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Best Portable Charger of 2021

We bought and tested portable chargers from Anker, INIU, Clutch, Q SLim, and more to help you find the best
This charger has a single USB output port and a microUSB or USB-C port...
Credit: Jason Peters
By Austin Palmer and David Wise  ⋅  Sep 20, 2021
Our Editors independently research, test, and rate the best products. We only make money if you purchase a product through our links, and we never accept free products from manufacturers. Learn more
We've researched over 100 of the best portable chargers you can buy, then bought the 11 top models currently available in 2021 to figure out which is the best of the best. We rigorously tested these products head-to-head, even going so far as to use a digital multimeter and a simulated resistive mode to actually measure their capacity. We also evaluated and ranked how portable these products truly are and their overall convenience and ease of use. Check out the full review to find out which battery bested them all, which charger is the most compact, and which is the best for high-power devices.

Top 11 Product Ratings

Displaying 1 - 5 of 11
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Awards Editors' Choice Award Editors' Choice Award Top Pick Award Top Pick Award  
Price $25 List
$29.99 at Amazon
$20.00 List
$16.98 at Amazon
$40 List$40 List
$39.99 at Amazon
$26 List
$24.99 at Amazon
Overall Score Sort Icon
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Pros Inexpensive, super easy to carry in a pocket, short recharge timeLightweight and portable design, good battery capacity, inexpensiveMiniscule, quick to recharge, integrated lightning cableExtremely convenient, decent capacityFairly compact given its capacity, available in multiple colors
Cons No integrated cables, can only charge a single device at a timeNo integrated cablesLimited functionality, minimal capacityNot the most portable we have seen so far, takes forever to rechargeNo integrated cables, only a single USB port
Bottom Line If you want a bare-bones portable charging solution without breaking the bank, this is the battery for youIf you are looking for a battery bank with a larger capacity, then this is one of our favoritesThe Clutch is an amazing option for iPhone users that want a compact charging solutionIf you want a charger with integrated cables for all sorts of different devices, then this is the power bank for youThe PowerCore 10000 is a bare-bones charger that gets the job done but lacks any extra features to make it more convenient to use
Rating Categories Anker PowerCore 5000 INIU Portable Charg... Clutch Charger Q Slim Power Bank P... Anker PowerCore 10000
Portability (40%)
9.0
8.0
10.0
6.0
8.0
Charging Efficiency (30%)
6.0
6.0
5.0
6.0
5.0
Added Convenience (20%)
3.0
6.0
2.0
8.0
3.0
Recharge Time (10%)
10.0
6.0
8.0
3.0
7.0
Specs Anker PowerCore 5000 INIU Portable Charg... Clutch Charger Q Slim Power Bank P... Anker PowerCore 10000
Claimed Capacity 5,000 mAh 10,000 mAh 2,300 mAh 10,000 mAh 10,000 mAh
Dimensions 4.20" x 1.30" 5.19" x 2.75" x 0.60" 3.56" x 2.50" x 0.16" 6.30" x 3.00" x 0.63" 3.56" x 2.38" x 0.84"
Measured Weight 4.71 oz 6.88 oz 2.00 oz 9.05 oz 6.46 oz
Measured Charge Time 150 min. 300 min. 208 min. 588 min. 240 min.
Output 1 5V / 2A DC5V / 3A(Max) Built in lightning 5V / 1A Built in USB-C 5V / 2.1A 5V / 2.4A
Output 2 N/A DC5V / 3A(Max) N/A Built in micro
5V / 2.1A
N/A
Output 3 N/A DC5V / 3A(Max) N/A Built in lightning
5V / 2.1A
NA
Output 4 N/A N/A N/A USB-A 5V / 2.1A N/A
Input 5V / 2A USB-C:
5V / 3A
Micro: DC 5V / 0.8A AC 110-240V
.15A
50/60Hz
Micro 5V / 2A
5V / 2A
Model A1109 BI-B1 N/A - lightning cable version PB147AC A1263


Best Overall Portable Charger


Anker PowerCore 5000


70
OVERALL
SCORE
  • Portability 9
  • Charging Efficiency 6
  • Added Convenience 3
  • Recharge Time 10
Capacity: 5,000 mAh | Maximum Discharge Rate: 2 A
Great bargain
Can charge two devices at once
Good capacity
Limited bonus features

If you are searching for a top-tier portable charger, then we think the PowerCore 5000 by Anker is one of the best options for most people. It's not even terribly expensive. This charger has enough capacity to fully charge most smartphones — and then some — all while being very compact and super portable. We like the dual output ports as well.

