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Anker® Astro Slim3 6000mAh Ultra-Slim Portable Charger External Battery Power Bank with Built-in Micro USB Cable for USB Devices (Black)

by Anker
4.4 out of 5 stars  See all reviews (371 customer reviews) More about this product

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Technical Details

  • The Anker® Advantage: Join the 10 million+ powered by Amazon's #1 charging brand.
  • Fast Charging: One USB port charges the iPhone 5s at full speed and one built-in Micro USB connector charges Android devices up to 1 amp. The Slim3 recharges in 5-6 hours via the included Micro USB cable and 1 amp adapter (not included).
  • Uber-High Capacity: Add almost three charges to an iPhone 5s, one and a half charges to a Galaxy S5, multiple charges to most other phones or one charge to an iPad mini.
  • Ultra Slim: Compact design (0.47in) and flat, rubber surface make it easy to hold and stack your device on top while charging. "Hideaway" Micro USB charging connector for Android reduces cable clutter.
  • What You Get: Astro® Slim3 Portable Charger External Battery Power Bank, Micro USB cable, welcome guide, our fan-favorite 18-month warranty and friendly customer service.

Product details

  • Product Dimensions: 13.4 x 7 x 1.2 cm ; 231 g
  • Boxed-product Weight: 259 g
  • Delivery Destinations: Visit the Delivery Destinations Help page to see where this item can be delivered.
    Find out more about our Delivery Rates and Returns Policy
  • Item model number: AK-79AN7909-B2A
  • Date first available at Amazon.co.uk: 18 April 2013
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (371 customer reviews)

Product Description

ANKER: Amazon's #1 Charging Brand

• The highest average review rating of any charging brand.
• One in three chargers sold on Amazon is from us.
• Join the 10 million+ satisfied customers powered by Anker.

Astro Slim3 Portable Charger External Battery Power Bank
Mobile power that stacks up - literally.

Fast Charging
Charge an iPhone at full speed via the USB port and Android devices at speeds of up to 1 amp through the built-in Micro USB charging cable.

Built-in Micro USB
For Android and other Micro USB devices, leave your cords at home and charge up with the Slim3's handy "hideaway" connector.

Uber-High Capacity
Packed with power, charge an iPhone 5s three times, a large capacity phone like the Galaxy S5 over one and a half times or an iPad mini once.

Slim & Stackable
Specially designed to suit a 4.7in smartphone. Just stack your device on top and enjoy uninterrupted use while charging.

World Famous Warranty
At Anker, we believe in our products. That's why we back them all with an 18-month warranty and provide friendly, easy-to-reach support.

For Optimal Use:
• Use the included cable, your original cable or a third-party certified one (such as MFi).
• Compatible with Apple and Android smartphones, tablets (including the Nexus 7) and other USB-charged devices except for the iPod nano, iPod Classic, HP TouchPad, LG G2, Asus tablets and some GPS and Bluetooth devices. The built-in Micro USB connector may not work with thicker bumpers or cases.

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews
3 of 3 people found the following review helpful
4.0 out of 5 stars it really does hold its juice. 16 Jan. 2014
By RnB
Size Name:6000mAh
Pros; Good looking piece of kit, well made, very portable, super fast charge with on board cable, good delivery (traceable) and well packaged, gives my Xperia S three full charges.
Cons; it takes a long long time to fully charge (Zzzzzzz), it does get hot when charging phone (with on board able), no case.
Summary-I do like it, to be honest I can't do without it. However, due to the Cons it gets 4 stars
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1 of 1 people found the following review helpful
By wietske
Size Name:6000mAh|Verified Purchase
I own another ANKER product and was so impressed by it that I had to buy another one. This product was actually for the use of my husband as he travels a lot and uses his phone a lot on the go. This mobile charger is very light and easy and what makes it so great is the fact that it doesn't have any fiddly bits. The cable is attached to the charger and it is so sleek and easy to use!!! Initially we had a problem with the charger as it didn't charge our phones to 100% (only to 91%). I contacted the customer services and let me tell you - every review you have read before mine which commented on the customer service is absolutely right. ANKER has the best customer service that I have encountered in a long time!!!! They answered my complaint email within 12 hours and they dispatch me a new item within a day. The representatives are really friendly and genuinely seem to care and help. It is a shame we had a little trouble with the product at first, but since we received the replacement we have been happy chargers! No complaints and the charger is working its magic now. I cannot recommend this product enough - GET IT, YOU WON'T BE SORRY!
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1 of 1 people found the following review helpful
5.0 out of 5 stars My top purchase for travelling! 23 May 2014
By James
Size Name:4500mAh|Verified Purchase
I have just returned from a 5 month trip with this device and I must say it was one of the best things that I bought!

Never once was I left stranded in the middle of no where or at an airport with no battery. The two things that provided value for me were the form factor; it is similar in dimension to my phone which means I can have both together in one pocket. Sure there are higher capacity powerbanks but they are also not as pocketable.

The second is the short micro USB that is ingeniously integrated into the device. This means that unlike other powerbanks, you don't need to carry a long cable around with you (there is also a standard USB socket)

I bought the 4600mAh version... I feel that if I were to buy again I would opt for the higher capacity model as its the same size only with more juice.

