Review: EasyAcc MegaCharge D20 20,000mAh Power Bank Doubin 5A Input

EasyAcc MegaCharge D20 20,000mAh Power Bank Doubin 5A Input











  • Has 4 charging ports, with the use of Quick Charge and USB-C being two of them
  • The standard ports have a charging rate of 5V/3.0A
  • Recharging speed is very fast as you can use the Micro-USB and USB-C input ports at the same time


  • The entire power bank is made of plastic, instead of Aluminum which would have been more fitting for such a powerful portable charger

Portable chargers are one of the most used types of chargers on the market. Most of the time we usually use wall chargers to charge our devices. However, power banks have gotten to that point where it’s better to use them rather than just be tied down to a wall charger. Instead, using the wall charger to recharge the power bank rather than charging your smartphone with it directly. What matters, even more, is what the portable chargers are capable doing and now that lots of brands create them, power banks are capable of doing things that wall chargers are able to do.

There are even power banks that feature wireless charging.

This EasyAcc 20,000mAh MegaCharge D20 power bank is one of the best portable chargers on the market currently. As it has a culmination of the best charging put into one charger that you can take anywhere with you. Also, this is basically an upgraded version of the already amazing first MegaCharge from EasyAcc, the 16,750mAh MegaCharge Portable Charger.


Power Capacity:

The power capacity with this power bank is 20,000mAh, However, you have to account for the conversion of the power capacity as all power banks aren’t able to give an exact output power capacity to charge your devices that it initially starts out with. Another part that has to do with this charger is the amount of the output charging ports that it has. There are 4 in total. So if you’re charging with all of the ports at the same time then that can result in a lower output of power.

With all that said, we’re going to calculate the average output capacity that you’re going to be able to use with this charger first.

3.7 x 20,000 = 74,000 / 5 = 14,800

Most of the time you’re going to be able to use about 15,000mAh of the power capacity that this charger has. However, if you’re using the Quick Charge port along with the other ports at the same time that can actually drop the output power capacity because the charging rate is faster through that port. If that’s the case then you can expect about 13,000mAh from this charger.

Even so, the capacity that you are able to use is still plenty to charge many smartphones to their full power a few times over. Such as the Galaxy S8 is able to charge to its full power about 4.5 times. If you own a smartphone that has a low battery capacity such as an iPhone 7 then that can result in 6 full charges.

So charging tablets with this power bank is also possible and you can very well charge a MacBook that’s USB-C compatible with this power bank. Since this charger uses a USB-C port.

DevicesEasyAcc MegaCharge D20 20,000mAh Power Bank Doubin 5A Input (Output Capacity = 15,000mAh)Phone CapacityEasyAcc MegaCharge D20 20,000mAh Power Bank Doubin 5A Input Left Over Capacity after One Charge

# of Full Charges for the Device
iPhone SE15,000mAh1,624mAh13,376mAh Left Over Capacity after One Charge

9.2 Full Charges
iPhone 615,000mAh1,810mAh13,190mAh Left Over Capacity after One Charge

8.2 Full Charges
iPhone 6 Plus15,000mAh2,915mAh12,085mAh Left Over Capacity after One Charge

5.1 Full Charges
iPhone 6s15,000mAh1,715mAh13,285mAh Left Over Capacity after One Charge

8.7 Full Charges
iPhone 6s Plus15,000mAh2,750mAh12,250mAh Left Over Capacity after One Charge

5.4 Full Charges
Samsung Galaxy S615,000mAh2,550mAh12,450mAh Left Over Capacity after One Charge

5.8 Full Charges
Samsung Galaxy S6 Edge15,000mAh2,600mAh12,400mAh Left Over Capacity after One Charge

5.7 Full Charges
Samsung Galaxy S715,000mAh3,000mAh12,000mAh Left Over Capacity after One Charge

5 Full Charges
Samsung Galaxy S7 Edge15,000mAh3,600mAh11,400mAh Left Over Capacity after One Charge

4.1 Full Charges
Samsung Galaxy S8+15,000mAh3,500mAh11,500mAh Left Over Capacity after One Charge

4.2 Full Charges

Output Charging:

The charging with this EasyAcc MegaCharge D20 portable charger has one of the best charging set-ups that we have seen with a power bank. There are a total of 4 Output charging ports.

