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Home/Products/Portable Chargers/Astro Pro2 20000mAh Portable Charger
  • Anker
    Astro Pro2 20000mAh Portable Charger
    Multi-Voltage Portable Power for Laptops and More
    Product Specs:
    Capacity :20000mAh
    Output :USB output: 5V, 2A; DC output: 12V / 4A, 16V / 3.5A or 19V / 3A
    Input :15-19V / 1.3A
    Weight :562 ± 10g / 19.8 ± 0.4oz
    Size :185 × 125 × 15.5mm / 7.2 x 4.9 x 0.6in
  • Astro Pro 20000mAh Multi-Voltage External Battery

    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


  • FAQ
    Can I use a different USB cable rather than the cable that comes with the Astro Pro2 20000mAh external battery?
    Yes, you can use other cables. However, to ensure compatibility and best performance, we strongly recommend using your device’s original cable, a third-party certified cable (such as MFI) or the included cable.
    How long will the Astro Pro2 20000mAh external battery take to be fully charged?
    It takes around 6-7 hours to fully charge the battery with the included AC adapter.
    What can I do if I lose the provided accessories?
    If you don't have an original cable or spares that you can use then please contact us via email at support@anker.com for help.
    What devices are compatible with the Astro Pro2 20000mAh external battery?
    The battery is compatible with Android, Apple or other devices (including some laptops). The DC port has a max output of 19V/3A.
    Does the Astro Pro2 20000mAh external battery work with the new iPhone 6 and iPhone 6 Plus?
    Yes, but the Apple cable is not included. Please use your device's original cable.
    How can I identify your 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

    Or you can email us at support@anker.com with the part number of the original charger that came with your laptop for help.
    Will the supplied Micro USB v2.0 connector compatible with the Micro USB v3.0 devices, such as Samsung Galaxy S5/Note2/Note3?
    Yes, take a close look at the port and you will see the port is divided, insert the none Micro-USB 3.0 plug to the appropriate side and it will work fine.
    What's the output efficiency of the Astro Pro2 20000mAh external battery?
    Approximately 30-40% of the battery capacity is unable to be used because of efficiency problems that affect all electronics devices. These include power lost from circuit heat and voltage conversions from the battery, the charging cable and your device. Your battery is able to supply 60%-70% power to other devices.
    Can the Astro Pro2 20000mAh external battery charge other devices while it is being charged?
    Can the Astro Pro2 20000mAh external battery charge multiple devices simultaneously?
    Yes, it can charge two devices simultaneously, one using the DC output port and one using the USB output port.
    What do the LEDs indicate when the Astro Pro2 20000mAh external battery is charging itself or other devices?
    When the battery is charging your devices, the LED indicator will remain unlit when charging other device. When the battery is being charged, the lights will flash repeatedly one by one to indicate progress. The LED indicator will all remain lit when the Astro Pro2 is fully charged.
    How long will the charge in the Astro Pro2 20000mAh external battery last without being used?
    Generally, our external batteries' static power consumption is so low it would take between 20 and 36 months to drain completely. However, It is also worth noting that the battery's chemicals will become less active if left unused for extended periods. To extend your battery's life, please discharge and recharge it at least once every 4 months.
    Can the Astro Pro2 20000mAh external battery be used for international travel?
    Yes. However, you may need to use an universal convert to work with the power adapter since the provided power plug is special for the country it was originally shipped to.
    Can the Astro Pro2 20000mAh external battery be taken on board airplanes?
    Yes, all external batteries with a capacity lower than 27027mAh (100 Watt Hours) can legally and safely be taken on board airplanes. To calculate a battery's capacity in Watt Hours: (Battery Capacity(mAh)*3.7)/1000.

    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.
    What should I do if the Astro Pro2 20000mAh external battery can not be charged?
    a. Check that the AC adapter is connected securely.
    b. Try a different power adapter (15-19V/1.3A, size:5.5*2.1mm) with the battery for double checking.
    c. Please email us at support@anker.com duiring your 18-month warranty period if the provided acessories or the external battery have problems.
    What should I do if the Astro Pro2 20000mAhexternal battery can not charge other devices?
    Please try a different charging cable between the Astro and your device. Email us at support@anker.com during your 18-month warranty period if this doesn't fix the issue.