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EasyAcc 20000mAh Power Bank

EasyAcc 20000mAh Power Bank

The EasyAcc Monster PowerBank 20000mAh can charge 100% of its capacity in 6 hours. A perfect companion to power up all of your mobile devices on the go.

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EasyAcc 20000mAh at a glance

Key specs


20000 mAh

74 Wh

Dimensions (LxWxH)

7.3 x 5 x 1.3 in

18.54 x 12.70 x 3.30 cm


16.8 oz / 476 g

Charging technology

Charging time: 6 h

High speed charging

Dual input

PBE metrics



322.56 mAh/$


42.02 mAh/g

1190.48 mAh/oz


USB Type A

USB Type A

Output: 5V/2.4A
USB Type A

USB Type A

Output: 5V/2.4A
USB Type A

USB Type A

Output: 5V/2.4A
USB Type A

USB Type A

Output: 5V/2.4A
Micro USB port

Micro USB

Input: 5V/2A
Micro USB port

Micro USB

Input: 5V/2A

Flight status

Under 100 Wh

Status: Safe

The power bank is safe to take on board. It's under the specified TSA limit of 100 Wh. Read more about taking power banks on planes.

Other features

LED power indicator


Overheating protection

Short circuit protection

Surge protection

Charging cable

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Charging capacity calculator

Use the search bar below and find out exactly how many times can the EasyAcc 20000mAh charge your smartphone battery

EasyAcc Monster PowerBank 20000mAh Review

The EasyAcc Monster PowerBank 20000mAh is an extremely impressive bit of kit. One feature that really sets it apart is its dual 4A input ports, which means you can charge the unit to 100% in 6 hours – a notable achievement for a 20000mAh unit! With slick looks and solid construction, this is a portable charger well worth taking note of.

  • EasyAcc 20000mAh 7
  • EasyAcc 20000mAh 12
  • EasyAcc 20000mAh 11
  • EasyAcc 20000mAh 9
  • EasyAcc 20000mAh 8
  • EasyAcc 20000mAh 10
  • EasyAcc 20000mAh 5
  • EasyAcc 20000mAh 3
  • EasyAcc 20000mAh 3
  • EasyAcc 20000mAh 2

Capacity & Charging speed

A powerful unit, the EasyAcc Monster PowerBank 20000mAh offers a very good bang for your buck. On its leading-edge, you will find dual 4A input ports, accompanied by 2 Micro USB to USB cables. A really noteworthy feature, this allows you to double the power going into the unit during charging. This results in charging time of just 6 hours!

We should point out however that EasyAcc has neglected to include a dual USB wall charger. With only a single input you’ll be looking at a charge time of 10-11 hours.

If you purchase this unit we recommend getting an appropriate wall charger to maximize its efficiency. The iClever BoostCube 4.8A 24W Dual USB Travel Wall Charger would be a fine solution.

Another big tick for the EasyAcc is its 4 USB output ports which allow you to charge up to 4 devices simultaneously at a max speed of 2.4A. The 4 output ports would make this an ideal power bank for a family heading on holiday. Using smart technology, the unit automatically detects what kind of device you have plugged into it, and then delivers a suitable electric current. This is a great safety feature, and also means you’re delivering the fastest and safest current to your treasured electronic goodies.

One thing we need to address however is EasyAcc’s power claims. Tests show the actual power output at closer to 14000mAh. Whilst many manufacturers do seem to inflate their ratings, this does seem quite a discrepancy. Having said that, this unit still packs a lot of power.

Look and feel

The EasyAcc Monster PowerBank 20000mAh has a matte black body, accented by a colored stripe around the narrow edges of the unit (choose from an accent of orange, red or grey). Gently beveled on the leading edges it has a nice, smooth touch and is easy to grip. 4 LED lights on the backside of the EasyAcc indicate how full its batteries are.

The unit is dominated at one end by its 4 USB outputs and a super-bright LED flashlight. Flashlights seem to be a bit of a trend in power banks of late – whilst not an entirely necessary feature, we can testify that this one is certainly plenty bright. We should note that the flashlight lens does protrude slightly from the body, which could be an issue if you dropped the power bank and got a direct hit.

The recessed power button has a nice tactile feel to it, and double-tapping it will activate the flashlight. The packaging for the unit is pretty plain, but then again it’s the power bank that really matters right? All in all its a very nice looking power bank, and it looks like it means business. Particularly in the red or orange color variations.

Durability & Construction

The EasyAcc Monster PowerBank 20000mAh feels very well put together. The fit and finish seem excellent, we could not find any loose connections or other signs of poor manufacturing. It has a nice solid feel when you handle the unit, and feels like it’s built to last.

We have read of a few isolated cases of customers having problems with the unit 2-4 months after purchase. However, the overwhelming majority of customers have rated the EasyAcc very highly. And given that the manufacturer offers an 18-month warranty, they appear to have a lot of confidence in their product.


The EasyAcc Monster PowerBank 20000mAh measures 7.2 x 4.6 x 1.3 inches so it is not exactly pocket-sized. But then again for this power rating, you would not expect it to be so. Weighing in at 1 pound, it is not unsubstantial – but still totally useable when carried in a backpack, laptop bag, or purse.

We read about one avid Pokemon Go gamer who keeps the EasyAcc permanently in his backpack whilst he’s out and about. With a USB cable of decent length, he can roam the streets with his cell phone permanently plugged in and receiving the charge from the power bank.



Charge up to 4 devices simultaneously

Super fast recharge time thanks to dual 4A input ports

Detects the device you have plugged in and delivers appropriate output for fastest and safest charge times



Power rating does not quite match manufacturer's claims

Does not come with dual USB wall charger

Without dual USB wall charger the unit charges significantly slower

Final Thoughts

Should you need to recharge so many devices at the same time, investing in the EasyAcc Monster PowerBank 20000mAh is a great idea. We highly recommend it as you’ll not only be getting an amazing high-capacity power bank with super-efficient input and output but you’ll be also be backed by an outstanding customer service.

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