However, this charger is a bit bare-bones in nature. It doesn't double as a flashlight and lacks any integrated features, like device charging cables or a wall recharging plug. The maximum current is also a bit less than some of the newer power bricks, so you might notice that your larger devices are charging just a bit slower than you are used to. Despite that, we think this is very much a premium product and highly recommend it.

Read review: Anker PowerCore 5000

Best Larger Capacity Charger


INIU Portable Charger 10000


68
OVERALL
SCORE
  • Portability 8
  • Charging Efficiency 6
  • Added Convenience 6
  • Recharge Time 6
Capacity: 10,000 mAh | Maximum Discharge Rate: 3 A
Very portable
Can charge three devices at once
USB-C input/output
No built-in cables or plugs

If you are shopping for a portable charger that has enough juice to handle multiple full charges for your smartphone, then we think the INIU Portable Charger 10000 is the best product for you. This larger battery has three output ports, allowing you to recharge multiple devices at once. It has good capacity and is highly portable, able to be easily carried in a front or back pocket without too much of an issue. This charger even has an integrated flashlight.

This charger doesn't have any integrated cables or a plug for recharging, so you do need to remember to keep those on hand. However, we think this charger is one of the better options if you are looking for a battery bank with a bit more capacity.

Read review: INIU Portable Charger 10000

Best Bang for the Buck


2-Pack Miady 10000


60
OVERALL
SCORE
  • Portability 7
  • Charging Efficiency 6
  • Added Convenience 5
  • Recharge Time 4
Capacity: 10,000 mAh | Maximum Discharge Rate: 2.4 A
Great bargain
Can charge two devices at once
Good capacity
Slow to recharge
No built-in cables or plugs

If you are shopping on a limited budget and hoping to get the most battery for your buck, then we think the 2-Pack Miady 10000 is a fantastic option. This bargain 2-pack of 10,000 mAh batteries usually costs as much as a single one of its competitors and offers solid performance. Each battery can charge up to two things at once, and you have the option of using a micro-USB or a USB-C cable to recharge the Miady once it's depleted. It has a decent output rate for fast charging most devices and is small and slim enough to be convenient to carry.

However, these batteries are fairly minimalistic. They don't have any built-in cables for charging different devices, and you will need to provide your own USB power adapter to recharge them, as they don't have an integrated wall plug. Speaking of recharging, we also found that these batteries can take a long time to recharge — just shy of 7 hours. Despite that, we think it's hard to argue with how good of a value the Miady can be and recommend it to anyone hoping to maximize their budget.

Read review: 2-Pack Miady 10000

Best for iPhones


Clutch Charger


67
OVERALL
SCORE
  • Portability 10
  • Charging Efficiency 5
  • Added Convenience 2
  • Recharge Time 8
Capacity: 2,300 mAh | Maximum Discharge Rate: 1A
Exceptionally portable
Convenient built-in cable
Incompatible with Android/Samsung
Limited capacity

If you use an iPhone and want the smallest, most compact charger you can get, then the Clutch Charger is a perfect choice. This petite portable is roughly the size of a few credit cards stacked together, and you can easily carry it in a wallet or pocket without it being cumbersome. Even better, it has a built-in Lightning cable, so you don't need to worry about forgetting to bring one.

Unfortunately, this charger isn't as versatile as other products we have seen. It can't recharge multiple devices at once and is only compatible with iPhones. The Clutch Charger also doesn't have all that much capacity — generally limited to a single charge or less. It's a great product if you want to make sure you always have enough juice in your iPhone to make a call or summon an Uber, but you'll probably be disappointed if you expect more than that.

