Anker Astro E4 13000mAh External Battery Charger Power Bank for Apple: iPad mini, iPhone 5 (Lightning Cable not Provided); iPhone 4S, iPad; Android Tablets: Google Nexus 7 Nexus 10; Android Smart Phones: Samsung Galaxy S4, S3, S2, Galaxy Note II; HTC Sensation, One X V S, EVO 4G, Thunderbolt; Nokia Lumia 920 900 N9; Motorola Razr; Blackberry Z10; Sony Xperia Z [3 mobile phone connectors] - Black special offers

Anker Astro E4 13000mAh External Battery Charger Power Bank for Apple: iPad mini, iPhone 5 (Lightning Cable not Provided); iPhone 4S, iPad; Android Tablets: Google Nexus 7 Nexus 10; Android Smart Phones: Samsung Galaxy S4, S3, S2, Galaxy Note II; HTC Sensation, One X V S, EVO 4G, Thunderbolt; Nokia Lumia 920 900 N9; Motorola Razr; Blackberry Z10; Sony Xperia Z [3 mobile phone connectors] - Black

Anker Astro E4 13000mAh External Battery Charger Power Bank for Apple: iPad mini, iPhone 5 (Lightning Cable not Provided); iPhone 4S, iPad; Android Tablets: Google Nexus 7 Nexus 10; Android Smart Phones: Samsung Galaxy S4, S3, S2, Galaxy Note II; HTC Sensation, One X V S, EVO 4G, Thunderbolt; Nokia Lumia 920 900 N9; Motorola Razr; Blackberry Z10; Sony Xperia Z [3 mobile phone connectors] - Black Reviews

