Anker 20100mAh PowerCore High Capacity Power Bank

Last updated date: July 22, 2020

DWYM Score
9.7

Anker 20100mAh PowerCore High Capacity Power Bank

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We looked at the top Power Banks and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Power Bank you should buy.

Overall Take

This power bank lives up to its name. Not only does it hold enough juice to power multiple devices, but it can adjust the current to maximize charging on different cables. Battery life is on the high end for any charger of this size. In our analysis of 35 expert reviews, the Anker Anker PowerCore High Capacity Power Bank placed 1st when we looked at the top 10 products in the category. For the full ranking, see below.

Editor's Note July 30, 2020:
Checkout The Best Power Bank for a detailed review of all the top power banks.

Expert Summarized Score
8.5
4 expert reviews
User Summarized Score
9.0
27,028 user reviews
Our Favorite Video Reviews
What experts liked
The Anker PowerCore 20100 is compact and impressive with its 20,100mAh. It can charge tablets several times, power a MacBook for an extra few hours, and still charge itself while fueling other devices. With its multiple ports and the power it has along with the price, it is extremely reasonable.
- Lumoid
The Anker PowerCore 20100 is one of the best power banks money can buy and it's affordable too. Pick this one up if you're looking for a portable charger to keep your phone and other gadgets pumped up. The edges of this are rounded so it's easy to carry.
- Tech Radar
Anker claims that the voltage boost feature senses the resistance of the cable and increase current accordingly. This feature is important when you are charging your device using long cables as such cables have high resistance that wastes current and leads to slower charging.
- Power Bank Guide
The rapid charging combined with incredible battery life makes this is a great addition to any serious traveler’s travel kit. It’s great for road trips. Anker remains a leading provider in power bank technology and the Anker PowerCore 20100 delivers. For its affordable price, it can’t be missed.
- C Boarding Group
What experts didn't like
There might be other portable chargers that are smaller and lighter. Once it’s time to charge the charger, it can take around 10 hours. Not ideal since it is a long time but Anker claimed that lower amp charging cables can make the charger take longer.
- Lumoid
Charging up this charger itself is likely to take around 10 hours though, so you'll have to wait quite a while for the power bank itself to charge up. Anker also says some lower amp charging cables will take even longer to charge it.
- Tech Radar
It takes about 12 hours to recharge this power bank using a 2 Amp wall charger. It is recharged via micro-USB (free cable is included), and almost all new Android phones these days come with USB-C chargers.
- Power Bank Guide
The cable provided as part of the package was short. Would have liked 2 cables. The size was disappointing, as nearly 6″ occasionally makes it difficult to fit. The travel pouch is nice. For those seeking this capability, the Anker PowerCore 201000 does not support Qualcomm’s Quick Charge capability.
- C Boarding Group

From The Manufacturer

Model number: A1271 Anker PowerCore 20100 High-Speed-charging, long-lasting, portable power. From ANKER, America's Leading USB Charging Brand • Faster and safer charging with our advanced technology • 50 million+ happy users and counting Ultra-High Capacity Enough power to keep you going for days. Charge an iPhone 8 almost seven times, a Galaxy S8 five times or an iPad mini twice. High-Speed Charging Technology Exclusive to Anker, PowerIQ and VoltageBoost combine to ensure your devices charge at their their fastest possible charge speed. Does not support Qualcomm Quick Charge. Enormous 4.8A Output Industry leading output of 4.8 amps provides enough power to simultaneously charge any combination of devices at full speed. MultiProtect Safety System Surge protection, short circuit protection and more advanced safety features keep you and your devices safe. Matte Finish Enhances grip and doesn't leave smudges or fingerprints. World Famous Warranty At Anker, we believe in our products. That's why we back them all with an 18-month warranty and provide friendly, easy-to-reach support. For Optimal Use: • Use the included cable, your original cable or a third-party certified one (such as MFi); AC adapter not included. • Please use your original Apple charging cable (not included) to charge Apple products. • Compatible with most USB-charged devices, including iPhone 8 / X / XS / XS Max / XR (Lightning cable required), Android smartphones and tablets (including the Nexus 7), USB-C MacBooks / iPad (USB A to C cable required). • Not compatible with the iPod nano, iPod Classic; Not for devices with an input below 50mA (e.g. some Bluetooth headsets and GPS devices). What's In the Box PowerCore 20100 Portable Charger Micro USB cable Travel Pouch Welcome Guide