Read review: Clutch Charger

Best All-in-One Charger


Q Slim Power Bank Pro 10000 mAh


61
OVERALL
SCORE
  • Portability 6
  • Charging Efficiency 6
  • Added Convenience 8
  • Recharge Time 3
Capacity: 10,000 mAh | Maximum Discharge Rate: 2.1A Shared
Three integrated device cables
Built-in wall plug
Takes forever to recharge
Can't fast charge multiple devices at once

If you've ever experienced the frustration of having a portable charger but not having the right cable for a device, then you should consider the Q Slim Power Bank Pro 10000 mAh. This portable charger has three different integrated charging cables that give you the flexibility to charge all the most common consumer electronics devices. This power bank also features a foldable wall plug, negating the need for a separate USB wall adapter for recharging the Power Bank Pro 10000 mAh when it's dead. On top of all that, it did reasonably well in our capacity tests, and we found it to be easily portable, taking up roughly the same amount of space as a typical smartphone.

We were a little disappointed, however, in the Q Slim Power Bank Pro 10000 mAh when it came to recharging its own battery pack. Although it is very convenient to recharge with the built-in plug, it takes significantly longer than many other batteries — approaching almost 10 full hours in our test! Additionally, while this power pack does have three integrated cables, it only has a maximum shared power output of 2.1 amps between them, so you can't fast charge multiple devices at the same time. We think the convenience factor of the Power Bank Pro 10000 mAh far outweighs these flaws and highly recommend this battery to anyone who hates getting caught without the right cord or wants to cut down on their clutter of chargers and cables.

Read review: Q Slim Power Bank Pro 10000 mAh

Best for High-Power Devices


Anker PowerCore+ 26800 PD


45
OVERALL
SCORE
  • Portability 2
  • Charging Efficiency 6
  • Added Convenience 6
  • Recharge Time 7
Capacity: 26,800 mAh | Maximum Discharge Rate: 3.4 A shared among two USB-B, 3 A for USB-C PD port
Great for high power devices
Recharges exceptionally fast
Bulky
On the more expensive side

If none of the previous portable batteries can fulfill your devices' power needs, then you should check out the Anker PowerCore+ 26800 PD. This beast of a battery can supply enough current to capably charge some of the most power-hungry devices, such as newer MacBooks, laptops, or gaming systems — like a Nintendo Switch. It uses the more modern Power Delivery standard with USB-C connectors, letting you charge compatible devices at their absolute fastest rate. It has plenty of juice to fully charge most newer smartphones five times or more, and it recharges itself quite fast with the included fast charging wall adapter — a rarity for larger battery packs.

Unfortunately, the Anker PowerCore+ 26800 PD is also one of the largest and heaviest portable batteries we have tested and is quite cumbersome to carry around in a pocket which cuts down on its convenience quite a bit. It still isn't that bad to transport; we just vastly prefer to carry it around in a bag, backpack, or purse. As you might guess, his battery is also a bit more expensive than some of the smaller models. Regardless, we readily recommend this battery module to anyone that needs to charge their phone a handful of times or needs a battery that can handle the higher power draws of larger devices.

Read review: Anker PowerCore+ 26800 PD

Compare Products

select up to 5 products to compare
Score Product Price Our Take
70
$25
Editors' Choice Award
This charger doesn't have a ton of extra features but has everything it needs and is one of our favorites
68
$20
Editors' Choice Award
This is one of our favorite options if you are looking for a charger with a little more capacity
67
$40
Top Pick Award
Small enough to fit in most wallets, the Clutch is a fantastic option if you need a tiny charging solution for your iPhone
61
$40
Top Pick Award
This portable power pack sets itself apart by having integrated micro-USB, USB-C, and Lightning charging cables
60
$26
If you want a basic charger with enough capacity for a few charges, then the PowerCore 10000 is a solid option
60
$22
This bare-bones charger is inexpensive and highly portable but doesn't have a ton of extra features
60
$20
Best Buy Award
We think this is multi-pack is a great option to anyone shopping on a budget and trying to get the most bang for the buck
46
$13
If you are shopping for a portable battery on a tight budget, then the Aibocn is our top recommendation
45
$130
Top Pick Award
If you are looking for a battery with tons of capacity that can charge larger devices, this is it
43
$60
Costing a bit more than average all while scoring well below average, this battery pack failed to win much praise from us
39
$28
Falling a little short in our capacity tests precluded this charger from claiming an award

Some of the different portable chargers currently available.
Some of the different portable chargers currently available.
Credit: Jenna Ammerman

Why You Should Trust Us?


