PISEN 20000mAh LCD Display Power Bank review. Pisen pro power bank

PISEN 20000mAh LCD Display Power Bank review

Energy has become one of our main needs these days, especially for those of us who are professionals or just like to use their tech gadgets all the time. The market nowadays is full of decent offers in terms of power banks, with battery capacities ranging from… a few hundreds mAh up to… 20.000 mAh for those power hungry!

PISEN is not a small company in this specific market segment, as they have become a Smart technology provider with leading global sales to over 200 million customers. For more than ten years, Pisen, known for its stable performance and user-friendly designs, has provided satisfying products for customers from 35 countries and recently they were kind enough to send us their most powerful energy “machine” known as 20000 mAh LCD Display Power Bank.

Here’s how it did during our lengthy trials

PISEN 20000mAh LCD Display Power Bank – Technical Specs

  • Model: TS-D199
  • Input: 5V2A
  • Output 1: 5VSmart 2A
  • Output 2: 5V1A
  • Size:161 x 83 x 63 mm
  • Weight:475g
  • Charging Time:11hours via 2A charger (charger is not included)

You can download its official manual here. (PDF)

ULTRA-LARGE CAPACITY

Its main feature is the 20,000mAh capacity, that can provide enough charging power to fully charge one iPhone 7 for almost 7 times, a Galaxy S8 flagship for more than 4 times and the huge iPad Air 2 for 1.5 time.

No doubt however that we’re talking about a heavy power bank that weighs a bit less than half a kilo (475 gr.) so it’s not something that you can easily carry on your. or in a small purse. I use it in my back pack, that has an external USB port for direct charging my phone – when necessary- and this way it’s not causing any issues when travelling or walking in the city.

DUAL USB OUTPUT

This is something that can surely make your day in case of… need. It comes with Dual USB Ports (2A1A Output), that are able to detect your device intelligently and deliver the optimal charging (Up to 2A Max).

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LCD DIGITAL DISPLAY

Yepp, this is a feature I really enjoyed using. The PISEN 20000mAh LCD Display Power Bank comes with a pretty accurate LCD display, that shows you the remaining power in percentage – 1% accuracy minimum. It also shows which port you’re using at each time (OUT1 – OUT2) and it has a Smart function that can annoy you, when it needs to be recharged.

To activate the LCD display you just have to long press the power button for 2 seconds. Don’t worry about energy consumption, as the backlight goes out in 15 Seconds to save energy.

easy to use display, with 1% accuracy

CHARGE DISCHARGE SWITCH

So how do we turn the juice on? Juts connect the power station with your device and power supply simultaneously with the micro USB cable provided (if your phone supports it) or your own cable (Lightning or USB Type-C). When you’re done, long press the power button for 2 seconds to switch the charging discharging mode freely.

That’s all, the charging procedure will begin

COOL UNDER PRESSURE

The battery pack uses exclusive technology developed by Pisen engineers to control its temperature when charging. If high temperatures are detected then it automatically modifies power output to reduce heat. It also has a security feature that can spot any short-circuits and cut-off charging procedure for protection.

According to the manufacturer, the Pisen 20000mAh external battery charger provides over-charge, over-discharge, over-heat, over-voltage, over-current and short circuit protection. This means that in any given situation you will be protected if something might go wrong with a cable, an over-charge of your smartphone/tablet or just a mishap.

Our opinion

With a starting price tag of just 28 this massive 20000 mAh power bank from Pisen proved to be decent for its money’s worth, fulfilling completely all my charging needs for my smartphone, laptop and my wife’s phone as well, with one single charge.

It takes quite sometime to charge it with a 2A charger (11 hours per average) but then you will be able to use it for several days with no issues. It offers impressive performance in everyday use, quite good quality build (with faux leather design) and you can find it available in two colors: white and black.

Nick

Always on the move. Like to blog, write about smartphones, technology and telecoms. I love snowboarding, movies and spending time with people I care about. If you’d like to know more you can always follow me on

Things You Need to Know Before Buying A Power Bank

Back in 2001, the prototype of a power bank appeared in CES. Since then, the power bank market has grown phenomenally and today, you can find hundreds of different brands on the market. There are so many to choose from, with capacities ranging from 500mAh to 30,000mAh, single or multiple USB ports, with or without a flashlight, etc. Earlier this year, several mobile phone manufacturers including Xiaomi, Samsung and Nokia launched their wireless power banks, making the market even more competitive.

