Best 20000mAh Power Bank Review – May 2017

The Best High Capacity Portable Power Banks with 20000mAh or more.

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Best Power Bank List - 2016 - 20000mAh high capacity portable phone chargersWhen looking for the best 20000mAh power bank there are a few important features to consider other than the actual capacity of the battery pack. This really depends on your portable charging requirements. If you need to charge a couple of tablets or iPads at the same time, then the best 20000mAh power bank will be the one with the biggest max output. If you want to minimize the recharge time, then a Quick charge 3.0 power bank with a suitable QC 3.0 wall adapter would be the preferred option.

If you need some help understanding more about the specifications and features found on high capacity power banks, there’s a short guide at the bottom of the post.

Best 20000mAh Power Bank Shortlist – May 2017

See further down for more details on each Power Bank with links to our full reviews.
Brand Model No. Capacity USB ports Max Output Latest Price* Buy Online
Zendure A8 QC 3.0 26800mAh 4 6.1A $126.95 $89.95 view
EasyAcc PB20000QC4 20000mAh 4 6.1A $69.99 $39.99 view
RAVPower RP-PB052 22000mAh 3 5.8A $99.99 $36.99 view
RAVPower RP-PB043 20100mAh 3 3.1A $99.99 $49.99 view
EasyAcc Monster 20000mAh 4 4.8A $69.99 $30.99 view
Anker Astro E7 26800mAh 3 4A $119.99 $61.99 view
RAVPower RP-PB41 26800mAh 3 5.5A $129.99 $44.99 view
Price information last updated on the 3rd of May 2017 at 10:00 GMT
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com or Amazon.co.uk at the time of purchase will apply to the purchase of this product.

1. Zendure 2nd Gen A8 QC 3.0 Power Bank – 26800mAh


The Zendure A8 2nd gen portable charger, top of the power bank 20000mAh or more list

The Zendure A8 QC 3.0 features charge-through technology, digital power indicator, 4 outputs and a long-term standby which can retain 95% of it’s stored power after 6 months.

As well as it’s amazing features, the Zendure is also the most durable power bank available capable of withstanding the crush-weight of a car! The Zendure A8 is in our opinion the best looking high capacity power bank on the market – Read the full review
Brand Model No. Capacity USB ports Max Output Latest Price* Buy Online
Zendure A8 QC 3.0 26800mAh 4 6.1A $126.95 $89.95 view

Price updated on the 3rd of May 2017 at 10:00 GMT
*Product prices and availability are accurate as of the date/time indicated and are subject to change.
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The most durable and rugged portable charger available and one of the only few power banks with pass through charging.

2 – EasyAcc 20000mAh Power Bank with QC3.0 and Dual Charging


The EasyAcc Monster 20000mAh power bank will recharge 2 times faster than any other high capacity portable battery pack

The EasyAcc 20000mAh power bank features dual input ports and Qualcomm quick charge 3.0 technology.

A very reasonably priced and reliable high capacity power bank with an integrated torch ideal for reading at night. Comes with two high-quality charging cables  – Read the full review.
Brand Model No. Capacity USB ports Max Output Latest Price* Buy Online
EasyAcc PB20000QC4 20000mAh 4 6.1A $69.99 $39.99 view

Price updated on the 3rd of May 2017 at 10:00 GMT
*Product prices and availability are accurate as of the date/time indicated and are subject to change.
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Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.

The QC3.0 input and dual ports ensure the fastest recharge speed of any high capacity power bank.

3 – Ace Series RavPower Power Bank – 22000mAh


The New Ace Series RAVPower Power Bank

The Ace Series RAVPower power bank has the largest overall output of any portable charger and features the latest iSmart 2.0 charging technology.

The combination of ten built-in safety features and its UL94 V-0 fire-resistant housing makes the RP-PB052 one of the safety high capacity power banks available. It comes with two anti-tangle USB cables, a soft carry bag, and a lifetime warranty card.Read the full review
Brand Model No. Capacity USB ports Max Output Latest Price* Buy Online
RAVPower RP-PB052 22000mAh 3 5.8A $99.99 $36.99 view

Price updated on the 3rd of May 2017 at 10:00 GMT
*Product prices and availability are accurate as of the date/time indicated and are subject to change.
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Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.