Two Standard Charging Ports –

The two standard charging ports on his power bank each have a charging rate of 5V/3.0A. This is quite close to a Quick Charge speed, but it’s not Quick Charge, but higher on the standard charging speed scale. These two ports are perfect for standard devices that are not compatible with Quick Charge. It’s higher than the 2.4A ports that a lot of other flagship power banks tend to use.

Quick Charge Port –

There’s a Quick Charge port on this power bank and because of that, if you own a Quick Charge compatible device then we highly recommend that you purchase this charger. As it can charge either Quick Charge 3.0 or 2.0 compatible devices at their max charging speed. If you’re using a non-compatible smartphone with this Quick Charge port, then it’ll automatically just output 5V/3.0A.

USB-C Port –

The final port is the USB-C port and you can use a USB-C to USB-C charging cable to use this port to charge USB-C compatible devices. Or you can use a USB-C to Lightning cable to charge the iPhone X or iPhone 8 at a faster charging rate. This port has a charging rate of 5V/3.0A.

A surprising and awesome part of the USB-C port on this power bank is that you can use the USB-C port to charge USB-C compatible MacBooks. The USB-C port does not use USB-C Power Delivery, but even with its 15W charging rate, it can still charge a MacBook, just NOT at its max charging rate.

The max output of this power bank is 6.6A. So you can use the max power of 3 ports at once. However, if you’re using 4 ports at once, then it can result in lower charging speeds for the standard ports, as the Quick Charge port requires more power to be used.

Input Charging:

The recharging for this EasyAcc power bank is also another major part of it and that’s because there are two input ports. The use of two input ports is becoming the norm with most high capacity portable chargers and it makes sense to do so because it results in a faster full recharge. This charger has a Micro-USB input port and a USB-C input port.

The Micro-USB input port has a recharge rate of 5V/2.0A, while the USB-C input has a recharge rate of 5V/3.0A. Overall, that results in a full recharge rate of 5A, which can recharge this 20,000mAh power bank within 4.5 hours. That’s fast in terms of how much power capacity this charger has. That said, in order to recharge this power bank at its max recharge rate you have to make sure that one of the ports on your wall charger features a Quick Charge port to supply full power to the USB-C input and a standard port with a 2 Amp or higher charge rate.

Or you can just use one input at a time.

The USB-C input and output are both separate ports.


Size and Weight:

Most of the time when it comes to high capacity power banks, you end up with a portable charger that is very large and heavy. That time of those power banks is slowly going down as brands are getting better at making power banks more compact no matter how much power capacity they have.

This charger has a length of 5.9 inches, a width of 2.9 inches, and a thickness of 0.9 inches. The weight of the charger is 13 Ounces.

So is it larger than a 10,000mAh power bank? Yes, of course, but at the same time, this is much better than a 7-inch power bank that weights a pound and a half. In this case, it’s at least bearable to hold in your hand as it’s not too heavy and it’s about the same size as an iPhone 7.

Functional Components:

There’s a lot going on with this charger but it’s actually very easy to use because you don’t even have to press the power button to get charging started.

All of the Output charging ports are on a single wide side along with an LED flashlight. Yes, we cannot believe it, but somehow, EasyAcc still managed to still have a flashlight on this monster power bank. So charging start automatically with each of the ports, but when it comes to the LED light, you have to double tap the power button that can be found on the length of this power bank.

On the opposite long side is where you’ll find the Micro-USB and USB-C input port.

At the top of the power bank is where there are 4 Blue LED power capacity indicators. The indicators turn off after a few seconds of the power bank starting to charge and then turn off. You can check the power capacity by pressing the power button.