The choice is bewildering, and it’s not like you can just ‘fish a power bank out of the sea’. Yes ok, there are lots of tips and guides out there, but today we are going to see how the tech gurus make their choice. You might even get a fringe benefit.

What Does A Quality Power Bank Look Like?

The easiest and quickest way to judge the quality of a power bank is to check the quality of its case. What materials are used? How well is it designed? Are there any signs of damage? Is the button easy to press?

A quality power bank should have:

1) A clean and complete surface, nothing out of shape. There should be no signs of mechanical damage, no corrosion on any of the connectors.

2) Clear markings about the power ratings, avoid anything blurry that you cannot read.

3) Make sure any buttons and lights work correctly.

It Should Have These Numbers

Every power bank should have markings which clearly state what the power ratings are. That will help you to understand if it can properly charge your phone or not.

1) The basic information should be illustrated on the product or in the user manual; this usually includes the capacity, model number, product type, manufacturers’ information, etc.

2) The Rated input voltage/current and the output voltage/current information is fundamental. But what do these numbers mean? The rated input tells you the standard voltage that the power adapter can connect to so that it can charge the power bank.

If you lose the original power adapter, you could buy a third party one that matches instead of the original. The rated output has to match with the output voltage of the original power adapter for your phone. It’s not recommended to charge your phone with a power bank that has different voltages; otherwise, you may well damage your phone.

3) How many times can the full power bank charge my phone? That’s the question a lot of you will want to know. Usually, that sort of information is not written on the power bank, but with rated capacity and cell/battery rated energy, you can do the math yourself. Don’t worry. We will get to that later.

4) Last but not least, the markings about safety certification are also significant. Most electronics products will bear signs of CE, RoHs and FCC. CE and RoHs are required if the product is sold in the EU; while FCC is mandatory for US market. Safety is somehow guaranteed if you see those marks on the power bank.

You will probably find other markings too, such as environmental information. If you are passionate about these environmental factors, you might want to choose a power bank with a ‘cyclic regeneration mark’ which means that it is recyclable.

Know the Conversion Game of Power Banks

You probably know that bigger capacity is better since it can provide more energy. The thing is, there are two different types of capacity: battery capacity and rated capacity. What you usually see on power banks are the battery capacity. What’s the difference between those two numbers? Let’s read on.

1) How many times can the power bank charge your phone?

If a power bank is marked as 10,000mAh 3.8V (38Wh), that means its battery capacity is 10,000mAh, the voltage of the battery core is 3.8V, and the battery core energy is 38Wh.

Rated capacity (mAh): Also known as nameplate capacity, is the least output capacity under the rated voltage and current.

For example, the rated capacity of a power bank is 7,000mAh (TYP5.1V 1A), that means the minimum output capacity of the power bank is 7,000mAh in the charging process with 5.1V and 1A output standard.

Conversion efficiency: This indicates the value difference between the battery core energy and rated capacity.

A power bank has a battery capacity as 10,000mAh; the battery core voltage is 3.8V which will increase to 5.1V when it’s charging a phone. So, in theory, its output capacity is:

10,000 3.8 / 5.1 = 7,450mAh

The rated capacity is 7,000mAh (TYP5.1V 1A), so the rated conversion efficiency is:

7,000 / 7,450 = 93.96%

In other words, the energy conversion efficiency is about 93.96%, with a 5.1V 1A output standard. About 6.04% of the power is lost in the conversion. If you use professional tools to test the rated output capacity, the result would not be too different. The conversion efficiency of most of the power banks on the market are between 80~90%. Therefore, a power bank with 10,000 battery capacity has about 6,000~7,000 rated output capacity.

Charging rate: 7,000mAh (rated capacity of the power bank) / 3,110mAh (capacity of the iPhone 11 battery) =2.25

Therefore, it can charge your iPhone 11 twice at best.

2) How long will the power bank last?

The lifespan of a power bank depends on two things: how well the power bank is made and how much you use it. The number of charge-discharge cycles, decided by the battery core and other vital components, varies amongst power banks. Typically, this is between 300 ~ 1,000 cycles and if you want my advice, you should definitely avoid any power bank that has less than 500 charge cycles.

