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Anker 2nd Gen Astro E4 13000mAh 2-Port (3A Output) Fast Portable Charger External Battery Power Bank with PowerIQ Technology for iPhone 6 Plus 5S 5C 5 4S, iPad Air 2 Mini 3, Samsung Galaxy S6 S5 S4 Note Tab, Nexus, HTC, Motorola, Nokia, PS Vita, Gopro, more Phones and Tablets (Black)

4.7 out of 5 stars 2,994 customer reviews
| 336 answered questions

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  • The Anker Advantage: Join the 10 million+ powered by Amazon's #1 charging brand.
  • Exclusive PowerIQ Technology: Detects your device to deliver its fastest possible charge speed up to 3 amps
  • Huge Capacity: Charges the iPad Air once, the Galaxy S5 over three times, the iPhone 5s almost six times and other smartphones multiple times. Recharges in 6.5 hours with a 2 amp adapter (not included) and the included Micro USB cable.
  • Superior Quality: Premium LG cells, cutting-edge circuitry and a sturdy gloss exterior ensure reliability and safety. To activate the LED flashlight, hold or double click the power meter button.
  • What You Get: Anker 2nd Generation Astro E4 Portable Charger ?External Battery Power Bank, Micro USB cable, travel pouch, welcome guide, our fan-favorite 18-month warranty and friendly customer service.

Product details

  • Product Dimensions: 15 x 6.2 x 2.3 cm ; 295 g
  • Boxed-product Weight: 363 g
  • Delivery information: We cannot deliver certain products outside mainland UK ( Details). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout.
  • Batteries 1 Lithium ion batteries required.
  • Item model number: AK-79AN13K2-BA
  • Date first available at 10 Mar. 2014
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (2,994 customer reviews)
  • Amazon Bestsellers Rank:

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.

2nd Generation Astro E4 Portable Charger ?External Battery Power Bank
Supersized power in the palm of your hand.

PowerIQ Detects your device. Delivers the fastest charge.
Exclusive to Anker, PowerIQ amp-adjustment technology intelligently identifies your device to deliver its fastest possible charge.

Huge Capacity
Enough power to keep you going for days. Charge an iPhone 5s almost six times, a Galaxy S5 over three times or an iPad Air once.

Slimmer, Sleeker
The new E4 weighs under a pound and rests nicely in your palm. Press the button to check your power level or hold to activate the flashlight.

Superior Quality
We use only premium LG battery cells, together with the most advanced materials and cutting-edge technology, to ensure complete safety.

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, Dell Venue 11 Pro, Asus tablets and some GPS and Bluetooth devices.
• Remove film before use.

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Verified Purchase
I was very impressed with this charger. It charged up multiple phones quickly and many times, is well designed and made, and Anker's approach and ethos are very refreshing.

I bought this to take on holiday with me, as we were going to be travelling quite a lot and I wanted something that could keep my phone charged up if I couldn't get to a plug (I did NOT want to lose my music and films 2 hours in to an 18 hour long-haul flight!) This baby was a life-saver. I reckon I could fully charge my phone from absolutely dead almost 4 times before the unit needed charging.

What was more impressive than that was the speed it charged - I could almost see the percents ticking up as I watched! You might think that a phone will charge at the same rate regardless of how it's plugged in, but that isn't so. Sometimes different chargers are lower powered, and sometimes they just don't speak the same language as the device being charged. Anker use something they call PowerIQ to identify the device plugged in and charge it at the optimum rate. Clever stuff. I can safely say that this charged my phone FASTER than the wall charger that the phone came with. I'm considering using it at home as well as travelling!

The best thing about it is its portability. You can plug your phone in, leave them both in your bag for the 20 minutes it takes to transfer at a bus station (when you're too busy trying to work out the timetables/terminals/tickets/toilets to be using it anyway) and your phone is well on it's way to being charged again.

It was useful having 2 USB ports, as both me and my girlfriend could charge at the same time. Plugging 2 phones in does make the charging a bit slower, but not by much.
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By Bob the B TOP 100 REVIEWERVINE VOICE on 13 May 2013
Anker gave me this product free to test so that I can give my honest feedback.

I have had a number of Anker products to review recently and I have rated them all as 5 star products. This item is a brilliant idea, it is in essence a rechargeable battery that charges other items, such as my Android phone. The product is quite small and relatively lightweight given the capacity of its charge. It is made from quality black plastic, with a chrome casing around the outside, which makes it look and feel superb. There is a chrome button which turns the unit on and off and also switches the internal LED flash-light on and off. Above the button are 4 blue LED lights which indicate the amount of charge left in the unit. There are 3 outlets, 2 USB ports and one Android/Phone charging port. To use you simply charge the unit using a USB port and then use the included cable to charge the item you want to charge such as a phone. On my test, I charged my Sony Xperia phone from empty to 100% charge in 1 hour 20 minutes, so equating to almost the same charge rate as plugging it into a socket. This charge also hardly dissipated the internal battery of the unit. I think the units' battery once fully charged, will allow 7 full charges of my mobile phone, giving the unit an enormous capacity.

I am very impressed by the unit and how it looks and the quality of its construction. As always the item is backed by Anker's 18 month warranty and helpline. For the first time with an Anker product I have two minor concerns. Firstly the instruction book is far to small and was difficult to read. Secondly the On/Off switch can be turned on too easily, resulting in the LED torch illuminating and so discharging the battery.
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2 Comments 234 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Length: 5:00 Mins
The Astro is a rechargeable 13,000mAh battery unit that can then be used to charge a slave device connected to it via USB. Included in the package is the Power Bank, micro USB cable, user manual, and travel pouch.

Because this is billed as MFI certified, it ships with a lightning cable for recent iOS devices which is a nice addition. This is black to match the Astro and well constructed - it certainly compares to the official cable and has no issues with charging or syncing.

The Astro measures in at 15 x 6.2 x 2.3 cm and 295g. It feels sturdy in the hand, in part due to the weight of the internal battery and also thanks to the good construction on offer. The unit does have a smooth all over finish though so be wary of placing this somewhere it may slide.

It features four LEDs on the top to indicate remaining power and a power button on one side to enable the remaining power indicator or to operate the LED torch function which is a handy feature that is creeping into more and more power banks. On the end it has two full sized USB ports as well as a central micro USB port for recharging which sits just above the LED torch. It takes around 6.5 hours to fully recharge the unit from empty using a 2A charger. There is no supplied charger but the included cable or indeed any other micro USB cable can be used in connection with any USB source.

From a full charge, 13,000 mAh of portable power is on offer. To put this in an IOS perspective, an iPhone 6 rated @ 1,810 mAh could be fully charged around 7 times. An iPad mini @ 4,490 mAh could be charged almost three times while a full sized iPad Air 2 @ 7,340 mAh could be charged 1.7 times.
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