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Smallest Most Powerful Power Banks | Top 5 Reviewed 2021

power banks

Nowadays, people are very fond of gadgets and can often not be without them for very long. You can see people holding and using their smartphones everywhere you go. 

It’s becoming a necessity and we can’t put the blame on them since the internet and smartphones have been useful in many ways. With your smartphones on hand, you can easily get in touch with your family and friends wherever and whenever you are. 

You can get access to important information when you need it. And even when you are not at home, smartphones work through its standalone batteries and mobile data.

Now, the most challenging part of owning a smartphone is keeping it alive. Your phone can’t last a day without charging it. And since you are traveling for hours outside, you need something to keep your gadgets alive while you are away from home. 

This is where power banks come in. In this review article Top 5 Smallest Most Powerful Power Banks, we will give you everything you need to know about power banks and some recommendations so you can find the best products on the internet.


What are power banks?

Power banks are accessories to your gadgets. It portable power storage that can charge your smartphones. The best power banks in the market today are those that can be carried around easily with enough power the support smartphone batteries multiple times a day. 

This is a replacement to power plugs when you are traveling outside or when spending your time outdoor. Essentially they are very small but very powerful rechargeable batteries.

charging a smart phone

Editors Choice
Anker 20,100mAh Portable Charger, Ultra High...
Make & Model
Anker PowerCore 20100mAh
6.64 x 2.28 x 0.87 in
12.5 ounces
Number Outlets
Power rating
Time to fully charge
Number time can charge a phone
iPhone 8 charges - Android 5 times
Editors Choice
Anker 20,100mAh Portable Charger, Ultra High...
Make & Model
Anker PowerCore 20100mAh
6.64 x 2.28 x 0.87 in
12.5 ounces
Number Outlets
Power rating
Time to fully charge
Number time can charge a phone
iPhone 8 charges - Android 5 times

Last update on 2024-04-16 / Affiliate links / Images from Amazon Product Advertising API

Why should you buy and use a power bank?

Power plugs can’t be carried around with you, hence you need a power bank. Although some places like cafes have power plugs where you can charge your gadgets, they are not always available due to the number of customers wanting to keep their electronics alive while they are spending their time away from home. 

One major reason why you need to buy and use a power bank is that you need to save yourself from competing with those people who want to use the electronic sockets in cafes.

Owning a power bank put your mind at ease that you’ll never run out of power for you phone. Missing business or personal calls, not to mention watching your favorite film whilst travelling to work is not longer a worry.

Power banks are your power support and if you choose not to purchase one then you’re limiting what and when you can use your phone, Tablet and Laptop. Expect that you can only use your smartphone limitedly which means you’ll need to preserve its power or miss out.

When out and on the go where main power is not available you could take with you a solar charging panel. These panels are small and compact solar panels that can recharge your portable power bank. Using the power of the sun ( Weather permitting ) you can get an endless power supply for your power bank then pack it away and you have a power bank fully charged ready to charge any device when the sun goes down.

To read our review of the TOP 5 Solar Charging Panels Click Here!

Top 5 Power Banks in Amazon You Should Consider

Now that you have an idea of what power banks are and what are they for, it’s time we introduce you to the Top 5 Smallest Most Powerful Power banks that you can purchase quickly and easily from Amazon. 

Whether you are looking for the smallest power bank or for the most powerful powerbank, you will surely find what you are looking for on this list.

Anker PowerCore+ Mini, 3350mAh Lipstick-Sized Portable Charger

This product is the top choice for those who are looking for ultra-lightweight power banks. Its size is less than 80 grams and it is compatible with Android smartphones and iPhones. 

What makes it ideal for smartphone users is that it can fully charge small-screen iPhones from 0 to 100%. Other devices can be charged until 50% with 1-amp speed. This power bank can be charged within 3.5 hours. 

However, this is not enough power storage for those who are planning to stay outside all day. If you can’t charge this power bank after using it multiple times for multiple gadgets, its power won’t last very long.

