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Anker Astro Pro2 20000mAh Multi-Voltage External Battery

Anker Astro Pro2 20000mAh Multi-Voltage External Battery

78APIPADMNI2-02USA

Product Description

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 a wide range of laptops – in addition to virtually all USB-charged devices.

Laptop compatibility criteria:

(1) voltage: 12V, 16V or 19V, (2) current: 3.5A or less, and (3) a laptop connector size that fits your power input (see below).

Laptop connector tip sizes (in mm):

6.00 x 4.25 - Sony VAIO
6.25 x 3.00 - Toshiba Satellite A105, M35
5.50 x 2.10 - Toshiba T1900, T1950, T4700 / AcerNote 330T , Acer Aspire 1200
4.75 x 1.70 - ASUS Eee 900, 1000
5.50 x 1.70 - Acer Aspire One AO722 AO725 AOD270
5.50 x 2.50 - ACER Aspire 1600, 5610
4.00 x 1.70 - HP Mini 1000/ 1100 PC Series
5.00 x 3.25 - Samsung NC10, N130, N310
7.40 x 5.00 - HP Pavilion DV6 / HP G60, G61/ HP Compaq CQ60, CQ61 / HP 550 / Dell inspiron 1525, 6000, E1505
7.90 x 5.40 - Lenovo ThinkPad T60, X60, R60

Customer Reviews

S. Moore
  • Hefty battery delivers near (but not quite) to advertised capacity
  • The battery capacity as advertised is 20,000mAh. I measured 12,760mAh using a Vencon UBA battery analyzer from the USB port operating at 1 Ampere (approximately the C/10 rate). The voltage stayed steady at 5.12V throughout the entire discharge process. Assuming the Anker battery uses a boost converter from the internal Lithium-ion battery (3.7V nominal) to USB (5.12V measured), this is x1.38 voltage boost. Assuming the boost circuit is 90% efficient, the conversion ratio is 1.54. Therefore, if I measured 12.76Ah capacity from the USB port, the internal battery is approximately 19.6Ah. This number is near to the advertised 20,000mAh. Correcting for my approximations, the real capacity is probably about 5% less than their advertised capacity - a little disappointing, but not unusual for battery manufacturers to overstate technical parameters in ad copy.I tested the battery clamped between two large aluminum heatsinks to approximate an isothermal test condition. Without the heatsinks, the battery warmed slightly during a 2-Amp discharge and subsequent recharge.The battery was tested on a Dell e6230u laptop. The laptop recognized the battery and enabled full power operation. Dell laptops require a special encoded power connection. Some third-party cables do not have the encryption chip and the laptop rejects the connection. The Anker battery successfully passed the Dell encryption interrogation and was recognized as an acceptable power source.After a few international flights, some cycles, and calendar life, I will repeat my capacity measurements and post an update.
  • 2014-10-13

WaterDemon
  • Excellent product when combined with the Vktech 28 connector plug ...Verified PurchaseThis review is from: Anker® Astro Pro2 20000mAh Multi-Voltage (5V 12V 16V 19V) External Battery Charger for iPad A
  • Excellent product when combined with the Vktech 28 connector plug pack, located here: http://www.amazon.com/gp/product/B00CMMO6AEFirst charge of the device, and it ran my 2013 Razer Blade for better than 2 hours on high performance mode while watching Netflix. (let the Anker drain down to 10%). Slim, high quality, and fairly light given what it is. Nice to have the extra power on the go, at a decent price point as well.
  • 2014-10-13

A. Houston
  • Beautiful and PowerfulVerified PurchaseThis review is from: Anker® Astro Pro2 20000mAh Multi-Voltage (5V 12V 16V 19V) External Battery Charger for iPad Air, Mini, iPhone 6, 5S, 5C, 5, 4S, Samsung Gala
  • Way cool. Beautiful battery and has saved my tail, more than once. It's about the size of a thin netbook computer, a little heavy, but lasts "forever" and has charged everything I've pllugged into it. Keep in mind, charging and powering are two different things. It will charge my Toshiba F755 computer, but it won't power it. Read about how to reset it if it freezes (usually because of something I did). Also, how to switch power from the battery's output to the USB port. Very satisfied.
  • 2014-10-07

jasim
  • hope to have more than 1 usb portVerified PurchaseThis review is from: Anker® Astro Pro2 20000mAh Multi-Voltage (5V 12V 16V 19V) External Battery Charger for iPad Air, Mini, iPhone 6, 5S, 5C, 5, 4S, S
  • Only 1 usb port. But it is high quality. I could be the best if it has 3-4 usb since the power is 20000 mah
  • 2014-10-06

