
2. Looks: The pack looks great. Yes it is a fingerprint magnet, but it also wipes cleanly to a beautiful gloss to match most smartphones out there.
3. Utility: Very versatile. One port for smartphone and most usb powered gadgets, the other higher amperage port for more power hungry devices, like tablets. I've even used this to charge AA batteries with a usb AA charger. There's nothing I've tried that this won't charge. Also has a built in led "flashlight," but more on this later.
4. Convenience: This pack will charge easily with any usb charger. Standard micro usb connector means you won't have to go searching for a special cable to plug this in and charge it. This pack will also charge as you are using it. This may seem silly if you're at home, plugging this into your computer or power supply, and your phone into the batter, but if you ever use this with a portable solar charger, as I am with the Goal 0 Zero 19010 Guide 10 Plus Adventure Kit Nomad 7 Solar Charger & 4 AA Battery USB Power Pack, then it is great to charge while the battery pack as per the available light, while still being able to charge your device with the battery pack with reserve and stable power. The led light is also very convenient. Not very bright but it's there and charged up when you need a quick light in the dark, and most importantly, so you can see your cable as you plug it into your device (great for iphone, as there really is no way to feel which side is up or down on the charger cable)
5. Support, Brand Name: Honestly I never heard of the brand name. At first glance, it seems like just an "off-brand" made in china product, and the packaging and manual even has chinese alongside english. But the packaging is attractive and not a generic box like you typically see with other generic products. While I have not yet had to call on the company for support, the quality packaging and literature would lead me to believe that this company is out to make a name for itself, and therefore would be responsive. We shall see. The instructions, on the other hand, were terrible. Very engrishy. But the product is so simple and well designed, that I didn't need the instructions.
Final observations: Again, great product, feels very solid and seems to be of high quality. No problems yet, charges everything. Worth the money.
96 of 106 people found the following review helpful
3.0 out of 5 stars
Nice design and size but subpar charging capability, long charging time, and price inflation.
April 28, 2012
By N. Ta
Amazon Verified Purchase
Here is my unbiased review of Anker Astro 2 8400mAh external battery pack:
Charge Efficiency: Its rated at 8,400mAh as it's capacity. The lithium ion battery may have that capacity but it's ability to charge other devices isn't so hot. I understand the Anker power bank needs power of its own to operate and conversion from 3.7v to 5.0v takes energy. I wasn't expecting 100% of 8,400mAh to fully charge into other devices totaling up to 8,400mAh. But I was expecting it to be efficient. I did 5 charge and discharge cycles (though it may not be necessary on lithium batteries but I did it anyways to calibrate it) then I went on with my test to see how much it can charge my Kindle Fire, HTC Evo 3d, HTC Evo, Kindle reader, and portable speaker. Yes, the devices I were charging were completely off to preserve energy for charging only instead of also powering it on. The first charge cycle it totaled 5,425mAh (64% efficiency), 2nd is 6,032mAh (71.81% ), and 3rd is 5,280mAh (62.85%). This means ~28% - ~37% of its 8400mAH capacity is unusable. I predicted at least ~20% of 8,400mAh is powering itself which is 1,680mAh and perhaps some energy is loss through heat. I concluded that the circuitry work on it is not as good and/or the lithium ion battery isn't of "higher" grade technology (ie. Panasonic & Sanyo 18650). It fell somewhat below my expectations regarding its most important function. However, I do have an Incredicharge I-11000 with 11000mAh capacity and it is about 65-70% efficient but much bigger in size. Perhaps this is the best we can get with portable battery technology. Another alternative is to buy a high quality spare battery(ies) specifically for your cell phone as 100% of it's rated capacity will be used to power that device. Though, this is not achievable with Apple products or others without removable batteries and that this method can be expensive and impractical if you plan on buying many different batteries for various products.
Time to Charge Anker 8,400 mAh: It takes nearly 8 hours to charge with the included cord and adapter. DC input is rated at 5v/1.5amp which is good, however, the included wall adapter is only 1amp. So the charging could have been quicker if it was included with a 1.5-2amp usb wall charger. Would definitely not charge this thing via a computer (.5amp). By pointing this out it does not mean it's a pro or con since it is accurately stated under product description.
