Tronsmart PB20 Power Bank Review – 20000mAh Portable Phone Charger

An ultra-compact high capacity power bank with an impressive efficiency rate and recharge speed.

The Tronsmart PB20 Portable Power Bank with a 20000mAH capacity

Tronsmart PB20 Power Bank 20000mAH – Overview

This high capacity external battery features an LED display, Type-C USB and Dual inputs for fast charging. The Tronsamart PB20 Power Bank is quite possibly the most compact 20000mAh portable charger on the market.

Price and Availability

Power Bank Model
Tronsmart PB20 Portable Charger
Charging Capacity
Samsung S10 3.5 Full Charges | iPhone Xs4.5 Full Charges | iPhone 8 6.5 Full Charges
Features
LED Digital Display, 20000mAh Capacity, Dual Inputs, Dual Outputs, Type-C USB, Ultra-Compact
Buy From
*Price last updated on the 17th of July 2019 at 09:00 am GMT
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to this product.

Full Review

After years of reviewing high capacity power banks, I’ve accumulated enough to fill up two shoe boxes.  Of the dozens of units, only a few of them ever get used. The criteria for cherry-picking my favourites usually come down to just two factors – the physical size of the power bank and how efficient it is. Those two factors are the reason I was eager to get my hands on the Tronsmart PB20.

Size Matters

For a 20000mAh Power Bank, the PB20 is amazingly compact. I’d go as far as to say it’s pocket-size. Just take a look at it alongside some other portable chargers with exactly the same output.

The Tronsmart PB20 Powerbank compared in size to some other portable phone chargers

As you can see, the Tronsmart PB20 power bank is significantly more compact. Along with the reduced size, the PB20 has generously rounded edges and corners to make it extremely comfortable to carry on your person.

Here is another comparison view from the front. It’s so much smaller than the others that I was sure it would fall short on the number of full phone charges it provided.

A high capacity power bank size comparison

Other Power Banks in the picture above
EasyAcc 20000mAh Power Bank | Ravpower RP-PB043 | Aukey 20000mAh Power Bank

Tronsmart PB20 Power Bank – Design & Build Quality

The PB20 feels extremely robust and the ABS plastic housing seems very resistant to surface scratches. It has a matte black finish with a subtle hatched texture on the underside.

The build quality of the Tronsmart PB20 portable phone charger

There is a singular button neatly recessed on the right-side that will light up the digital display when pressed. Unlike most other power banks which use four LED lights to show the battery life in 25% increments, the PB20 gives accuracy to the nearest 1%. This comes in very useful when using a high capacity portable charger.

The Digital display on the Tronsmart PB20 power bank

Alongside the digital display, there is a micro USB input and a standard USB-A output port. All the ports are tight-fitting and cables insert snuggly inside. I have absolutely no complaints regarding the overall build quality of this power bank.

Tronsmart PB20 Power Bank – Features and Specifications

Tronsmart 20000mAh power bank specs

Capacity Inputs Outputs Recharge Time Size Weight
20000mAh Micro USB / Type C USB 1X USB A (max 3.0A) Type-C USB (max 3.0A) 6 Hours 137mm x 68.5mm x 26mm  342g

Safety Features

The Tronsmart PB20 has multi-protection measures to protect it and your devices from over-current, over-charge, short circuits, and over-discharge issues.

Dual Charging

By using the Micro USB and the Type-C ports, the PB20 power bank can be fast-charged using two cables at the same time.

The Type-C USB port can also be used together with the USB-A output to charge two devices simultaneously. You are limited to a total output of 3A, which will be adequate for charging two phones. If, however, you’re charging a tablet or iPad and a phone at the same time, it’s going to take a little longer.

Performance and Efficiency

I got just under 5 full charges of my Samsung S7 Edge phone. Yes, I know it’s old, but it serves me well, and the 3600mAh battery is still bigger than most other flagship phones. Now, with a little math (4.9x3600mAh=17,640mAH) this means I achieved an efficiency of 88.2%. This is almost exactly what Tronsmart suggest their PB20 power bank can achieve and is at the very top end of what you’re going to get from any other portable charger on the market.

– If your an iPhone 8 owner, you’ll easily get over 6 full phone charges for this Power Bank.

Verdict

I really like this power bank for two main reasons – its size and its charging efficiency. The Tronsmart PB20 is great value for money and ideal for anyone looking for an ultra-compact high-capacity charger to keep a smartphone topped up for extended periods.

That said, if you need to charge multiple larger devices such as tablets, iPads or a MacBook Pro, then this power bank probably isn’t ideal for your needs. You’ll need one with a larger maximum output. You can easily find a suitable one on our list of the Best 20000mAH power banks. – Side Note: The Tronsmart PB20 will most definitely feature on it in the very near future!

Price and Availability

Power Bank Model
Tronsmart PB20 Portable Charger
Charging Capacity
Samsung S10 3.5 Full Charges | iPhone Xs4.5 Full Charges | iPhone 8 6.5 Full Charges
Features
LED Digital Display, 20000mAh Capacity, Dual Inputs, Dual Outputs, Type-C USB, Ultra-Compact
Buy From
*Price last updated on the 17th of July 2019 at 09:00 am GMT
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to this product.

2 COMMENTS

  1. Hi Simon Just read your reviews on the Tronsmart T6 Bluetooth speaker,
    And have now just read your review on the Tronsmart pb20 and was wondering if you used the PB to charge the speaker if so is it worth purchasing for this purpose amongst other uses. By the way I have just purchased the Speaker, just on your review which I thought was excellent.

    • Hi Alex, The PB20 Power bank is really great, I took it on holiday with me along with another 20000mAh charger, it definitely outperformed the other one. The T6 speaker is a cool speaker for the price, I’m sure you’ll be pleased, Trosmart makes some really nice products at good prices, I also use their Bluetooth neckband headphones, they have been awesome. Have a great day 🙂

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