Cheapest Anker® Astro Pro2 20000mAh Ultra-High Capacity Multi-Voltage
(5V 12V 16V 19V) External Battery Backup Charger Power Pack for
Tablets, Netbooks, Notebooks, Laptops and Smart Phones -- Compatible
with HP, Dell, Acer, Asus, Toshiba Notebooks, Google Glass, Nexus
Tablets, iPads, iPhone 5S, 5C, 5, 4S (Apple adapters not included),
Samsung Galaxy S4, S3, Note 2 and More
Anker® Astro Pro2 20000mAh Ultra-High Capacity Multi-Voltage (5V 12V 16V 19V) External Battery Backup Charger Power Pack for Tablets, Netbooks, Notebooks, Laptops and Smart Phones -- Compatible with HP, Dell, Acer, Asus, Toshiba Notebooks, Google Glass, Nexus Tablets, iPads, iPhone 5S, 5C, 5, 4S (Apple adapters not included), Samsung Galaxy S4, S3, Note 2 and More Review
Need to charge more than just your mobile phone? Invest in greater, more versatile power with the Anker Astro Pro2.
A beast of a battery.
When a standard external battery just won't cut it, reach for the Astro Pro2. Packed with 20000mAh of capacity, this is one portable power pack that's able to charge most phones 9 times, tablets more than once or a laptop one time.
Hugely versatile.
Choose from between DC 12V / 4A, 16V / 3.5A, 19V / 3A and USB 5V / 2.1A outputs for greater accessibility. The three voltage selections enable this external battery to charge laptops (that meet compatibility requirements) - in addition to virtually all USB-charged devices.
Laptop compatibility requirements (both must be met), Please check to ensure compatibility before purchasing:
1) Voltage input: 11.5-12.5V, 15.5-16.5V or 18.5-19V.
2) A laptop connector that fits your device's power input port (see below).
Included laptop connector tip sizes (outer x inner diameter in mm):
A - 6.00×4.25 - Sony VAIO
B - 6.25×3.00 - Toshiba Satellite A105, M35
C - 5.50×2.10 - Toshiba T1950, T4700 / Acer Aspire 1200
D - 4.75×1.70 - ASUS Eee 900, 1000
E - 5.50×1.70 - Acer Aspire One AO722 AO725
F - 5.50×2.50 - ACER Aspire 1600, 5610
G - 4.00×1.70 - HP Mini 1000/ 1100 Series
H - 5.00×3.25 - Samsung N130, N310
J - 7.40×5.00 - HP Pavilion DV6 / HP G60, G61/ HP Compaq CQ60, CQ61 / HP 550 / Dell inspiron 1525, E1505
K - 7.90×5.40 - ThinkPad T60, X60, R60
Get to know us.
The Anker® Astro external battery has been voted #1 in class by thousands of online reviewers, while our renowned customer service has made us a fan-favorite across the web. Every sale includes an 18-month, worry-free guarantee to prove the importance we set on quality. After all, we're customers too.
Price :
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Anker® Astro Pro2 20000mAh Ultra-High Capacity Multi-Voltage (5V 12V 16V 19V) External Battery Backup Charger Power Pack for Tablets, Netbooks, Notebooks, Laptops and Smart Phones -- Compatible with HP, Dell, Acer, Asus, Toshiba Notebooks, Google Glass, Nexus Tablets, iPads, iPhone 5S, 5C, 5, 4S (Apple adapters not included), Samsung Galaxy S4, S3, Note 2 and More Feature
- 20000mAh of capacity, provides 1 full charge to most laptops or approximately 9 cycles to most smartphones.
- Reliable lithium polymer battery ensures quality. More than 500 recharges over its lifetime.
- Equipped with two outputs for greater versatility: 1 DC 12V / 4A, 16V / 3.5A or 19V / 3A port and 1 USB 5V / 2.1A port.
- Slim and stylish aluminum body ensures efficient heat dissipation, lighter weight, and durability. 4 smart LEDs keep you updated as to the remaining capacity.
- Package contents: 1 Anker® Astro Pro2 20000mAh External Battery, 4 phone connectors, 10 laptop connectors, 1 USB cable, 1 DC power cable, 1 AC 100-240V power adapter, 1 accessories pouch, 1 user manual.
Anker® Astro Pro2 20000mAh Ultra-High Capacity Multi-Voltage (5V 12V 16V 19V) External Battery Backup Charger Power Pack for Tablets, Netbooks, Notebooks, Laptops and Smart Phones -- Compatible with HP, Dell, Acer, Asus, Toshiba Notebooks, Google Glass, Nexus Tablets, iPads, iPhone 5S, 5C, 5, 4S (Apple adapters not included), Samsung Galaxy S4, S3, Note 2 and More Maybe you should visit the following website to get a better price and specification details
Costumer review
172 of 184 people found the following review helpful.
