ZMI PowerPack 20k Pro (QB820) Rev... 8 RATING POWERUP
8 POWER UP GUIDE
RATING
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ZMI PowerPack 20k Pro (QB820) Review

8

SCORE

An incredibly powerful 20,00mAh pack capable of powering laptops


OVERVIEW

Performance + Capacity 9
Design 8.5
Recharge Time 8.5
Value for Money 7

POSITIVES

  • Powerful enough to charge large devices such as laptops
  • Tremendous efficiency at various power loads
  • Wide range of fast charge protocols
  • Hub functionality
  • High quality build and finish

NEGATIVES

  • Expensive

BOTTOM LINE

The ZMI Powerpack 20k Pro is a premium portable charger in the 20,000 milliamp category with a massive 65 watt output capability. Aside from that, it supports a majority of fast charge protocols including Programmable Power Supply (PPS) which is rare in most packs. This means that aside from being able to fast charge most common smartphones such as the iPhone 11 series and the Google Pixels, it can also utilize fasting charging on newer Samsungs like the Samsung S20 and Samsung Note20 Ultra. For these features though, it comes at an expensive price point of $90.

 

8

SCORE
Power Up
Rating

TECH SPECS:

Ports: USB-C, USB-A x2
USB-C Output:

  • 65W USB-C Power Delivery 3.0 (5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/3.25A)
  • PPS 5-11V/4A
  • Apple 2.4A

USB-A Output:

  • 18W Quick Charge 3.0
  • Samsung Adaptive Fast Charging
  • Huawei FCP
  • Apple 2.4A

Input: 45W USB-C PD (5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/2.25A)

Table of Contents

The ZMI Powerpack 20k Pro is a strong contender in the 20,000 milliamp category, being able to utilize a maximum of 65 watts of output. This means that aside from charging your smartphone, Switch or tablet, it can also charge your laptop. This makes it a good daily carry option especially for individuals always on-the-go. This power bank is a heavy duty portable charger capable of 65 watt hours of output. This means that it can charge bigger devices like laptops unlike other packs like those in the 10k category that can only charge smartphones and tablets. Aside from its massive watt output, the ZMI Powerpack 20k Pro boasts of supporting a wide range of fast charge protocols including Power Delivery 3.0, Samsung Adaptive Fast Charge, Huawei FCP, and the rare Programmable Power Supply. It has other features as well such as pass-through charging and a USB hub function that makes it a great all-around portable charger for all your devices. With all of these features though comes a very steep price point of $90. Compared to other 20k packs such as the Xiaomi 20k Pro, this is definitely on the expensive side. Will its performance justify its price? Let’s find out.

FIRST IMPRESSIONS

C0011(2).00_04_22_11.Still069 The ZMI Powerpack 20k Pro is quite a heavy power bank weighing 436 grams with dimensions 160mm x 81.8mm x 21.1mm. It has an anodized aluminum finish which gives it a premium feel and other interesting design components such as a gold button on the side along the four indicator lights. With this finish though, we noticed that it seems to scratch easily so you should definitely keep that in mind. It has three output ports: two USB-A and one USB-C which means that you can charge multiple phones or devices at the same time. As for specifications, see them below: Ports: USB-C, USB-A x2 USB-C Output:
  • 65W USB-C Power Delivery 3.0 (5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/3.25A)
  • PPS 5-11V/4A
  • Apple 2.4A
USB-A Output:
  • 18W Quick Charge 3.0
  • Samsung Adaptive Fast Charging
  • Huawei FCP
  • Apple 2.4A
Input: 45W USB-C PD (5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/2.25A)

CHARGE CAPABILITIES

C0011(2).00_00_28_03.Still059 The ZMI Powerpack 20k Pro is compatible with a huge array of fast charge protocols: Power Delivery 3.0, Samsung Adaptive Fast Charge, Huawei FCP, and even Programmable Power Supply which is hard to find in power banks. This means that it can utilize fast charging on most smartphones including the iPhone 11 series, Google Pixels, LG phones, and even the newer Samsung phones such as the Samsung S20 and Samsung Note20 Ultra. The only phones that won’t be able to utilize this fast charging feature are those likely using Warp, Dash, or Huawei SFP like the OPPO Reno and the Huawei P40 Pro and Huawei Mate Xs. C0011(2).00_00_25_13.Still057 Aside from its tremendous range of supported fast charge protocols, this power bank has other convenient features such as a USB hub function that makes it possible to charge your laptop as well as act as a dongle which is especially useful for Macbook owners. This power bank is also capable of pass through charging which means that it can charge two to three devices at the same time, and can keep your phone alive for days on end so it is definitely an all-around portable charger.

ZMI QB820 CAPACITY AND PERFORMANCE (TESTED)

C0011(2).00_00_15_17.Still062 To see how it performs in reality, we tested the ZMI Powerpack 20k Pro on its efficiency across different power loads. This is to check if it actually has good performance at different levels of output. For reference, the stated internal capacity of the pack is 72 watt hours. Starting at 9 watt hours, the ZMI gave a great result of 92.8% efficiency being capable of 66.88 watt hours compared to the 72 watt hours as stated by the manufacturer. Compared to similar packs like the Xiaomi 20k Pro (which gave a result of 93% efficiency), this is definitely very impressive. C0011(2).00_00_24_17.Still071
Now at 18 watt hours, the ZMI delivered another impressive result of 95.2% efficiency or 68.56 watt hours. This is amazing since 18 watts of output is a real sweet spot for charging smartphones which proves that this power bank can definitely power up your phone tremendously at almost every inch of its 20,000 milliamp hour capacity.
Next, at 30 watt hours, the ZMI QB820 gave another high result of 92% efficiency which is 66.2 watt hours. Again, compared to the Xiaomi 20k Pro (which had a result of 85% efficiency), we can see that it is definitely holding up better than other similar power banks out there. C0011(2).00_00_28_03.Still059
Now at 45 watt hours, the ZMI QB820 put out a great performance level of 86.6% efficiency being capable of 62.3 watt hours. This proves that it has tremendous efficiency and that it could power up larger devices such as laptops for a decent amount of time.
Finally, at its maximum capacity of 65 watt hours, the ZMI QB820 gave a good result of 78.2% efficiency at 56.31 watt hours which shows that it is definitely an incredible power bank. Compared to other packs like the Xiaomi 20k Pro, it proved to have superior efficiency starting from the 30 watt hour mark. It also proved to be a great daily carry option for those who want a heavy duty power bank that can charge all their devices from their smartphone to their tablet to their laptop. C0011(2).00_00_27_17.Still063

SHOULD YOU BUY THE ZMI QB820?

C0011(2).00_00_02_26.Still064 If you are looking for a power bank to charge laptops, multiple devices, or keep your phone alive for days then this is definitely the pack for you. It has great performance across different power loads and is compatible with a wide range of fast charge protocols. This means that it supports fast charging in most typical phones like iPhones, Samsungs, and Google Pixels. The only phones it won’t be able to fast charge at the quickest rate possible or at maximum speed are those likely using Warp, Dash, or Huawei SFP like the OPPO Reno and the Huawei P40 Pro and Huawei Mate Xs. However, if you are only looking for a power bank to charge just your phone and mid-size devices like iPads or tablets, you will do better off with a cheaper alternative like the Xiaomi 20k Pro which is half the price of the ZMI Powerpack 20k Pro’s high price point of $90. asdf

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