Say, the power bank has 500 charge cycles, and you fully charge it once per day on average, then how long it will last? We can work that out with the following simple formula:

Power bank lifespan = Charge cycles charging rate / using rate

Where ‘Using rate’ is the number of times you charge the power bank fully in a day.

As mentioned above, for a 10,000mAh power bank, its charging rate is about 2.25. If it has 500 charging cycles, its lifespan is:

500 2.25 / 1 = 1125 days = 3.08 years

But where can these charging cycles be found, you may ask? The test of cycle life involves specific equipment, so for now, we’ll just have to skip that.

But, if you really want to know, ask the seller before you purchase. Even if you don’t get an answer, as you can see from the above example, the power bank will last longer if it has more capacity and a lower use rate. So, it makes sense to go for a big power bank and use it slowly, that way, you should be able to keep for a couple of years if not more.

3) How long does it take to charge the power bank or the phone fully?

Now comes the easy part. The charging time depends on the capacity of the powered device (PD) and its input current which equals the output current of the power sourcing device (PSD)

Charging time = battery capacity / actual input current.

Take a 10,000mAh power bank to demonstrate. Its rated input is 5V/2A, so if you use a 5V/1A power adapter to charge it, its actual input current is 1A=1,000mAh. 10,000mAh /1,000mAh=10 hours. If you use a 5V/2A power adapter, it takes 5 hours to fully charge the power bank: 10,000mAh / 2A (2,000mAh) = 5 hours.

Same for charging the phone. If your phone battery has 4,000mAh capacity, and the maximum output current of the power bank is 2.5A (input current for the phone is 2.5A) then it takes about 1.6 hours to fully charge your phone with the power bank.

How Safe is the Power Bank?

You cannot be too more careful with electronic devices, including power banks. They should have protection mechanisms to prevent any danger caused by electricity.

There are several underlying protection mechanisms: over-current protection, under-voltage protection, short-circuit protection, over-temperature protection and overvoltage protection. This information can usually be found in the user manual.

What’s the Purpose of Power Banks?

By now, you are probably a power bank expert to some extent. But can you count on all those numbers to consider a purchase? Not really. Knowing everything about a power bank can help you decide the quality, but the quality is not the only standard to define a “good” product. It also has to do what you want.

Yes, high-capacity power banks have a longer lifespan and higher charging rate, however, a high capacity also means a bigger size. Do you want to carry a bulky phone power bank in your small bag? Some of you will be shaking your head. If you want to carry an emergency power supply for your phone when you are out shopping, then a small-sized power bank is best. However, if you are a selfie addict, an extra 30% energy from the power bank may not be enough for your day out. You see, everyone has different needs.

Therefore, the first step to select a power bank is to figure out what kind of power bank you want, then compare power banks of the same type with what you’ve learned above.

If you happen to be looking for a power bank for an emergency power supply, check out this recommendation –

PITAKA MagEZ Battery Pack, a MagSafe compatible wireless charging power bank.

The MagEZ Battery Pack is a perfectly formed, small-sized, wireless power bank with 4000mAh capacity that can provide an additional 60% energy for your iPhone 14, perfect for your everyday carry and emergency use. With magnets embedded within, it matches flawlessly with MagSafe phone cases. It can auto attach and align with your iPhone 12, iPhone 13, and iPhone 14 series, safely and securely.

importantly, the MagSafe battery pack is compatible with our MagEZ Slider, a multi-device charging station that can work as a phone stand and charges your phone and Airpods. With the Slider, you can slide the power bank in the dock when it’s not used, so you won’t misplace or forget to charge the power bank anymore.

In conclusion

You don’t have to be a tech guru to select what you want but, you should know the essential tech behind a power bank if you are going to buy one. Don’t be fooled by the salesman, do your research and you have a bigger chance to get a power bank that’s worth it. Nothing could go amiss.

What Is a Power Bank? Everything You Need To Know About Charging On The-Go

Running out of battery can be a big problem, especially when you might not have access to a wall outlet to charge your phone. Cue power banks! A power bank can keep your phone full of battery without an outlet, so you’ll never have to miss a selfie opportunity or a call from your mom. It’s time to get charged up to learn all about power banks, from their purpose, the different types, and why you need one!

What is the Purpose of a Power Bank? Top

The purpose of a power bank is to recharge battery-powered electronics when you’re on-the-go! A power bank can be small enough to fit in your or they can be larger with a higher capacity.