Beautifully designed product that works well! This is the most powerful battery pack I have ever tested!
By jjceo (jjceo@comcast . net)
Watch Video Here: http://www.amazon.com/review/RTINO3AEQQF0E This battery pack is simply the most powerful rechargeable battery pack that I have ever tested. It is also the highest quality design and construction that I have seen in any battery pack. I was so impressed that I put together a video of the unit and the test results for your review.
The construction of this battery pack is simply beautiful. The exterior shell is brushed aluminum that looks fantastic. The battery is the size of a 7 inch tablet and it weighs in at 1 pound 4 ¼ ounces. It is assembled with machine screws and the overall construction is the best I have seen. The battery pack has a USB output port that outputs 5 VDC at 2.1 Amps. It can also output 12 VDC at 4 amps, 16 VDC at 3.5 Amps and 19 VDC at 3 amps to charge many laptop and netbook computers. There is a voltage switch to set the output voltage for specialty charging so make sure that you set it to match your needs of your device. This is important.
This is the first battery pack that I have seen that has enough power to charge an iPad 3 fully and in reality it could charge it 1.3 times according to my tests. I was able to charge my electronic devices for over 10 hours on a single charge of the battery pack which is amazing. Nothing I have ever tested has even come close to the performance of this battery pack. During the testing the temperature of the battery pack never even exceeded ambient room temperature. I used the USB port to charge my devices during this testing. To start your device charging connect it with the proper cable and power adapter, set the voltage if required and press the battery pack power button and charging starts. The charging will stop automatically when your device is fully charged or the battery pack is depleted.
There are 5 LEDs to indicate the amount of battery charge in the battery pack. Power levels are indicated by:
* One flashing LED is 1% charge
* 1 solid lit LED is 1% to 20%
* Two lit LEDs is 20% to 40%
* Three lit LEDs is 40% to 60%
* Four lit LEDs is 60% to 80%
* Five lit LEDs is 80 to 100 %
In addition there are three LEDs to indicate the voltage setting of the specialty voltage output. The Lithium Polymer battery can be recharged over 500 times during its life cycle and if you are a power user of a tablet, laptop or any electronic device then this is the battery pack to own. It comes with an 18 month warranty. The unit comes with a powerful AC wall charger that quickly recharges the battery pack. The specs claim that it can recharge the battery pack in about 3 hours.
This product is the best I have tested and I rate it at 5 stars. If you are a business person or a student and have to depend on your tablet or laptop for long periods of time without the ability to get to an AC power source then this is the battery to own.
Items in the box:
* Powerful AC wall charger adapter that will operate on 100 to 240 VAC at 50 to 60 Hertz.
* The battery itself
* A charging cable for your laptop and 10 different styles of laptops
* A phone charging cable
* 5 mobile phone charging adapters
* A user instruction manual
* The 18 month warranty card
Charging my devices:
I charged the battery pack fully before I started my test. I started with an iPad 3 charge at 21 percent and the Anker 20000 was at 5 LEDs.
* 30 minutes 29 percent and Anker at 4 LEDs
* 60 minutes 38 percent and Anker at 4 LEDs
* 90 minutes 47 percent and Anker at 4 LEDs
* 120 minutes 56 percent and Anker at 4 LEDs
* 150 minutes 64 percent and Anker at 3 LEDs
* 180 minutes 73 percent and Anker at 3 LEDs
* 210 minutes 81 percent and Anker at 2 LEDs
* 240 minutes 89 percent and Anker at 2 LEDs
* 270 minutes 95 percent and Anker at 2 LEDs
* 300 minutes 100 percent and Anker at 2 LEDs
I used the same battery pack without recharging it and I began charging a Kindle Fire which was at 53 percent capacity. The Anker was at 2 LEDs.
* 30 minutes 78 percent and Anker at 2 LEDs
* 60 minutes 92 percent and Anker at 2 LEDs
* 90 minutes 100 percent and Anker at 2 LEDs
I used the same battery pack without recharging it and I began charging an iPhone 4 which was at 51 percent capacity. The Anker was at 2 LEDs.
* 30 minutes 80 percent and Anker at 2 LEDs
* 60 minutes 92 percent and Anker at 2 LEDs
* 90 minutes 96 percent and Anker at 2 LEDs
* 101 minutes 100 percent and Anker at 2 LEDs
I used the same battery pack without recharging it and I began charging an iPad 2 which was at 16 percent capacity. The Anker was at 2 LEDs.
* 30 minutes 31 percent and Anker at 1 LED
* 60 minutes 45 percent and Anker at 1 LED
* 90 minutes 58 percent and Anker at 1 LED
* 120 minutes 64 percent and Anker at 1 LED that was flashing indicating that it needed to be charged.