Overall Product Rankings

Anker 20100mAh PowerCore High Capacity Power Bank
1. Anker 20100mAh PowerCore High Capacity Power Bank
Overall Score: 9.7
Expert Reviews: 4
INIU 10000mAh Ultra Slim Power Bank Portable Charger
2. INIU 10000mAh Ultra Slim Power Bank Portable Charger
Overall Score: 9.5
Expert Reviews: 4
ZMI 10000mAh PowerPack Power Bank Portable Charger
3. ZMI 10000mAh PowerPack Power Bank Portable Charger
Overall Score: 9.4
Expert Reviews: 4
RLERON 25000mAh High Capacity Wireless LCD Power Bank
5. RLERON 25000mAh High Capacity Wireless LCD Power Bank
Overall Score: 9.3
Expert Reviews: 2
ROMOSS 30000mAh Power Bank Sense 8+ Power Bank
6. ROMOSS 30000mAh Power Bank Sense 8+ Power Bank
Overall Score: 9.2
Expert Reviews: 4
AUKEY 10000mAh Slimline Power Bank Portable Charger
7. AUKEY 10000mAh Slimline Power Bank Portable Charger
Overall Score: 9.2
Expert Reviews: 4
CXLiy 26800mAh High Cpacity Power Bank Portable Charger
8. CXLiy 26800mAh High Cpacity Power Bank Portable Charger
Overall Score: 9.1
Expert Reviews: 2
RAVPower 26800mAh RAVPower Power Bank
10. RAVPower 26800mAh RAVPower Power Bank
Overall Score: 9.1
Expert Reviews: 4

An Overview On Power Banks

Tablets. Smartphones. Smart watches. Laptops. We’ve got so much gear these days that sometimes we can forget that these devices need power — until that power gauge goes into the red. When that happens, you understand how essential a good power bank can be, especially if you’re on vacation or miles away from a convenient wall plug in the wild.

In situations like those, a good power bank can literally be a lifesaver. But exactly what are they? First, let’s talk about what they are not. While power banks can charge your phone or other devices, they are not technically chargers. Chargers are just conduits between your phone and a power source (typically a wall outlet). Power banks are the power source, packing an internal battery that your gadgets can hook up to and feed on.

Those internal batteries can be one of two types: Lithium-ion (usually listed as Li-Ion) or the less common lithium polymer (Li-Po).

Lithium-ion batteries were first developed in the early 1910s, and obviously they are still in common usage today — with several improvements to those first crude models. These batteries can pack a lot of power into a relatively small package, and they’re relatively cheap to produce. They’re not without their drawbacks, however. Lithium-ion batteries will degrade more easily over time, and can even be unstable — although that’s more likely to be the fault of the device and not the battery inside it. (For a prime example, look up the 2016 woes of Samsung’s Galaxy Note 7).

Lithium polymer batteries, by comparison, are less likely to leak electrolytes and therefore a bit safer. They’re also lighter, more flexible and can be made much thinner. So why aren’t they the standard? Like most technology that’s smaller and sleeker, they are significantly more costly to make. Nor are they necessarily better, depending on your energy needs. In general, they can’t pack the same amount of power into as small of a space as lithium-ion, and their ability to recharge can degrade slightly over time.

Mind you, looking at the type of battery you have won’t tell you how much energy your power bank can supply. For that, you’ll have to look at the battery capacity, which is measured in mAh. That stands for milliamp hours, and it takes a bit of explaining. Milliamps are a unit of measurement for electric current equal to one-thousandth of an ampere. Milliamp hours will tell you the energy capacity of a battery by telling you how long your power bank can supply a certain amount of energy. In terms of charging up your phone, let’s say it has a battery capacity of 2,000 mAh. If you have a power bank with a battery capacity of 10,000 mAh, it could charge up your phone five times without needing a recharge itself. Simple division: 2,000 times 5.