LUIS G SILVA PIRES
  • Five StarsVerified PurchaseThis review is from: Anker® Astro Pro2 20000mAh Multi-Voltage (5V 12V 16V 19V) External Battery Charger for iPad Air, Mini, iPhone 6, 5S, 5C, 5, 4S, Samsung Galaxy S5, S4, S
  • Excelent!
  • 2014-10-06
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Customer FAQ

Q1.  Can I use USB cables other than those provided with my Anker external battery?
To ensure complete safety and best performance, we strongly recommend using your device’s original cable, a third-party certified cable (such as MFI) or our included cable.
Q2.  Does it work with the new iPhone 5s, 5c?
Yes. But the Apple connector is not included. Please use your device's original cable.
Q3.  Anker external batteries' efficiency.
ALL external batteries lose power due to voltage conversion and circuit resistance.

Approximately 20% of Astro 2nd Generation external battery’s total capacity is consumed, including power lost from circuit heat and voltage conversion within the external battery (approximately 6%) and the charging cable and your device (approximately 14%). This efficiency rate is 15% higher than the industry average of 35%.

Older Astro batteries have lose approximately 30%.

According to industrial standards, all external batteries are labeled based on their raw cells capacity not efficiency. Like others, we are following this standard.
Q4.  How long will the battery lasts while not in use?
Generally, most of our external batteries' static power consumption is lower than 100uA, which will take between 3.5 and 20 years to drain the battery completely.

However, the chemicals within the li-ion battery will gradually become less active over prolonged periods without use. Most will die in 2 years of inactivity.

To extend your battery's life:
1. Charge and recharge it at least once every 3-4 months.
2. Do not over-charge or over-discharge it. It is best to keep it charged between 5%-95%.
Q5.  Can Anker external batteries be used for international travel?
Yes. Be sure the USB adapter you bring with is compatible with the voltage of the country you will be traveling to. An adapter's voltage input is usually printed on the adapter.
Q6.  Can external batteries be taken on board airplanes?
Yes, all Anker external batteries can legally and safely be taken on board airplanes. Here are the relevant requirements:

Quoted from Federal transportation security rules (Effective January 1, 2008):
Lithium ion batteries (a.k.a.: rechargeable lithium, lithium polymer, LIPO, secondary lithium).
-Passengers may carry consumer-sized lithium ion batteries [no more than 8 grams of equivalent lithium content or 100 watt hours (wh) per battery]. This size covers AA, AAA, 9-volt, cell phone, PDA, camera, camcorder, Gameboy, and standard laptop computer batteries.
-Passengers can also bring two (2) larger lithium ion batteries (more than 8 grams, up to 25 grams of equivalent lithium content per battery) in their carry-on. This size covers larger extended-life laptop batteries. Most consumer lithium ion batteries are below this size.

Anker's largest external battery is currently the Anker Pro 20000mAh (74 wh) which is lower than the above 100 wh limit.
Q7.  What can I do if I lose the provided accessories?
Please check to see if you have extras or contact us via email at support@ianker.com for help.
Q8.  Anker external batteries' compatibility
Anker external batteries are compatible with Android and Apple smartphones and tablets except Asus devices (Apple connectors are not included, please use your devices original cable).
Q9.  Can it be charged and charge other devices at the same time?
Yes, this battery can simultaneously charge and discharge. However, constant pass-through charging may affect the battery’s lifespan
Q10.  Do I need to press the power button when charging other devices?
Yes.
Q11.  Can it charge multiple devices simultaneously?
It can charge two devices simultaneously.
Q12.  Can it charge the Samsung Tab?
No.
Q13.  Is it compatible with Asus tablets?
No.
Q14.  How can I tell if this external battery is compatible with my laptop?
Please make sure your laptop's input is the same or lower than the Anker Astro Pro2's and there is a tip in the list bellow that will fit your laptop.

Laptop compatibility criteria:
(1) voltage: 12V, 16V or 19V, (2) current: 3.5A or less, and (3) a laptop connector size that fits your power input (see below).