Structure and Material:

The entire power bank is made of plastic, and this is to be expected not only from EasyAcc but with most portable chargers. As even Anker, a leading brand also uses plastic with many of their power banks too. It holds up well with the charger not having any loose parts. That said, we would have liked to have seemed Aluminum with this charger as it’s one of EasyAcc’s best power banks that they have ever released.


With so many charging ports you would think that this charger would be overheating like crazy. But it doesn’t and that can be attributed to EasyAcc’s careful consideration of how to handle heat during charging. Even when you’re charging 4 devices at once with the max output being reached.


With all of its ports, charging power, recharging power, and power capacity, this is basically an ultimate power bank. At the same time, if you’re someone that doesn’t own a Quick Charge compatible power bank and don’t even own a USB-C charging cable, and just have an iPhone that you want to charge. Then it’s best to look for simpler alternatives.

As this power bank can be too good for its own good with all of its features. That said, if you do have a smartphone that is Quick Charge compatible, uses USB-C and you’re searching for a power bank that can charge multiple devices at once quite quickly, then this charger is for you.



Power capacity that can actually be provided to your devices can go down quite a bit but it’s a small price to pay for the 4 powerful output ports that it features. Another powerful part of this power bank is its use of two input ports and its 5A input recharge rate.


It’s not a mini power bank by any means but its size doesn’t exactly state that it’s a high capacity power bank. It’s also very easy to use with you not needing to press any buttons to actually begin charging.


The build quality of this charger is pretty good, at the same time we hope that EasyAcc does more premium feeling portable chargers in the future.


If you’re searching for a power bank that you want to use to solely charge your smartphone then we recommend not getting this power bank. There’s just so much, and you won’t be using all of it.

On the flipside, if you’re in the market for a high capacity power bank that has some of the best charging can offer, also to mention, the recharging, this one is definitely a great choice.

Specs of the EasyAcc MegaCharge D20 20,000mAh Power Bank Doubin 5A Input:

  • Capacity:

Initial Capacity: 20,000mAh

Output Capacity: 15,000mAh

  • Output:

Quick Charge Port: 18W and also standard 5V/3.0A charging rate for Non-Compatible Quick Charge devices

Standard USB-A Ports: 5V/3.0A

USB-C Port: 5V/3.0A

Max Output: 33W (6.6A)

  • Input:

Micro-USB Input: 5V/2.0A

USB-C Input: 5V/3.0A

Max Input: 5A

  • LED Power Indicator: 4 White LED Power Capacity Indicators
  • Size: 5.9 x 2.9 x 0.9 inches
  • Weight: 13 Ounces


EasyAcc focuses on quality, and this power bank is proof of that. They don’t have a plethora of portable chargers, but with the ones that they do have, this MegaCharge D20 20,000mAh power bank is one of the best in the high capacity category.

20000mAh Power Bank EasyAcc MegaCharge D20, USB C Quick Charge Portable Charger 5A Doubin Dual Input External Battery Charger for iPhone, Samsung, Nintendo Switch, MacBook and More - Black & Orange

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as of July 7, 2020 8:23 am


  • Multi-port Charging: 4 USB output port, 3 smart usb port one type-c port, available to fast charge 4 devices at the same time. 18W Qualcomm Quick Charge supported (Green Port).
  • Fast Recharge: Doubin Dual USB inputs, recharge with either usb c or micro usb port. Full recharge in 4.5 hours with dual input. Pass through charging compatible.
  • Two Type-C Port: Provide one way input or output independent, protect your devices from current flow backward while charging.
  • Strong & Compact: 20000mAh High Capacity delivers over 7 charges to iphone 8, 5 charges to Galaxy S8 and iPhone X, or 1.5 charges to iPad Air 2. More convenient as 20% smaller and lighter then other 20000mAh portable power banks.
  • What You Get: EasyAcc MegaCharge D20 20000mAh Power Bank, Micro USB Cable, USB-C Cable, User Manual, 18-month worry-free warranty and friendly customer service .

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