Limitations of device charging of some common electronic devices:
* 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
As you can see the Anker 20000 mAh will fully charge a totally dead iPad 3 or 4 because it contains 20000 mAh of capacity.
All of this from the first charge:
* 79% of an iPad 3 charge equals 9132.4 mAh.
* 47% of a Kindle Fire charge equals 2068 mAh.
* 49% of an iPhone 4 charge equals 695.8 mAh.
* 48% of an iPad 2 charge equals 3333.2 mAh.
* That equals 15229.32 mAh output over a 10 hour period and that is an output efficiency of over 76% on my first charge of the Anker 20000 mAh battery pack.
You have to consider the losses in the charging circuits of both the battery pack and the device you are charging so this result is outstanding! 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. This is the most powerful rechargeable battery pack I have tested.
I received a sample product for evaluation and I promised to provide a fair and honest review.
76 of 83 people found the following review helpful.
Great Product, but you need to know this:
By JC Reaves
There are several reviews that complain of two faults with this external battery, and the reviewers downgrade it as a result. I have found that these issues are not really problems.
1st Reported Issue: The USB port doesn't work.
Yes, it probably does - it just doesn't work automatically. Unlike the 12v,16v and 19v pin output which begins charging your device as soon as it is plugged in, the USB output port has to be turned on by pressing the front panel button on the battery. This can be confusing and I believe several people just decided the USB charge port didn't work when it didn't begin charging their USB devices. Just push the button and it will work.
2nd Reported Issue: The battery can be shorted making it useless
I thought this too after I accidentally connected the input and output ports on the battery. It went dead immediately and nothing would get it to start. However, Anker support suggested I connect the battery to the wall charger. As soon as I did this the battery began working again. Connecting the battery to the wall charger resets it. So again, no problem.
Neither of these tips are documented in the battery's instructions so I can understand how people would think the battery was defective when it was actually fine.
I really like this external battery. It is easier to carry around than a wall charger and you can recharge almost every electronic device you own anywhere. It has a lot of capacity and once you know its two quirks it's foolproof to operate. Support from Anker has been great - they are very responsive.
I would like to see Anker redesign the input and output ports so they are not so similar. it is very easy to confuse input and output since they are both pin plugs right next to each other. I ended up putting a piece of electrical tape over the input port just for safety.
27 of 32 people found the following review helpful.
Nice battery pack!
By A. Wiersch
This is a review of the Astro Pro2 20000mAh battery pack.
I am impressed with this pack. It is good looking and well built, enclosed in a nice aluminum enclosure. It feels very solid & includes a multitude of mobile phone and notebook connectors. If you have a USB device that charges via USB, then there should be a connector for it.
Pros:
* Relatively high capacity at 20000mAh/74Wh
* Easily charge it with the included AC adapter
* Very nice brushed aluminum enclosure & great build quality
* The notebook output has a voltage selection of 19V, 16V, or 12V.
* Easy check of battery level with the push of a button... just look to see how many of 5 green LEDs are lit.
* Lots of connection options to change USB devices, mobile phones, and notebooks (see the product description for the details - no need to repeat them here)
Cons:
* Even with lots of connection options, it may not support your notebook/ultrabook - or may require an additional adapter to do so (like with my Dell XPS 12); see the comments on this review for a link to a "Dell power dongle" that may be useful if you have a Dell XPS 12 or XPS 13
* If you have a "beefy" notebook (like one with a discrete GPU), then it's likely possible to overload the battery if you run the CPU and/or GPU at high load, in which case the battery pack and notebook may shut down. Other things may affect the load too, like plugged in USB devices and how bright your screen brightness is set to. I did a test with my Dell XPS M1530 which the screen brightness all the way up and ran Intel Burn Test to get the CPU going and it DID work. I think it was pushing it though. The battery indicator went down during the high load but went back up when the test was over.
Other:
* 18 month warranty
* Manual says to charge it thoroughly every 4 months to avoid shortening its lifespan
* There's an overhead of about 30% for power loss from circuit heating and voltage conversion
* See the two product images I uploaded for size comparison and a photo of the input/output ports and voltage switch.
* While you can run notebooks directly off the power from this battery, I don't believe all notebooks will charge their batteries from the power supplied (and this may be a good thing as you'd likely just loose more of the capacity in charging overhead/loss). I'll have to check this when my new battery gets here for my Dell XPS M1530.
It works great to run my Dell XPS M1530 notebook computer (which currently has a dead battery). The notebook thinks it's on AC power of course.
If you need/want something smaller for phones, iPads, and other "USB charged" devices, this is another good option: Anker® Astro3E 10000mAh Dual 5V 3A USB Output External Battery Pack Charger for Smart Phones, Android Phones, PS Vita, GoPro; iPad mini, more
Overall this is a great unit for what it is - so I'm giving it 5 stars. Get it if you need a lot of portable power and flexibility "on the go".
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