Tech Info

  • 3350 mAh
  • iPHONE 80% Charge, Android 79%
  • Weight: 80g
  • AMP INPUT: 1 Amp
  • 5V =1Amp
  • USB Ports: 1
  • Micro Usb Cable


  • Ultra-Lightweight
  • LED Indicator
  • Surge Protector
  • USB Outlet


  • You can only get one full charge per use

Reviewers Rating
Overall Rating

See the latest prices on Amazon

RAVPower Palm-Sized Portable Charger

This is another compact power bank that can fit even in your pocket. It weighs 136 grams and it has a 2,4 amp speed for charging.

This power bank can charge your iPhones twice as fast as Apple charges, which is ideal for people who don’t want to get their gadgets attached to portable power storage for a long time. 

Your phone can be charged for 40 minutes with a 50% maximum battery life. What’s great about this product is that it is small and its price comes with a good quality product.

Inside this portable power bank are two 3350 battery sells made by LG one of the leading manufacturers of rechargeable batteries. They are very safe and have less change of decay and failure. They also have a longer lifespan than many other batteries. 

This small power bank can fully recharge many iPhones within 2 hours giving you more time to work and play.

Tech Info

  • Capacity: 6700mAh 
  • Input: DC 5V / 2A 
  • Output: DC 5V / 2.4A 
  • Size: 3.54*0.98*1.57 inches 
  • Weight: 4.1oz
  • Recharge time 3
  • Number of USB charging points 3


  • Number of USB Sockets
  • Lightweight and Compact
  • 4 LED Indicators
  • Fire Resistant case


  • LED can fail
  • Not as powerful as some other brands

See the latest prices on Amazon

Anker PowerCore 20100mAh – Ultra High Capacity Power Bank

If it’s okay for you to carry power banks that are not lightweight but can give you enough power for the day, this 20100 power bank is fit for your needs. This is one of the most powerful yet small power banks we have ever tested. 

However, it has a weight of 354g which it not lightweight but it has 2 ports to support your charging needs. It is compatible with iPhones and Android smartphones. 

It can also be used for laptops like Macbook and Android tablet. You should be reminded that this product is a huge battery. If you want a lightweight one, this is not for you. 

But, its speedy charging will save your gadgets from turning off especially during emergency situations.

It comes in a range of colors and looks very simple but stylish and hidden inside it a very powerful technology. I loved the construction which had a premium feel to it. 

  • 92 hours of battery Life
  • 10 hour full recharge time
  • Weight 12.56 oz
  • Charges an iPhone 7 times and Samsung 5
  • Warranty: 18 Months


  • Came with a users guide
  • Simple, clean design
  • 18 Month Warranty
  • Perfect for small electronics, Laptops, Computer and Lights
  • Voltage Boost for fast charging
  • High-speed re-charge


  • More expensive than the rest ( You get what you pay for )

See the latest prices on Amazon

Anker PowerCore II 6700, Compact Portable Charger

The smaller brother to the one above, the Anker PowerCoder 2 still has all the quality and style of its big brother but smaller and lighter.

This is also included in the list of top 5 best power banks on Amazon since it lightweight, compact, and supports iPhones and Androids with reliability to catch its looks.

You can charge your phones two to three times from 30% to 100% before it goes out of power. With a weight of 120 grams, you can definitely take this wherever you are. 

Just allocate 3.5 hours for it be fully charged and you can already enjoy your trip outdoor without worrying about gadget power shortages.

  • 6 LED Power indicator lights
  • Can charge an iPhone twice from one full charge
  • 18 Month warranty
  • Weighs less than 5 oz
  • Fully charged in under 4 hours


  • Lightweight
  • Style and quality build
  • Can charge an iPhone twice from one full charge
  • Clear 6 LED power indicators


  • Only 1 USB OUTLET

See the latest prices on Amazon

Ayeway Portable Power Bank

Another power bank with huge power storage is the Ayeway 26800 mAh again this portable power bank instantly filled me with hope thanks to its strong, clean design and feel.

