Best 20000mAh power banks
Next to 10000mAh power banks, the 20000mAh ones are some of the most popular capacity models. They are perfect for people that want a bit more range than the 10000mAh chargers provide, but still want to have a relatively lightweight and portable device.
If for example, on a 10000mAh power bank you can charge an average smartphone 2-3 times, with a 20000mAh power bank you can increase that range to 5-6 times. Not to mention the fact that you can charge a laptop such as the MacBook Pro around 2.5 times, provided they have the right amount of output power.
In this curated list we strived to include some of the best 20000mAh power bank models available today. Depending on your needs you might find some to be more suitable than others. What we looked for in these devices was for them to have some of the latest and best charging technologies possible.
How we made our picks
First of all, all the power banks on the list have been physically tested by us. We’ve actually used them to charge devices in real life. This way we got insights that are not present on the manufacturer’s presentation pages. But here are some of the exact features we kept a close eye on, besides the 20000mAh capacity:
- Fast charging technologies. This is a key feature when it comes to a decent-sized power bank like the ones on this list. First of all, you don’t want to wait for ages to charge your phone, and similarly, you don’t want to wait hours on end to charge the power bank itself.
- Size and weight. 5000mAh and 10000mAh power banks are usually so compact that you don’t even notice you them on you. But when you get to 20000mAh, weight, and size tend to become very noticeable. So we prioritized power banks that rank better on portability.
- Multiple ports. Power banks this size have the ability to charge a smartphone at least 4-5 times. That’s quite a lot of charge that at some point you might want to share, or maybe you’d like to charge several different devices simultaneously. That’s why we considered that power banks with more charging ports are generally better.
- Built quality. Like most other products, power banks come in different quality levels too. You can get very cheap ones from no-name brands with low-quality standards, or you can get a portable charger from a brand that is known for its quality. You will pay more for the extra quality, but that will make all the difference, especially considering the potential downsides. In this list, we only included high-quality products.
With all this being said, here are the models we’re currently recommending.
Top 20000mAh Power Banks
INIU BI-B5 20000mAh Power Bank
- Capacity: 20000mAh
- Max output: 22.5W
- Ports: 1 USB type C, 2 USB type A
- Fast charging: PD 3.0, QC4.0
- Weight: 12.8 oz / 362 g
- Recharging time: 6 hours
- Price: ~33 (actual price might vary)
- mAh/ ratio: 606
We believe that the INIU BI-B5 is one of the best 20000mAh power banks you can buy today considering the features it comes with and its price. First of all, it features a PD3.0-compatible in/out USB type C port that can deliver up to 20W. Besides that, it comes with 2 USB type A ports that are QC4.0-compatible. It’s worth noting, that there are currently very few power banks that can provide QC4.0 on their charging ports. This is one of the very few that feature this new charging tech.
Because of the QC4.0 feature, the USB type A ports can deliver an amazing 22.5W each. You’ll have a very hard time finding power banks that can deliver this much power from their USB type A ports. This, you’ll be able to charge your devices blazingly fast with the BI-B5 portable charger.
One key feature that sets it apart from a lot of other power banks in this segment is the LED display screen. The majority of its competitors simply come with 3-5 LED lights to show charging levels. These individual lights can be quite vague and you’re never sure of the exact level. But with this display screen, you’ll know precisely how much charge there is in your power bank at any given time.
Last but not least, the BI-B5 also features a handy flashlight. It’s a quite powerful one too! You’ll be able to use it to navigate your way through dark environments. Even though it might not be a key feature that you might be looking for, you can never know when something like this will be of actual help.
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.
URBN 20000 mAh Li-Polymer Power Bank
The 20000 mAh Li-Polymer Power Bank from Urbn has a high capacity lithium polymer battery at its core, which gives you the same performance charge after charge. With its 2.1 Amp fast charge feature, you can simply avoid staying plugged in for hours on end. Unlike regular power banks, this power bank has BIS certification validation that makes it perfectly safe for travel. This clubbed with its high capacity battery and compact size, make it the perfect travel companion. The power bank has sharp LED lights on the body to tell you the power status of your power bank so that you can plan your usage and next charge.
This efficient AmazonBasics Power Bank is another great one that you can buy online. Not just smartphones, it can even be used for charging Mp3 and Mp4 players, tablets and digital cameras. It has a charge retention feature so that the battery does not get exhausted while the power bank is not in use. This power bank even has an LED indicator that shows the amount of battery your power bank is left with and when you need to recharge it. Fast charging, high-quality circuits and lots more, this power bank offers almost everything that you can ask for.