Power banks are used to charge cell phones, tablets, speakers, and even laptops! If you can plug it in a wall to charge, chances are a power bank can charge it.

When Was the First Power Bank Made? Top

The first portable power bank was created in 2001 by a Chinese company called Pisen. The original design was two AA batteries pieced together by a circuit! It made its public debut at the Las Vegas International Consumer Electronics Show.

The first power bank was bulky and had a short battery life. Today, there are much more sophisticated and compact designs with far superior battery life. Most modern power banks can fit in the palm of your hand and charge your smartphone several times before running out of battery.

Who Invented the First Power Bank? Top

The first power bank, the Power King, was invented by a Chinese company called Pisen. An Antarctic Expedition Team requested a portable charger for their video cameras and other devices. Cold temperatures would compromise the battery life of their equipment, so a power bank was a necessity for the trip.

What Are the Different Types of Power Banks? Top

Power banks come in a variety of different shapes and sizes. Some power banks have multiple uses in addition to charging your electronic devices!

The different types of power banks include:

  • Block power bank
  • Credit card power bank
  • Keychain power bank
  • Wireless power bank
  • Flashlight power bank
  • Speaker power bank
  • Novelty power bank
  • Bluetooth earbud power bank
  • Lantern power bank
  • Solar power bank
  • High capacity power bank

Block Power Bank

Block power banks are one of the most common types of portable chargers. The blocks can come in the shape of a slim rectangle, a log, or a wider rectangle. This type of power bank is great for keeping in your bag or backpack for those moments when you need some extra juice on-the-go.

Credit Card Power Bank

A credit card power bank is a portable charger with a slim rectangular design, hence its name. This kind of power bank fits comfortably inside your without feeling bulky. The discreet design allows you to slip it inside small places like a wallet or padfolio without taking up a ton of room.

pisen, 20000mah, display, power, bank, review

Keychain Power Bank

You never know when you might find yourself with a phone on low battery and no wall outlet. A keychain power bank is compact enough to add to your keyring and take with you everywhere! The next time you need a quick charge, you’ll have your power bank easily accessible.

Wireless Power Bank

Keeping track of cords can become a nuisance. A wireless power bank works by simply resting the back of your phone on top, and letting your battery charge. Before you get a wireless power bank, be sure your device is compatible with this type of charger.

Flashlight Power Bank

If you go camping, fishing, or hiking, a flashlight power bank is a necessity. Not only does the flashlight provide safety at night, but it can also charge your phone. It’s also a good idea to keep a flashlight power bank in your home in case of a power outage.

Speaker Power Bank

Next time you head to the beach or to a picnic, don’t forget to grab a speaker power bank. Keep your phone charged while listening to your favorite playlist with this compact power bank. It’s also handy for bike rides or while working on an outdoor project.

pisen, 20000mah, display, power, bank, review

Novelty Power Bank

There are some power banks that don’t look like a power bank at all, like this Rubik’s Cube! The best part is you can twist the colored blocks while your phone charges. It’s still compact and fits in the palm of your hand, so you don’t have to worry about running out of space in your bag.

Bluetooth Earbud Power Bank

This power bank not only works as a portable charger for your phone, but it’s also a port to store and charge wireless Bluetooth headphones! One end of the power bank has the connection to charge your device, and the other has two slots for the earbuds.

Lantern Power Bank

Anyone who is outdoorsy will want a lantern power bank. Use the light when you need it, and then charge your phone at the same time. With this power bank, you can use a charging cable, or you can place your phone on top to wirelessly charge it.

Solar Power Bank

Go green with a solar power bank! Leave your power bank in the sun to charge it up, and then connect it to your phone. A solar power bank is great to use over an extended period because you don’t have to worry about needing a wall outlet to recharge it.

High Capacity Power Bank

High capacity power banks provide a lot of power and have a battery with 20,000 mAh or higher. These power banks can charge multiple devices at once, or one device multiple times before needing to be charged.

There is truly a different type of power bank to satisfy every need. Whether you end up having one favorite or multiple models for different occasions, a power bank is always a good item to keep on hand.

What Does mAh Mean? Top

mAh means milliamp hour. It is a unit of measurement used for electric power, specifically for batteries. A battery that has a higher mAh will have more power and battery life.

