Power Bank: Anker Power Core II 20000mAh Full Review, Specification & Price

The Anker PowerCore II 20000 power bank is one of the Top portable power bank chargers there is today. It has got 20000 mAh capacity which makes it a solid choice if you are in search for a high capacity power bank that is compatible with your laptop or for a portable charger with enough backup power to charge your smartphone multiple times during the day.

Anker PowerCore II 20000 can charge up to three devices at the same time and it supports fast charging.

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  • Fast Charging Support
  • Automatically starts charging a device
  • Stops charging when battery is full
  • Stops when battery needs charging
  • Supports mobile devices with USB Type C including laptops
  • Two micro USB Input ports rated 5V/2A each
  • Fully Charges in less than 6 hours
  • Three USB output ports rated 5V/3A each
  • 6 Amperes Total Output (Max)
  • PowerIQ Technology
  • 20000 mAh Capacity
  • Solid build quality with double-layer inner metal & outer polycarbonate shell
  • Matte understated finish with curvy sides
  • Reasonable Price

It is good to know that Both Google and Apple are both moving towards 18-watt USB-C PD fast charging in latest and upcoming Android phones and iPhones as well as Mac books.

If you have a Macbook, and latest iPhone 11, 11 Pro, XS Max, XS, XR, 8, 8 +, or iPhone X, or an Android USB-C phone such as Samsung S10, S9, S8, Note 8, S7.

Then i suggest you go for the Anker power core II 20000 mAh power bank which supports 18-watt USB C PD fast charging (50% in 30 minutes) for the latest iPhones and Android smartphones.


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The Anker power core II 20000 mAh comes in two matte colors – black and a very cool looking white with four blue LED indicators. The matte finish ensures that the outer surface remains fingerprint free and looks subtly beautiful as well.

The power bank has a dual layer design. The inner metal shell provides protection and ruggedness while the outer polycarbonate layer ensures a smooth outer surface that does not scratch other items in your bag.


Anker claims that the voltage boost feature senses the resistance of the cable and increase current accordingly. However, this feature is important when you are charging your device using long cables as such cables have high resistance that wastes current and leads to slower charging eventually.

The reason why i always recommend users to use shorter and high quality cables, is as a result that they make your power bank charge last longer and charge your device faster, Anker power voltage Boost will take care of one of these issues by increasing current to charge your device faster.


Anker PowerCore II 20000 is one of the few portable chargers to feature two input ports. The high capacity power bank offers two micro USB input ports rated at 5V/2A each for recharging its batteries.

With supports for up to 4 Amperes input current, the Anker PowerCore II 20000 can fully charge in under 6 hours.

Dual input charge is a feature that is exclusive in power banks with more than 20,000 mAh capacity, but the PowerCore II 20000 is taking advantage of it. You can either use two individual chargers or a multi-port charger to charge-up the power bank.

Meanwhile, the Anker PowerCore II 20000 offers three USB output ports. Each of the ports can support up to 3 Amps. However, the total power output of the portable charger is capped at 6 Amps.

This means the ports can deliver the 3 Amperes maximum current only when one or two of the ports are in use. When all the three USB output ports of the power bank are in use, each one can deliver a still impressive 2 Amperes.

The power bank can charge your smartphone multiple times before requiring a recharge during the course of the day.


The high quality battery of the Anker power core II 20000 mAh are reassuring and promise long life and safety. it powers the various phones listed below longer than most other power banks there is.

iPhone 8, iPhone 7 and iPhone 6s, 6 – Six times

iPhone 11, iPhone 11 Pro, and iPhone XR, Xs, X,  iPhone 7 Plus, iPhone 8 Plus, iPhone 6s/6 Plus  – More than four times

Samsung Galaxy S10, S9, S9+, S8, S7, S6 – More than four times 

Samsung Galaxy S10+, Note 9, Note 10+, Note 10 – from 20% to 100% Four times

iPad Mini – Two times

iPad Pro – 1.5 times

Anker PowerCore II 20000 supports Anker’s proprietary PowerIQ fast charging technology.

With PowerIQ, the portable charger senses the optimal charging capacity of a device and supplies just about enough current to offer a fast possible charging time for the device.

Chinedu Okeke

Chinedu is the founder of Nigerian Tech. He is a tech enthusiast who has the passion for emerging trends in the tech industry. He is also a professional web content developer.

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