Design: Very nicely polished and sturdy case. USB ports and LED light function as described without any problems. The case is the size of a bridge sized Bicycle cards. Easily carry with you where ever. It is dense and not hollow so I would say it is high quality.
Mislabeling: At the time of ordering Anker Astro 2 I noticed it indicated the 2 USB port is rated at 1amp & 2amp. However, upon receiving the package it is clearly 0.6 & 2amp. 0.6amp is adequate for phones but that is 40% slower than 1amp. I believe another customer has pointed this out in an earlier review. It appears they have fixed this error.
Price: I purchased this mid April for $46.99 but now it is $49.99. Still not a bad deal but price inflation due to more stellar reviews isn't cool. I noticed some feedbacks were left by those who has gotten a free sample for review, could there be a correlation in price increase and demand based on reviews?. Just wanted to let you know the Incredicharge I-11000 I purchased in March went from $49.99 to $79.99 in a span of 1 month. Now I cannot even search for this product on Amazon.com anymore.
Customer Service: LaptopMate replied to emails quickly and seems very concern about customer satisfaction. Their 18 months warranty is the most of all power bank I researched.
Conclusion: Astro 2 is very convenient device that comes with plenty of adapters (btw, it doesn't come with Apple adapter so use your own). I like the idea of charging on the go but plan ahead to charge the Astro 2 as it takes very long. You can considering looking at the Powergen 8400mAh battery which is an identical replica of each other and same price but the Powergen comes with an Apple adapter. It seems like somewhere in Shen Zhen or Guandong China they make these without branding and you can get them in bulk with customization for advertisements. Ebay "Power Bank 8400mAh" and you will see plenty of clones but they have short or no warranty. I hope this review has been helpful to the readers.
Charge Efficiency: Its rated at 8,400mAh as it's capacity. The lithium ion battery may have that capacity but it's ability to charge other devices isn't so hot. I understand the Anker power bank needs power of its own to operate and conversion from 3.7v to 5.0v takes energy. I wasn't expecting 100% of 8,400mAh to fully charge into other devices totaling up to 8,400mAh. But I was expecting it to be efficient. I did 5 charge and discharge cycles (though it may not be necessary on lithium batteries but I did it anyways to calibrate it) then I went on with my test to see how much it can charge my Kindle Fire, HTC Evo 3d, HTC Evo, Kindle reader, and portable speaker. Yes, the devices I were charging were completely off to preserve energy for charging only instead of also powering it on. The first charge cycle it totaled 5,425mAh (64% efficiency), 2nd is 6,032mAh (71.81% ), and 3rd is 5,280mAh (62.85%). This means ~28% - ~37% of its 8400mAH capacity is unusable. I predicted at least ~20% of 8,400mAh is powering itself which is 1,680mAh and perhaps some energy is loss through heat. I concluded that the circuitry work on it is not as good and/or the lithium ion battery isn't of "higher" grade technology (ie. Panasonic & Sanyo 18650). It fell somewhat below my expectations regarding its most important function. However, I do have an Incredicharge I-11000 with 11000mAh capacity and it is about 65-70% efficient but much bigger in size. Perhaps this is the best we can get with portable battery technology. Another alternative is to buy a high quality spare battery(ies) specifically for your cell phone as 100% of it's rated capacity will be used to power that device. Though, this is not achievable with Apple products or others without removable batteries and that this method can be expensive and impractical if you plan on buying many different batteries for various products.
Time to Charge Anker 8,400 mAh: It takes nearly 8 hours to charge with the included cord and adapter. DC input is rated at 5v/1.5amp which is good, however, the included wall adapter is only 1amp. So the charging could have been quicker if it was included with a 1.5-2amp usb wall charger. Would definitely not charge this thing via a computer (.5amp). By pointing this out it does not mean it's a pro or con since it is accurately stated under product description.
Design: Very nicely polished and sturdy case. USB ports and LED light function as described without any problems. The case is the size of a bridge sized Bicycle cards. Easily carry with you where ever. It is dense and not hollow so I would say it is high quality.
Mislabeling: At the time of ordering Anker Astro 2 I noticed it indicated the 2 USB port is rated at 1amp & 2amp. However, upon receiving the package it is clearly 0.6 & 2amp. 0.6amp is adequate for phones but that is 40% slower than 1amp. I believe another customer has pointed this out in an earlier review. It appears they have fixed this error.