Laptop connector tip sizes (in mm):
A - 6.00*4.25 - Sony VAIO
B - 6.25*3.00 - Toshiba Satellite A105, M35
C - 5.50*2.10 - Toshiba T1900, T1950, T4700 / AcerNote 330T , Acer Aspire 1200
D - 4.75*1.70 - ASUS Eee 900, 1000
E - 5.50*1.70 - Acer Aspire One AO722 AO725 AOD270
F - 5.50*2.50 - ACER Aspire 1600, 5610
G - 4.00*1.70 - HP Mini 1000/ 1100 PC Series
H - 5.00*3.25 - Samsung NC10, N130, N310
J - 7.40*5.00 - HP Pavilion DV6 / HP G60, G61/ HP Compaq CQ60, CQ61 / HP 550 / Dell inspiron 1525, 6000, E1505
K - 7.90*5.40 - Lenovo ThinkPad T60, X60, R60
Q15.  How long does it take to fully charge this Anker external battery?
4-5 hours with the included adapter.
Q16.  What do the LEDs indicate when the external battery is charging itself or other devices?
The LED indicator will remain unlit when charging other devices. When it is recharging itself, the lights will light up one by one to indicate the charging progress. The LED indicators will all turn off when the Astro Pro2 is fully charged.
Q17.  How can I identify the voltage for my laptop?
Please refer to your laptop's instruction manual, the label on your laptop's battery or its orininal AC adapter.
Q18.  How can I determine the appropriate connector for my laptop?
We offer 10 laptop connectors for you to choose from. Please choose the appropriate connector according to the size and shape of your adapter’s plug. Please refer to the above list in Question 6 for the specifications of certain laptop connectors.

Note: The tips provided are the only ones Anker produces. If you can not determine the tip size of your device from the above table, please contact the devices manufacturer. If a tip for your computer is not provided, this unit may not be suitable for your needs. If you still require assistance, please contact us.
Q19.  What if the Astro Pro2 fails to recharge?
a. Check that the AC adapter is connected securely.
b. Please email us at support@ianker.com duiring your 18-month warranty period if the provided acessories or the external battery have problems.
Q20.  What if the Astro Pro2 fails to charge my devices?
a. Check that the connection between the Astro Pro2 and the electronic device is secure.
b. Check that the Astro Pro2 still holds a charge, and recharge it when the remaining power is low.
c. Check that the Astro Pro2's voltage is compatible with the electronic device's.
d. Make sure that the charging cable is working.
e. Please email us at support@ianker.com duiring your 18-month warranty period if the provided acessories or the external battery have problems.
Q21.  What voltage setting should I select to charge my phone or other USB-charged device?
You do not need to select a voltage. The voltage switch only controls the round, DC output port and not the USB ports (USB ports are always 5V).

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Latest Post

Windows surface RT 2
hi, I bought this last year but I have chnged my device since. I was wondering if there was an attachment you have (that I could get seperately) that i could charge my Windows surface 2 (RT) with? thanks, Zacch
Replies(0) Collapse Report as spam Oct 18, 2014 at 10:11 PM
How to defeat the auto shut off?
I use the Anker Pro2 LION battery to power a small radio transciever. The radio draws such little current while idling, that it fools the battery auto shut off, and my radio powers off when the battery shuts off. Otherwise, the battery performs flawlessly. Is there a way to defeat the auto shut off? Thanks!
Replies(1) Collapse Report as spam Oct 18, 2014 at 8:46 AM
Justin Rohr
The reason auto-shut off is there is to keep from overcharging and holding a battery at 100% which is bad. The only way would be to cause the battery to draw more current, such as charging a phone, but then you loose how long you can power the radio.Is there a way to keep your radio from idling?
Reply Report as spam Oct 18, 2014 at 7:24 PM
Charging amperage
Trying to use this with a solar panel with an output of "DC:18V*770mA /USB:5V*2.1A."Is that amperage too low or will it work (just slower than normal)?
Replies(2) Collapse Report as spam Oct 8, 2014 at 2:24 PM
Elliott
I asked this several times under a posting with the heading "Anker chargin" but have been ignored for weeks.
Reply Report as spam Oct 8, 2014 at 2:25 PM
ANKER Team


The Astro Pro2 needs an input of 15-19V/1.3A DC.

If the device you're using can supply that then the Pro2 will charge just fine.
Reply Report as spam Oct 8, 2014 at 9:30 PM
Simon C
Hi,Will this power bank power a telescope with an AZ Goto mount and for approximately how long?The power requirements are, tip positive with 11v to 15v (say nominally 12v), 1amp supply. I look forward to your reply.Kind regardsSimon C
Replies(1) Collapse Report as spam Oct 4, 2014 at 3:19 AM
ANKER Team


Yes, this should work fine.