Both Austin Palmer and David Wise have extensively tested and compared hundreds and hundreds of different consumer tech products over the past few years and are more than familiar with all of the different ways to charge devices over USB. In addition to their extensive experience testing and reviewing over 400 different home and tech products for TechGearLab, David also has formal training as a mechanical engineer, with a particular focus on electronics and electromechanical systems. He specialized in designing and building electric vehicles and the electronics systems for underwater robots, which came into play when determining our portable charger testing procedure. We also consulted with a handful of other mechanical and electrical engineers while designing our testing plan.

We charged everything from a Nintendo Switch to smartphones to laptops with these products, comparing their performance side-by-side in several real-world scenarios. We also used a dummy resistive load and a digital USB multimeter that we could set for different discharge rates to objectively compare the capacity of each battery under controlled conditions, and timed how long it took for each one to recharge. Along with this set of electrical tests, we measured the weight of each battery and compared how easy they are to carry in a pocket, as well as awarded extra points for any additional special features and functions.

We extensively tested all the best portable USB chargers side-by-side.
We extensively tested all the best portable USB chargers side-by-side.
Credit: Jenna Ammerman

Related: How We Tested Portable Chargers

Analysis and Test Results


In our quest to find the best portable charger, we conducted extensive research and picked out the most promising portable power packs on the market. We then purchased them to undergo head-to-head tests here in our lab. We divided our testing procedure into four weighted performance metrics: Portability, Added Convenience, Capacity, and Recharge Time.

Related: Buying Advice for Portable Chargers


Value


If you are shopping on a tight budget, then we think the Miady 2-Pack easily gives you the most bang for the buck. You get the cost savings of multiple batteries, with the price of this pack being far less than some of the single batteries. You may also want to consider the Q Slim Power Bank Pro 10000 mAh if you are shopping on a budget. This battery pack isn't too expensive, but it has all three major types of charging cables built-in and an integrated wall plug, so it can save you quite a bit since you don't need to buy multiple additional cables and a USB wall adapter.

A portable charger is a great way to ensure you never get caught...
A portable charger is a great way to ensure you never get caught with a dead phone.
Credit: Jenna Ammerman

Portability


Although none of these batteries are too large to be carried around, we did notice a difference between several of them. Some can easily fit in a pocket, while others are more suitable to carry around in a purse, backpack, or laptop case. To determine the score, we looked at each charger's dimensions, weight, and how easily it could fit in a pocket.


It's easy to see why the Clutch Charger is our top recommendation when it comes to portability. It weighs only 2 ounces, and its credit card-like shape allows you to carry it in a wallet — a unique trait for these products. It is also virtually unnoticeable in a pocket, so easily forgotten that we worry some people might put it through the washing machine by mistake.

The Clutch charger is an amazingly compact charging solution for...
The Clutch charger is an amazingly compact charging solution for iPhones.
Credit: Laura Casner

The Anker PowerCore 5000 is the next most portable battery in our lineup. It is both one of the most compact and lightweight that we tested. It weighs in at 4.71 ounces with a cylindrical shape that is roughly 1.3 inches in diameter and 4.3 inches long. However, it is the incredible ease of carrying this in a pocket that boosted this to the top. We particularly like that it is easy to access the output port and plug a cable in while it is in your pocket, allowing you to carry the battery in one pocket and charge your phone in the other, running the cord around your waist.

The PowerCore 5000 is one of the easiest to fit in a pocket.
The PowerCore 5000 is one of the easiest to fit in a pocket.
Credit: Jenna Ammerman

Following that, we think the INIU Portable Charger 10000 is easily the next most portable. This charger is very lightweight and has a slim profile, making it easy to carry around in a pocket without becoming uncomfortable. The Anker PowerCore 10000, the Anker PowerCore Slim 10000, and the 2-Pack Miady are some of the next most portable options. For this metric, we looked at a single one of the Miady 2-Pack chargers.