Price: I purchased this mid April for $46.99 but now it is $49.99. Still not a bad deal but price inflation due to more stellar reviews isn't cool. I noticed some feedbacks were left by those who has gotten a free sample for review, could there be a correlation in price increase and demand based on reviews?. Just wanted to let you know the Incredicharge I-11000 I purchased in March went from $49.99 to $79.99 in a span of 1 month. Now I cannot even search for this product on Amazon.com anymore.
Customer Service: LaptopMate replied to emails quickly and seems very concern about customer satisfaction. Their 18 months warranty is the most of all power bank I researched.
Conclusion: Astro 2 is very convenient device that comes with plenty of adapters (btw, it doesn't come with Apple adapter so use your own). I like the idea of charging on the go but plan ahead to charge the Astro 2 as it takes very long. You can considering looking at the Powergen 8400mAh battery which is an identical replica of each other and same price but the Powergen comes with an Apple adapter. It seems like somewhere in Shen Zhen or Guandong China they make these without branding and you can get them in bulk with customization for advertisements. Ebay "Power Bank 8400mAh" and you will see plenty of clones but they have short or no warranty. I hope this review has been helpful to the readers.
34 of 36 people found the following review helpful
By Dana Krall
Amazon Verified Purchase
I purchased the Anker Astro2 charger in anticipation of Hurricane Sandy. I knew we would likely be without power for 1-2 weeks, and needed to have a backup charger for my cell phone and iPad. After an initial charge of about 6 hours, the Anker was able to charge my iPhone 5 and my iPad simultaneously. It gave them both a full charge and had one "battery indicator light" left afterwards. I was able to get about a half charge of my iPhone after that. After fully charging the Anker a second time, I have found that it will give my iPhone 5 almost three full charges. This item was an invaluable purchase for us. We were without power and land-line telephone service for 8 days and would have been lost without it. I hope that it continues to work as well as it has so far.
Most Recent Customer Reviews
4.0 out of 5 stars
Does the job well
This is the second Anker I have purchased, as the first one died after about 1 year of use. I use it nearly daily, as I go about my business. Read more
Published 1 day ago by RedeemedBoyd
5.0 out of 5 stars
My dad uses it all of the time
I bought this for my dad to carry around for his iDevices. He says he doesn't use the wall outlet anymore, he just charges this over night when it's dead and then charges... Read more
Published 1 day ago by Sturchionix
4.0 out of 5 stars
Nice
This is a nice USB battery, solid build with two outputs, the built in LED flashlight is a nice touch.
Published 2 days ago by SimonSays
5.0 out of 5 stars
Great product, works as advertised.
I bought this product to charge/power devices on the go and it has not disappointed me. It's compact, and charges quickly.
Published 2 days ago by Valion
5.0 out of 5 stars
Still going strong
Charges my smart phone / BT headset very quickly - as fast as wall charger. Can get maybe 3 charges on phone before having to plug this back in. Read more
Published 3 days ago by G. Cantrell
1.0 out of 5 stars
Waste of money
WON'T KEEP A CONNECTION AFTER 2nd DAY OF USE!!!! The unit had been sitting on a table so it can't be anything I did to it. It charges for 5 seconds then a connection is lost
Published 4 days ago by Denny
5.0 out of 5 stars
Great Product
This thing fits in the palm of my hand so it's very portable...it charges my iphone and galaxy s3 with almost the same speed as they charge when plugged in the wall. Read more
Published 4 days ago by Joe
4.0 out of 5 stars
Does what it says and does it well.
I bought this item in order to ensure I always have a charged phone when traveling by air. I have to say that it works very well and provides a constant charge to my phone. Read more
Published 4 days ago by rr pilot
5.0 out of 5 stars
Amazing Size
Bought this for travel and it charges my Samsung s3 and iPhone without any problems. I get about 2 full charges before needing to recharge power pack. Read more
Published 4 days ago by Sol Cali
5.0 out of 5 stars
Two years and still going
Awesome product.
Charge unit before use.
If charging a phone through unit whille charging unit, make sure it is 1. Read more
Charge unit before use.
If charging a phone through unit whille charging unit, make sure it is 1. Read more
Published 4 days ago by Capt. Pickles
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