Overall, great design, great functionality and a must buy for when on long travel journeys IMO.

Just a little pro-tip; A rubber silicone case for the Moto G phone fits this device like a glove if you want a bit of bump protection.
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30 of 35 people found the following review helpful
5.0 out of 5 stars Compact, Portable and Long Life Battery.... 11 Sept. 2013
By Dario
Size Name:6000mAh
I was supplied a sample for test and evaluation, and I promised that my review is fair and honest.

The product is aesthetically very nice and well done. It is accurate in all its details, and it is pleasant to the touch. It is very thin and it has the dimensions of a Samsung Galaxy S4. It has similar height, width and thickness. It is just a little bit heavier nut the weight is very light and everything is in favor of portability. You can easily carry with you in your pocket like a mobile phone without any problem.

The very simple package includes: the battery Slim3 of course, a little manual, a cable usb-microusb (pretty short, about 30cm) for charging and an 30pin adapter for iphone 3gs/4/4s (it only works for charging and not to synchronize). It has also a built-in and not removable micro usb cable that is very useful if you have a device that need a microUSB connector to be charged, a little less in other case, such as an iphone, because then you will need to connect an adapter. There is also a second USB port where you can connect, for example, or a second device to charge it simultaneously, or to connect the cable for iphone 5, for those who haven't an adapter or simply to connect a longer cable. Missing a bag to carry, not the battery because it is pocket size, but to bring the usb cable and the adapter.

It is extremely easy to use. You connect the built-in cable or a usb cable to the secondary port to a device, and without pressing any button, it starts the recharge. At the end of the recharge, the battery is automatically turns it off so to not consume and discharge the battery. It is equipped with 4 LEDs that indicate the state of charging of the battery while it is charging a device and when it is recharging itself.
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15 of 18 people found the following review helpful
5.0 out of 5 stars Nicely designed product 20 Aug. 2012
By mwarner
Size Name:3200mAh White|Verified Purchase
I contemplated a number of products before finally deciding on the 3200mAh Anker. I intend this to provide my phone with extra charge whilst out walking & using the phone as a GPS - I tend to find that after 5-6 hours of this kind of heavy use my phone runs out of juice!

My requirements were:

1. Able to provide roughly one full charge of my Samsung Galaxy Note (2500mAh battery)
2. To be slim enough to not really notice you are carrying it in a pocket (thickness is more important than width and height here). I compared it to an iPhone 4S and it is slightly shorter, but pretty much the same width and depth.

I also liked the following about this item:

1. It had a built-in light, which I will actually find quite useful
2. It had a built-in Micro USB cable, making it more compact than having to carry around a separate cable.
3. The price was very reasonable

Once in hand, I was impressed with it's build quality and weight and, comparing it to my workmate's 5000mAh I was pleased I ordered the lower capacity version - mostly due to the excellent form factor.

Today I decided to perform a test to see how efficient battery to battery power transfer is. I ran my phone down until it asked for power & charged it until the (fully charged) extended battery ran out of juice.

The recharge took 3 hours and took the phone from 16% to 87% battery before running out of power. The phone was on during this time - the previous 3 hours had used 16% battery, so I assumed that the battery usage over the charge period would be the same.
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Most Recent Customer Reviews
2.0 out of 5 stars The attached USB charging cable broke, however Anker did ...
The attached USB charging cable broke, however Anker did replace the product with the new version and let me keep this one too.
Published 6 days ago by James P King
5.0 out of 5 stars it work's great. charge quite fast any device
this is the third time that i bought anker slim 3, now for my family and friends. it work's great. charge quite fast any device. Read more
Published 8 days ago by Dawid
3.0 out of 5 stars Very nicely built, and feels like a quality product
Very nicely built, and feels like a quality product.
I have noticed the performance dropping though within 6 months of use - it no longer charges my phone fully twice.
Published 11 days ago by Jet
5.0 out of 5 stars Small, portable and easy to use
Small, portable and easy to use. The built in cable is incredibly useful as I don't have to carry loose cables around as well and is generally much neater. Read more
Published 24 days ago by Robert Blenkinsopp
1.0 out of 5 stars Gave it away
Charged my phone twice very fast then destroyed the Samsung battery
Published 25 days ago by Andrew C. Middleton
4.0 out of 5 stars Four Stars
OK but strange design
Published 29 days ago by Mr A J W STENNING
5.0 out of 5 stars Five Stars
excellent product, fast shipping
Published 1 month ago by George Panayi
3.0 out of 5 stars Build quality good. Takes a while to charge
Build quality good. Takes a while to charge. Instructions recommend that you unplug the battery once it has charged to prolong battery life.
Published 1 month ago by N. Wood
2.0 out of 5 stars The attached micro-usb cable is a letdown
The battery is really slim and it looks really nice but it is letdown by the fact that the micro-usb cable that it is attached to the battery doesn't work. Read more
Published 1 month ago by MANUEL PEREZ GONZALEZ
2.0 out of 5 stars Two Stars
Did not charge well.
Published 1 month ago by Sinan Unlu
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