The Miady battery isn&#039;t the most compact we have seen but it&#039;s still...
The Miady battery isn't the most compact we have seen but it's still very portable.
Credit: David Wise

None of these chargers are too heavy, all weighing in between 5.5 and 7.5 ounces. They are all easy enough to carry around in your pocket, with the Miady 10000 having a slight edge over the others by being just a bit slimmer.


The Q Slim Power Bank Pro 10000 mAh followed next in terms of portability. It feels more compact due to its slimmer and more smartphone-like aspect ratio. Though heavier than some models, it fits in a pocket so much better. It feels just like a phone when sitting, and it is easy to forget that you are even carrying it while walking around.

The Q Slim Power Bank Pro is just a little bit larger than your...
The Q Slim Power Bank Pro is just a little bit larger than your typical smartphone.
Credit: Jenna Ammerman

We found the INIU B1-B5 quite uncomfortable to carry around in a pocket, both while sitting or standing. It's bulky, feeling like three smartphones stacked on top of each other.

Charging Efficiency


We evaluated each model based on its power output at its maximum discharge rate relative to its rated capacity. We also verified how well various manufacturers' claims stood up to actual testing, such as being able to charge a specific phone a certain number of times. We used a dummy resistive load set to draw power at the maximum rate from each battery pack and a digital multimeter to measure precisely how much electricity was put out by each pack. No battery pack even came close to its listed capacity.


The Anker PowerCore 5000, the Anker PowerCore Slim 10000, the Anker PowerCore+ 26800 PD, the Q Slim Power Bank Pro 10000 mAh, the INIU 10000, and the Miady 2-Pack 10000 all showed respectable results in our capacity and efficiency tests.

Some of the electrical meters and dummy loads we used to test these...
Some of the electrical meters and dummy loads we used to test these products.
Credit: Austin Palmer

Of these batteries, the Miady 2-Pack did the best in our device charging efficiency tests, significantly exceeding its manufacturer's claims. It managed to charge our test phone three full times, exceeding the claim of 2.2 charges for a comparable phone. This was almost matched by the Anker PowerCore Slim 10000, which exceeded its claimed number of charges by around 18%.

The Miady did alright in our capacity test with a resistive load.
The Miady did alright in our capacity test with a resistive load.
Credit: David Wise

The Anker PowerCore 5000 and the Anker PowerCore+ 26800 PD slightly exceeded their marketing claims, charging a Samsung S8 1.12 and 6.11 times, respectively. These figures equate to about 10% more charges than their claimed max. The INIU 10000 was right on the mark, charging our test phone exactly the number of times as claimed, or within less than a percent off.

The INIU charger did quite well in our charging efficiency tests.
The INIU charger did quite well in our charging efficiency tests.
Credit: Jason Peters

The Q Slim Power Bank Pro 10000 mAh fell just a tiny bit short of its advertised claims in our tests. Its manufacturer says that you should get between 2.4 and 4 complete charges, depending on the phone, but we didn't find that to be the case in our assessment. Using the same Samsung Galaxy S8, we were able to fully charge it 2.27 times. You may be able to get more with a smartphone with a smaller battery, but we wouldn't expect much more than two full charges from this battery with most newer phones.

For our discharge test, the Anker PowerCore 5000 discharged 65% of its listed capacity, and the Anker PowerCore+ 26800 PD at 62% — both outperformed by the Anker PowerCore Essential 20000, which output 67% of its claimed capacity in our test. We ran these at 2.4A until they died, though the Anker PowerCore 5000 did need to have its discharge rate dropped a bit right at the end to keep from resetting.

The INIU B1-B5 also scored quite poorly in our capacity tests, putting it close to the back of the group. While this battery is rated with a 20,000 mAh capacity, we were only able to achieve around 28% of that when using our load resistor set for a current draw of 2.4 amps. However, it did do much better with lower outputs, charging our test phone multiple times and outperforming some of the similarly rated packs.

Added Convenience


Next, we moved on to evaluating and judging how convenient each portable power pack is to use, identifying if there are any special functions or extra features. We considered if you could charge multiple devices at the same time, if there is a built-in flashlight or built-in cables, and if there is an integrated method to recharge the battery.