Ambrane 20000mAh Lithium Polymer Power Bank
This compact and durable power bank from Ambrane is another good option that you cannot carry with you even on long journeys. This power bank comes with dual input port options. Micro USB and Type-C. So, if you have a Type-C mobile, you do not have to carry two cables wherever you carry the power bank with you. Its rubber and scratch-proof finishing ensures that it continues to stay looking good for a long time. The outer body of the power bank is made up of strong ABS plastic material, which not only gives a stylish premium finish to the product but also makes it more durable and resistant to scratches. 20000mAh Power Banks- FAQs
- How long is a power bank’s charge maintained?A quality Power Bank can maintain its charge for three to six months with minimal loss. Power Banks of inferior quality may struggle to retain a charge for more than four to six weeks.
- How effective is the power bank?Approximately 6.04 percent of power is lost during conversion. Using professional equipment to test the rated output capacity would not significantly alter the outcome. The majority of power banks on the market have conversion efficiencies between 80 and 90%.
Portable Battery Review: Aukey 20,000 mAh Power Bank for iPhone
Despite the upgraded hardware and features that come with every new iPhone and iPad iteration, one thing typically stays the same: battery life. If you’re a new iPhone 8 or 8 Plus or iPhone X owner, Aukey’s 20,000 mAh power bank (42.99) will definitely keep your device going while you’re out.
This unassuming black brick measures 5.9 inches by 3.26 inches and is just 0.8-inches thick. Charging the power bank can be achieved through both micro USB and Lightning. A single button for power also serves as an indicator for the charging status of the power bank, changing from red (0%–30%), to green (30%–70%), and finally to white (70%100%).
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There are two USB ports for charging your devices; one being capable of Qualcomm QuickCharge 3.0, the other sporting AiPower technology, which adapts to your device’s unique charging needs (up to 2.4A). Between the two USB ports is an LED flashlight that can be triggered by holding the bank’s power button.
The batteries on the iPhone 8 and 8 Plus are 1,821 mAh and 2,691 mAh, respectively, while the current iPad Pro (10.5-inch screen) sports a 8,134 mAh battery. This means you can get at least seven full iPhone charges from Aukey’s power bank, or two full charges for the iPad Pro. Not bad for a fairly compact power bank.
Pros:
Aukey’s 20,000 mAh power bank is a fantastic option for the price and its small size makes it easy to take with you on the go.
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Crave Plus Pro portable charger
Crave’s Plus Pro portable charger is a three-port option equipped with Fast Charge IC 3.0. Two ports are USB-A, and the third option is a USB-C port with Power Delivery for up to 45W of charging. The power bank itself is only about the size of an average smartphone, so you should have no trouble stashing it in your backpack or even a
Once your Crave Plus Pro runs out of charge, use the USB-C input port to get back to full speed in a hurry. At just about 100, the Crave Plus Pro isn’t the cheapest option on the list, but three ports are a huge plus when charging.
Mophie Powerstation XL
At first glance, the Mophie Powerstation XL is a by-the-numbers portable battery. There are two regular USB ports and a USB-C port for input and output. The port selection isn’t varied, but at least the USB-C port can output at 15W.
Where the Powerstation XL differs from the competition is in material choice. The fabric material on the top and bottom is soft to the touch, even if you might need to clean it from time to time.
At around 60, the Powerstation XL is a bit more expensive than a few other options. However, it’s a straightforward 20,000mAh power bank that doesn’t try to be more than that. For some people, that’s enough.
Baseus 65W Power Bank
Baseus is a titan of the charging industry, and in the 65W charger, you’ve got a powerhouse on your hands. Equipped with one 65W PD USB-C port and two 30W QC USB-A ports, the power bank is a great option for juicing laptops and phones alike.
A numerical LED charge indicator gives you a more precise idea of how much more power can be squeezed from the device, and the 65W capability means that the power bank itself can be refilled in just two hours.
Omnicharge Omni 20 Plus
If you’re looking for a truly all-in-one portable battery, look no further than the Omnicharge Omni 20 Plus. In addition to the two regular USB ports, the Omni 20 Plus features a USB-C port for input and output. Thanks to Power Delivery, the USB-C port delivers up to 60W of output and 45W of input.
If you need even more power, the Omni 20 even features an AC outlet with 100W output. That means you can charge the 15-inch MacBook Pro at full speed. As if that wasn’t enough, the Omni 20 Plus delivers up to 10W of wireless charging output.
Finally, the small OLED display shows how much charge is left, how much wattage the Omni 20 Plus is outputting, and the estimated amount of time left until the battery dries up.
The Omni 20 Plus is also very heavy, even for a 20,000mAh portable battery. However, this is one of the most powerful options out there.
That’s it for our list of the best 20,000mAh power banks available. We’ll update this post with more options once they are released.