This battery pack is beautifully packaged with white case with a silver band around it. It is a powerful battery pack rated at 13,000 mAh of capacity and capable of charging two devices simultaneously. I put together a video of the unit and the test results for your review. The white exterior shell looks fantastic and does not show fingerprints. The battery weighs in at 10 5/8 ounces. The battery pack has two USB output ports that output 5 VDC at 1 Amp and the second one outputs 5 VDC at 2 Amps. This is ideal to allow you to charge two devices at the same time and one of them can be a tablet. During the testing the temperature of the battery pack never even exceeded ambient room temperature. To start your device charging you connect it with the proper cable and press the battery pack's power button and charging starts. The charging will stop automatically when your device is fully charged or the battery pack is depleted. This battery pack also features a LED flashlight built in that can stay on for up to 600 hours when the battery is fully charged. This is ideal for when you travel to have an emergency light in a hotel room, when looking for your keys or when in a dark movie theater. This product is very good and I rate it at 5 stars. I was able to get 75.5% of the battery's rated capacity out of it in my testing and that is very good. If you are a business person or a student and have to depend on your tablet or smart phone for long periods of time without the ability to get to an AC power source then this is a good battery to own. This is good for those who travel a lot or camp out. Now you can watch your movies or listen to your music on those long airline flights. You should note that I did not operate my devices while I charged them but the iPhones were on, connected to the wireless supplier's towers and in all cases the devices WIFI was active. Items in the box: * The Anker 13000 mAh battery * The battery pack comes with an instruction manual * A USB to round pin charging cable that is 27 inches long * Three different phone adapters * It does not come with an AC wall charging adapter. Anker Astro E4 13000mAh External Battery Charger Features: * There are two USB power output ports and they are USB 1 rated at 5VDC at 1 Amp, USB 2 rated at 5VDC at 2 Amp for iPads and tablets. * Press the ON button when you plug in a device and that begins the charging process of your device. There is an automatic OFF when your electronic device is charged. * The battery pack uses Lithium-Polymer battery technology * The battery pack can be recharged 500+ times * Warranty is 18 months * Powerful 13000 mAh capacity * The unit is compact and weighs in at 10 5/8 ounces. * Attractive design with nice white exterior and surrounding silver band * It has 4blue LED status lights located on the side that indicate the battery charge level. One LED flashing means 0 to 5%, one LED on and the second one flashing means 5 to 25%, two LEDs on and the third flashing means 25 to 50%, three LEDs on and the fourth blinking means 50 to 75% four LEDs on means 75 to 100%.. * When pressing the power button or charging a device the LEDs light showing the amount of power still stored in the battery pack. * The battery pack does not come with an AC wall charger. * Charging it with a USB 2.0 port on your laptop or computer is not recommended by me as the battery would take too long to fully charge. (Approximately 26+ hours with a 500 mAh USB 2.0 Port.) * It will take 13+ hours minimum to charge the battery pack with a 5 VDC USB rated at 1 Amp. * The battery pack can output 3 Amps max at one time so it can charge two devices simultaneously. * The unit has a LED flashlight that can be turned on by quickly double pressing the power switch. It can be on for up to 600 hours continuously. You turn it off by double pressing the power switch again. Charging my devices: I charged the battery pack fully before I started my test. I started with an iPad 2 at 5 % and the Anker 13000 battery fully charged and at 4 LEDs. * 30 min 19% 4 LEDs * 60 min 33% 4 LEDs * 90 min 47% 3 LEDs * 120 min 61% 2 LEDs * 150 min 75% 2 LEDs * 180 min 86% 2 LEDs * 210 min 92% 2 LEDs * 240 min 100% 2 LEDs Start iPhone 4 at 10 % and the Anker 13000 battery at 2 LEDs. * 30 min 43% 2 LEDs * 60 min 75% 2 LEDs * 90 min 89% 2 LEDs * 120 min 95% 2 LEDs * 150 min 100% 2 LEDs Start a second iPhone 4 at 19 % and the Anker 13000 battery at 2 LEDs. * 30 min 50% 1 LEDs * 60 min 78% 1 LEDs * 90 min 89% 1 LEDs * 120 min 100% 1 LEDs Start a Kindle Fire at 28 % and the Anker 13000 battery at 1 LEDs. * 30 min 46% on the Kindle Fire and the battery pack is dead Anker 13000 mAh capacity used: * iPad 2 charging used 6596.8 mAh * First iPhone 4 used 1278 mAh * Second iPhone 4 used 1150 mAh * Kindle Fire used 792 mAh * Total power consumed from the Anker 1300 is 9816.8 mAh of capacity or 75.5% of 13000 which is a very good result! Here are some common devices and the amount of mAh of capacity they have when they are fully charged. This is just to give you an impression of how much energy it takes to charge your smart device: * iPhone 4 battery 1,420 mAh battery capacity * iPhone 4S battery 1,432 mAh battery capacity * iPad 2 battery 6,944 mAh battery capacity * iPad 3 battery 11,560 mAh battery capacity * Kindle Fire battery 4400 mAh capacity * Kindle Keyboard battery 1750 mAh capacity * iPhone 5 is 3.8 VDC at 5.45 Wh = 1434 mAh battery * iPad 4 battery is 11,486 mAh 3.7 VDC at 42.5 Wh * iPad Mini battery is 4490 mAh at 3.72 VDC 16.7 Wh When using an external battery you have to allow approximately 30 % of the battery capacity will be lost to heat, voltage conversion, powering the batteries electronics and the electronics of your electronics device's charging circuits. In addition you have to consider that your device is not truly off like a cell phone is still connected to the WIFI and phone networks and probably receiving emails, etc. Real world examples of charging capability with this battery pack: * iPhone 4 or 5 approximately 6.91 full charges out of a fully charged Anker 13000 mAh battery pack * iPad 2 approximately 141% of a full charge * iPad 3 or 4 approximately 85% of a full charge * iPad Mini approximately 219% of a full charge * Kindle Fire approximately 223% of a full charge * A normal estimated usable storage is 70% of capacity or .70 * 13000 mAh = 9100 mAh charging capacity available for your electronic devices. * In my testing I was able to use approximately 9816.8 mAh of capacity or roughly 75.5% of the 13000 mAh capacity. This is a very good result. I received a sample product for evaluation and I promised to provide a fair and honest review.. this is my Anker Astro E4 13000mAh External Battery Charger Power Bank for Apple: iPad mini, iPhone 5 (Lightning Cable not Provided); iPhone 4S, iPad; Android Tablets: Google Nexus 7 Nexus 10; Android Smart Phones: Samsung Galaxy S4, S3, S2, Galaxy Note II; HTC Sensation, One X V S, EVO 4G, Thunderbolt; Nokia Lumia 920 900 N9; Motorola Razr; Blackberry Z10; Sony Xperia Z [3 mobile phone connectors] - Black reviews