Enjoy the practice, because you may want to do a little more easy math before shopping. Take a look at all your devices and add up their own battery capacity. That’s the number you’ll probably want as a minimum for your own power bank, provided you plan on charging multiple gadgets with it. The battery capacity for smartphones can vary wildly (especially among older models), but the current iPhone 11 has a capacity of over 3,000 mAh. The latest tablets have batteries that can hold from 5,000 to 9,000 mAh or more. Laptops understandably take a lot more power, so you’ll need a high-end power bank with at least 20,000 mAh if you want more than one full charge at a go.

That’s well and good, but capacity isn’t everything. When you’re on the go, sometimes you don’t have all night to charge up your gear. When you need to know how fast your power bank will deliver a charge, look at the output stats. They’ll be measured in two numbers: Volts (V) and amps (A). Without getting into the electrical weeds too much, these two numbers are multiplied together to get the full output possible, in watts (W). You’ll see proprietary fast-charging tech like Qualcomm’s Quick Charge advertised for certain devices, but those numbers are the bottom line. And bear in mind they may not be the rate at which your device actually charges: Speed is limited by the cable that you use to connect your phone or tablet to the power bank. If the power bank can deliver a charge at 5V / 3A but the cable is only capable of handling 5V / 1A, you’ll charge at the slower rate.

Of course, your power bank itself will eventually have to be recharged. Look for the input stats to get a sense of how fast it can get to a full charge when connected to a standard wall outlet.

So much for the interior stats. One feature that will be immediately obvious in your power bank is how many output ports it has. The more ports, the more devices you can charge simultaneously. Multiple ports might be a major attraction for multi-taskers who like to take all their gear on the go, but all ports are not created equal. USB-A ports will be standard, but there have been several upgrades to that standard over the years. Look for ones with USB 3.0 compatibility or higher, as they’ll be able to take advantage of higher speed cables.

Some power banks might be capable of wireless charging, and may even be able to do that while providing power to other devices through the USB ports. Just know that the power it puts out will be split between those devices and may not charge any of them as fast as it would solo.

Of course, all this functionality doesn’t mean much if your power bank weighs as much as a generator. Yes, modern power banks keep a relatively slim profile. Some may be as small as your smartphone itself, or even smaller. Heads up, though: they may be heavier than they look — even ones that have the slimmer lithium polymer batteries. Take a look at the weight before purchasing and figure that into your travel plans.

Speaking of travel benefits, many power banks can make themselves useful for more than just a passive charge. Some can use their batteries to power a flashlight in case of emergencies or will heat up just enough to become a makeshift pocket warmer in frigid weather. Those perks can make a lot of difference, and turn a forgotten backup device into a handy hiking buddy.

DWYM Fun Fact

While you’re watching that little bar fill up on your phone, say a quiet word of thanks to Alessandro Volta. He’s the French physicist and chemist who gave the world its first electric battery in 1800. Back then, it was known as a voltaic pile, composed of copper and zinc dipped in brine. His discovery was built on the experiments of colleague Luigi Galvani, who initially used frog’s legs to conduct current between two electrodes. As you might imagine, the term “volt” was coined in homage to Volta.

The Power Bank Buying Guide

  • So you’ve got your power bank. All set to take your gear on the road? Not so fast. Make sure you’ve got the charging cables to go with it. Strange as it may seem, many power banks won’t provide the connectors that actually attach their battery to the device it needs to charge. Check that you’ve got a cable to match the port type supplied on your power bank (ideally one that matches or exceeds the output speed).
  • Make sure you also charge up the power bank before you use it for the first time. Many banks will come with only a minimal charge right out of the box, in order to preserve the battery.
  • A good power bank can last for many years if it’s properly stored. Different models may boast of their durability, but no matter what the casing, lithium batteries and moisture do not mix. Keep it out of the rain for extended periods, or submersion in water. A more common pitfall is heat or cold. Your power bank will perform best at room temperature, and it definitely will suffer if left out in a hot car for days on end (or a poorly insulated one in winter, for that matter).