You can always tell a quality product from the way it looks and feels and this one was good.

It felt and was heavier but that’s only because you get a high grade powerful battery inside. There is no way around the weight, if you want a quality product that will last for many charges then you’re going to have a heavier power bank, Fact!

I really liked the 2 USB outlets which means you can recharge two devices at once. I tested it on my phone and my wifes and it fully recharged both within 2 hours.

Fantastic, perfect for long road trips and really good for on the train when we both travel together or with the children.

  • Full charge time:12 hours
  • Weight 14.5 oz
  • Number of USB’s x 2
  • Lithium Battery cell
  • 18 Months Warranty 


  • Airport Approved
  • Clear LED display
  • Can charge a laptop or Tablet
  • Capable of recharging an iPhone 3-4 times
  • Quality look and Feel
  • Price


  • Heavy

See the latest prices on Amazon

How long does a power bank hold its charge?

Well, it depends. Each power bank has its won capacity that can support your gadgets. The bigger the battery capacity, the longer your power bank can hold its charge. This is the reason why you need to check the capacity first before buying. 

If you think you will need more than 20,000mAh for a day, then don’t go for lightweight power banks with less battery capacity. 

But, if you are looking for a compact one that will support you for a few hours, it’s okay to buy small power banks that are handier and easier to fit in your pocket.

What’s the ideal battery capacity?

The ideal battery capacity also depends on the preference of the user. Assess what you are going to charge when you go outside. Do you have more than one smartphone that you need to charge? Are you needing power support for your laptop too? 

If you have multiple gadgets that you need to power up, then you will be needing more than 50,000mAh. 

But, if you are just going out for a walk with one smartphone, a power bank with less than 20,000mAh can already help you survive.

What should you look for when buying a power bank?

When looking for a power bank to buy, focus on a few things: battery capacity, number of ports, size, and price. You will need more battery capacity if you are planning to leave your home for a whole day. 

Remember that your power bank needs to be charged too so if you are going to settle with lower battery capacity, you will have to charge your power bank for more than once or twice while you are out. Assessing the number of ports will also help you come up with a good buying decision. 

If you are often outside with more than one gadget, you would need a power bank with multiple ports too.

In terms of size, choose the one you are willing to bring. If you can’t bear storing a large pack of batteries in your bag while you travel, then go for lightweight power banks. 

If you don’t mind the size and want to focus on the battery capacity, then you should choose a huge battery capacity over the size. It’s also ideal to take note of the price. 

Not all power banks have the same pricing. The bigger the capacity is, the more expensive it is. Consider your budget when buying so you can prepare yourself financially.

If it’s big power you’re after then a portable Generator might be the one for you which can not only power your home appliances but also charge your phone and computer. You’ll need to make the right choice as not all generators are suitable for sensitive technology. Click here to find out why?

power bank

Conclusion: Which is better?

The question of which is better among the products listed in this article can only be answered by you. Your preference and needs will be highly considered to determine which is better among the choices. 

If it’s the most lightweight product that you want, Anker PowerCore Mini 3350 is the best. But, if it’s an amazingly powerful battery you are after then it has to be the Anker PowerCore for me. 

Just the look, feel and performance of this product stood out from the rest and with a good price point, it’s real value for money.

If you’re looking for something BIGGER that can run multiple products and even TV’s, Computers, and other electrical devices I would suggest reading our Power Bank complete review guide. We tested and reviewed the best BIG portable solar rechargeable power banks. 

Again, it’s better to evaluate your needs first so you can determine which is better for your use and make the right purchase. 


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All the article on Oofgrid offer help and practical advice for using and purchasing a portable generator. However, We are enthusiasts and not qualified electricians. Always seek professional advice when working with electrical or Petrol appliances.