Anker Astro E4 13000mAh External Battery Charger Power Bank for Apple: iPad mini, iPhone 5 (Lightning Cable not Provided); iPhone 4S, iPad; Android Tablets: Google Nexus 7 Nexus 10; Android Smart Phones: Samsung Galaxy S4, S3, S2, Galaxy Note II; HTC Sensation, One X V S, EVO 4G, Thunderbolt; Nokia Lumia 920 900 N9; Motorola Razr; Blackberry Z10; Sony Xperia Z [3 mobile phone connectors] - Black Specs

• Monster capacity (13000mAh) delivers 6+ charges to most smartphones or 80% of a full cycle to iPad 3 / 4. In terms of power, this is the biggest, baddest battery in the Anker® mobile line.
• Dual USB ports (5V 2A / 5V 1A) allow for simultaneous charging of your iPad, iPhone, Android, and more at high speed.
• Premium lithium-ion battery ensures quality, supplying 500+ recharge cycles over a lifetime.
• Smooth, ivory varnish allows you to power up in style, while 4 status LEDs keep you informed of remaining capacity. Built-in flashlight for dark or low-light environments.
• Package includes: 1 Anker® Astro E4 External Battery, 3 connective adapters for smartphones, 1 USB cable, instruction manual.

. Anker Astro E4 13000mAh External Battery Charger Power Bank for Apple: iPad mini, iPhone 5 (Lightning Cable not Provided); iPhone 4S, iPad; Android Tablets: Google Nexus 7 Nexus 10; Android Smart Phones: Samsung Galaxy S4, S3, S2, Galaxy Note II; HTC Sensation, One X V S, EVO 4G, Thunderbolt; Nokia Lumia 920 900 N9; Motorola Razr; Blackberry Z10; Sony Xperia Z [3 mobile phone connectors] - Black

Anker Astro E4 13000mAh External Battery Charger Power Bank for Apple: iPad mini, iPhone 5 (Lightning Cable not Provided); iPhone 4S, iPad; Android Tablets: Google Nexus 7 Nexus 10; Android Smart Phones: Samsung Galaxy S4, S3, S2, Galaxy Note II; HTC Sensation, One X V S, EVO 4G, Thunderbolt; Nokia Lumia 920 900 N9; Motorola Razr; Blackberry Z10; Sony Xperia Z [3 mobile phone connectors] - Black Best buy

Anker Astro E4 13000mAh External Battery Charger Power Bank for Apple: iPad mini, iPhone 5 (Lightning Cable not Provided); iPhone 4S, iPad; Android Tablets: Google Nexus 7 Nexus 10; Android Smart Phones: Samsung Galaxy S4, S3, S2, Galaxy Note II; HTC Sensation, One X V S, EVO 4G, Thunderbolt; Nokia Lumia 920 900 N9; Motorola Razr; Blackberry Z10; Sony Xperia Z [3 mobile phone connectors] - Black
. Anker Astro E4 13000mAh External Battery Charger Power Bank for Apple: iPad mini, iPhone 5 (Lightning Cable not Provided); iPhone 4S, iPad; Android Tablets: Google Nexus 7 Nexus 10; Android Smart Phones: Samsung Galaxy S4, S3, S2, Galaxy Note II; HTC Sensation, One X V S, EVO 4G, Thunderbolt; Nokia Lumia 920 900 N9; Motorola Razr; Blackberry Z10; Sony Xperia Z [3 mobile phone connectors] - Black will.. (Read More)

Anker Astro E4 13000mAh External Battery Charger Power Bank for Apple: iPad mini, iPhone 5 (Lightning Cable not Provided); iPhone 4S, iPad; Android Tablets: Google Nexus 7 Nexus 10; Android Smart Phones: Samsung Galaxy S4, S3, S2, Galaxy Note II; HTC Sensation, One X V S, EVO 4G, Thunderbolt; Nokia Lumia 920 900 N9; Motorola Razr; Blackberry Z10; Sony Xperia Z [3 mobile phone connectors] - Black,

8 out of 10 based on 68 ratings