The Q Slim Power Bank Pro 10000 mAh delivered an unparalleled performance in this group of evaluations with its remarkable convenience. This portable battery can charge multiple devices simultaneously but is restricted by a maximum 2.1 amp shared output, so your phone and tablet both might not charge quickly if you plug them both in at the same time. This battery has the typical 4-LED battery indicator but lacks an integrated light source. However, the supreme convenience of all the built-in cables and plug sets the Power Bank Pro 10000 mAh well above the rest of the group in terms of convenience. You can charge a myriad of devices with the built-in USB-C, micro-USB, and Apple Lightning connector. After your charging is complete, you simply fold out the 120-volt plug and plug it directly into the wall to recharge.

The Q SLim has all three major types of charging cables built-in:...
The Q SLim has all three major types of charging cables built-in: micro-USB, USB-C, and Lightning.
Credit: Jenna Ammerman

The Anker PowerCore+ 26800 PD lacks any integrated features, but it can charge multiple devices simultaneously and has the standard battery level indicator. It earns some extra points for having USB Power Delivery capabilities, which means that it can function as an all-in-one charging solution for devices as more new products adopt this standard. It can charge large devices that other batteries can't, like a Nintendo Switch or a new MacBook computer.

The PowerCore+ 26800 PD will charge a Nintendo Switch while you are...
The PowerCore+ 26800 PD will charge a Nintendo Switch while you are playing.
Credit: Jenna Ammerman

The INIU B1-B5 and the INIU 10000 also scored similarly to the PowerCore+ 26800 PD, finishing just behind the top pack. These both have an integrated flashlight and can recharge multiple devices simultaneously. The INIU B1-B5 even has an additional USB-powered flashlight for more luminescence. However, neither have an integrated charging cable nor wall plugs.

The INIU BI-B5 includes an additional LED light.
The INIU BI-B5 includes an additional LED light.
Credit: Laura Casner

The Anker PowerCore Essential and the Miady don't have too much in the way of extra features, but we do like that they can charge multiple devices at once.

We like that you can charge two devices simultaneously with this...
We like that you can charge two devices simultaneously with this battery bank.
Credit: David Wise

The Clutch Charger is pretty bare-bones, but it does have a built-in charging cable for an iPhone. You can't charge multiple devices or other non-Apple devices, though.

The Clutch Charger isn&#039;t the most versatile option we have tested...
The Clutch Charger isn't the most versatile option we have tested, essentially limited to charging iPhones.
Credit: Laura Casner

Recharge Time


For the final 10% of the score for each portable charger, we looked at how long it took to recharge each of these batteries. This testing process was quite simple — we timed how long it took for a completely dead portable charger to fully recharge, using their LED indicator lights as a gauge. To power each power pack, we used either the included micro USB cable with a Samsung Quick Charge wall adapter or the integrated charging plug if the charger had one.


The Anker PowerCore 5000 earned top marks for this metric for the 150 minutes it took to completely recharge. It was followed by the Clutch Charger with the 208 minutes it took to recharge. The Anker PowerCore 10000, the Aibocn Power Bank 10000, and the Anker PowerCore+ 26800 PD followed. These all took 240-250 minutes to recharge, but we did use the included fast charger with the Anker PowerCore+ 26800 PD, rather than the standard charger used with the other products. It would take significantly longer with a typical charger.


The Miady 2-Pack, Anker PowerCore Slim 10000, the INIU 10000, and the INIU B1-B5 required approximately 5-7 hours to recharge fully. The Q Slim Power Bank Pro 10000 mAh has a disproportionately long recharge time, considering its 10,000 milliamp-hour listed capacity. We used the integrated wall plug on this power pack for this evaluation, and it took just under 10 hours — 588 minutes — to completely refill this battery.

The integrated wall plug is handy but slow to recharge the Q Slim.
The integrated wall plug is handy but slow to recharge the Q Slim.
Credit: Jenna Ammerman

The Anker PowerCore Essential takes a very long time to recharge compared to the smaller batteries — generally at least 10 hours.

Conclusion


Hopefully, this review has given you a better understanding of what to look for in a portable charger and has helped you narrow down your options to pick the perfect model for your needs and budget. Whether you are looking for the lightest possible portable battery, the one with the most capacity of them all, or something in between, our lineup has the ideal option for you.

Austin Palmer and David Wise