It is worth remembering that if the power draw from the battery goes below 0.05A for more than around 50 seconds then the Astro will switch itself off.
Reply Report as spam Oct 5, 2014 at 9:00 PM
Work with Sony Vaio svt131a11m ?
As per the title, the only two issues i see is that 1. there isn't the correct laptop connector pin size. I believe the size i need is 6.5x4.4, do you supply this? And 2. i believe the voltage for the battery it 19.5. So with the correct connector will it charge?  Thanks Sam
Replies(2) Collapse Report as spam Sep 29, 2014 at 8:36 AM
ANKER Team


The max output of the Pro2 is 19V so it probably won't work with your laptop unfortunately.
Reply Report as spam Sep 29, 2014 at 10:00 PM
Sam May
Quote From ANKER Team: Thanks for the reply, if i were to still purchase this do you have the correct connector pin size or my laptop?
Reply Report as spam Sep 30, 2014 at 5:58 AM
Anker chargin
Can I charge pack this via USB? If not, what are the specs for charging? I am looking at using this with portable solar panels.
Replies(7) Collapse Report as spam Sep 24, 2014 at 7:14 PM
Elliott
Quote From ANKER Team: Still no answer to this...
Reply Report as spam Oct 2, 2014 at 5:45 PM
Elliott
It's been weeks - is anyone seeing this??
Reply Report as spam Oct 7, 2014 at 7:22 PM
Elliott
I'd like to use this with your Anker 14W panels, but they only have USB outputs.
Reply Report as spam Sep 24, 2014 at 7:17 PM
Elliott
This is the link for your panel on Amazon: http://www.amazon.com/gp/product/B00E3OL5U8/ref=gno_cart_title_3?ie=UTF8&psc=1&smid=ATVPDKIKX0DERIf that doesn't work, will this battery pack be compatible with this panel? http://www.amazon.com/gp/product/B00G6C5NR6/ref=ox_sc_act_title_2?ie=UTF8&psc=1&smid=A18M12GR6V2Z8F
Reply Report as spam Sep 24, 2014 at 7:31 PM
ANKER Team


You can't charge it from our solar chargers as they don't have the required output.

You'll be able to charge it with anything that can deliver DC current at 15-19V/1.3A.
Reply Report as spam Sep 24, 2014 at 9:00 PM
Elliott
The second panel (sadly not your brand) has this output:Output: DC:18V*770mA /USB:5V*2.1A.Is that amperage too low or will it work (just slower than normal)?
Reply Report as spam Sep 25, 2014 at 2:15 PM
Elliott
Quote From ANKER Team: Any change your could answer that amperage question?
Reply Report as spam Sep 26, 2014 at 5:39 PM
Anker Pro does not charge itself
I'm having an issue with my Anker 20000mah external battery. It does NOT charge ITSELF. Whenever I plug the device onto the wall, the LCD keeps blinking and displays a small icon that looks like a CD with a small arrow. I tried leaving it and coming back a day later but it did not work. It's still 00%. 
Replies(1) Collapse Report as spam Sep 23, 2014 at 12:00 AM
ANKER Team


It sounds like it might be playing up.

Please have another go with a different AC charger if you have one available and see if that helps. Either way, get in touch with our customer service guys at support@ianker.com and let them know, they'll replace anything that is defective.
Reply Report as spam Sep 23, 2014 at 9:00 PM
Mr. Darrin
I just purchased the Anker Astor Pro2 2nd Gen 20000 mAh.  Is there a tip for the laptop HP pavilion dv7t-5000?
Replies(1) Collapse Report as spam Sep 18, 2014 at 2:44 PM
ANKER Team


The 2nd Gen Pro doesn't come with any adapters but the 1st Gen does. You can find them all on their Amazon listings.

Both of them have a DC output size of 5.5*2.5mm though so if it doesn't have the right adapter you should be able to find one online.
Reply Report as spam Sep 18, 2014 at 10:30 PM
Astro Pro2 for HP EliteBook 8470p
Hello, I bougth a Astro Pro2, and the connector doens't fit to the power adaptor input.It is very close to 7.40x5.00 J connector, but the inner pin of connector is bigger in diameter than the Laptop input.Do you have any solution ?Regards.Masaaki (from Brazil)
Replies(1) Collapse Report as spam Sep 1, 2014 at 12:37 PM
ANKER Team


The output plug size is 5.5x2.5mm so you'll need an adapter to accept that plug and then go into the laptop.
Reply Report as spam Sep 2, 2014 at 2:30 AM
Dan
I just bought a 2015 15 inch Mac Book Pro.  The charger is a Mag safe 85 watts power adapter.  Will the Astro Pro2 20000mAh Multi-Voltage External Battery rsecharge m laptop?
Replies(1) Collapse Report as spam Aug 30, 2014 at 12:28 PM
ANKER Team


The max output of the 2nd Gen Pro2 is 57W so this probably won't be enough to charge the 1st Gen Pro2.
Reply Report as spam Sep 1, 2014 at 2:30 AM
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