For rechargeable batteries found in power banks, the mAh shows how much charge the battery can hold, and how long it can power another electronic before needing to be charged.

How Do I Know My Power Bank Capacity? Top

Before you invest in a power bank, you’ll want to know how long the battery will last. Knowing the capacity of your power bank will help you make sure you get one that will meet your needs. Use the equation below to find the approximate battery life of your power bank.

If your power bank has 10,000 mAh, you would divide that by the mAh of the device you want to charge. A quick online search can tell you the mAh of your device if you aren’t sure or can’t find the battery. For example, an iPhone XS uses a 2,658 mAh battery. Using the equation, it would take 3 hours and 7 minutes of charging your iPhone XS before your 10,000 mAh power bank ran out of battery life.

Which Type of Power Bank is Best? Top

The best type of power bank will have a mAh that is higher than the device you want to charge. The larger the battery is on your phone or other electronic device, the more power you’ll need from your power bank to charge it.

For example, if your electronic device has a battery with 2,000 mAh, you’ll want to get a power bank that has at least 2,000 mAh or more. That way, you’ll be able to get at least one full charge for your device without having to recharge the power bank.

What Is the Difference Between a Power Bank and a Portable Charger? Top

There is no difference between a power bank and a portable charger. Both names can be used to refer to the exact same battery pack you use to charge a device.

A power bank has several nicknames including:

  • Battery pack
  • Fuel bank
  • power cell
  • Back-up charging device
  • Wireless charger
  • Portable charger

Regardless of the name you want to use for your power bank, you’ll be thankful you have it handy when your electronic device needs some extra juice!

What Power Banks Are Allowed on Planes? Top

According to the Transportation Security Administration, power banks containing a lithium ion battery must be packed in a carry-on bag. The reason why power banks are not allowed in checked bags is because the battery contains potentially hazardous flammable materials.

The Federal Aviation Administration (FAA) does not allow any type of battery onboard an aircraft that exceeds 27,000 mAh. Keep these guidelines in mind before flying and be sure to properly pack your power banks!

What Are the Advantages of Power Banks? Top

Now that you know what a power bank is, you might be wondering if a power bank is worth it. There are several advantages to having a power bank you should consider before getting your own.

The advantages of power banks include:

Easily Portable

Most power banks can fit in the palm of your hand, making them easy to take with you anywhere! You won’t have to worry about it taking up too much space in your bag or

Customizable

Power banks come in a variety of colors and styles you can choose from. You can also add different designs to your power banks to make it your own.

Affordable

You don’t have to spend an arm and a leg to get a quality power bank. Most power banks are under 20 and will keep your phone charged whenever you need it.

Reusable

Each time you need to charge your electronic devices, you don’t have to get a new power bank. You can recharge and reuse the same power bank over and over.

Fast-Charging

We don’t always have time to wait for our phone battery to charge. Thankfully, you can take a power bank with you to quickly charge your phone on-the-go.

Reduces Worry of a Dead Cell Phone

No matter where you are, you won’t have to worry about your phone running out of battery as long as you have a power bank handy.

Power banks are an accessory worth having! If you have smartphone or other electronics that you need to keep charged, then you’ll want to have a power bank with you.

The Bottom Line

A power bank can make a huge difference while camping, traveling, or attending a festival. It can help prevent your phone, tablet, or other electronic device from running out of battery. You never know when you might be stuck without a wall outlet, so keeping a power bank nearby can save you in the long run.

Esposito, Felipe. (2019, September 17). iPhone 11 and iPhone 11 Pro have up to 3,969 mAh battery capacity and 4GB of RAM. Retrieved on March 3, 2020, from https://9to5mac.com/2019/09/17/iPhone-11-and-iPhone-11-pro-battery-size/

Bryan. (2020, February 4). What Does mAh Stand For in Batteries? Retrieved on March 3, 2020, from https://www.powerbankexpert.com/what-does-mah-stand-for-in-batteries/

SWICAD. (2018, September 17). History of the Power Bank. Retrieved on March 4, 2020, from https://medium.com/@swicaid/history-of-the-power-bank-262684b706a6

Brease, Tom. (2017, November 13). Pisen: From power bank invention to power bank innovation. Retrieved on March 4, 2020, from https://www.gizchina.com/2017/11/13/pisen-from-power-bank-invention-to-power-bank-innovation/

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