Very affordable with a big maximum output, great for charging multiple devices at the same time

4 – Quick Charge 3.0 RavPower Power Bank – 20100mAh


The RAVPower Turbo+ power bank featuring the latest quick charge 3.0 and a type C USB input and output

The RAVPower quick charge 3.0 power bank is one of only a handful of high capacity power banks that feature the latest QualComm Quick Charge 3.0 technology.

With a QC 3.0 mains adapter, this RAVPower power bank takes just 4 hours to fully recharge. It also features a type-C USB port suitable for charging an Apple Mac book and other larger devices that require more that 2.4A – Read the full review
Brand Model No. Capacity USB ports Max Output Latest Price* Buy Online
RAVPower RP-PB043 20100mAh 3 3.1A $99.99 $53.99 view

Price updated on the 3rd of May 2017 at 10:00 GMT
*Product prices and availability are accurate as of the date/time indicated and are subject to change.
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Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.

Ideal for Type-C USB devices and for those with a Quick Charge 3.0 wall charger thanks to its QC3.0 input.

Alternative Quick Charge 3.0 Power Banks

Anker PowerCore 20000mAh Power bank with Quick Charge 3.0

Anker PowerCore 20000
Quick Charge 3.0 / 20000mAh

The New Anker 10000mAh Quick Charge 3.0 Power Bank, a smaller alternative to the RAVpower 20000mAh Quick Charge 3.0 Power Bank

Anker PowerCore 10000
Quick Charge 3.0 / 10000mAh

EasyAcc Quick Charge 3.0 Power Bank 20000mAh

EasyAcc QC 3.0 Power Bank
Quick Charge 3.0 / 20000mAh

5 – EasyAcc Monster 20000mAh Power Bank


The EasyAcc Monster 20000mAh power bank will recharge 2 times faster than any other high capacity portable battery pack

The EasyAcc 20000mAh power bank features dual input ports (4A).  This means you can recharge this battery pack with 2 regular USB cables.

If you need a fast charging 20000mAh power bank, but don’t want to buy a Q.C 3.0 external battery and wall adapter, then the EasyAcc Monster is a great portable charger for the price.  – Read the full review.
Brand Model No. Capacity USB ports Max Output Latest Price* Buy Online
EasyAcc Monster 20000mAh 4 4.8A $69.99 $30.99 view

Price updated on the 3rd of May 2017 at 10:00 GMT
*Product prices and availability are accurate as of the date/time indicated and are subject to change.
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Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.

The best recharge rate for a power bank without Qualcomm Quick charge technology

6 – Anker Astro E7 Power Bank – 26800mAh


The Anker Astro E7 is 2nd on our power bank 2000mAh or more list

The Anker Astro E7 deserves a spot on our list of the best 20000mah power banks due to its consistent reliability and impressive technology.

Its unique PowerIQ tech allows it to safely maximise it’s output depending on the connect devices to up to 3A from a single port. Compatible with larger devices like the 2015 12″ MackBook, the Anker Astro E7 is an extremely efficient and cost-effective high capacity power bank.
Brand Model No. Capacity USB ports Max Output Latest Price* Buy Online
Anker Astro E7 26800mAh 3 4A $119.99 $61.99 view

Price updated on the 3rd of May 2017 at 10:00 GMT
*Product prices and availability are accurate as of the date/time indicated and are subject to change.
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Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.

The best power bank for charging larger devices such as the MacBook, thanks to it’s 3A output for a single port.

7 – RAVPower Portable charger – 26800mAh


The RAVPower 26800mAh capacity power bank has the biggest max output of any other portable phone charger

Up until recently, the RAVPower 26800mAh power bank offered the largest Max output of any high capacity portable battery. This was recently superseded by RAVPower’s latest Ace series portable charger.

Its 5.5A and massive 26800mAh capacity still makes this Power Bank one of the best portable phone chargers available.
Brand Model No. Capacity USB ports Max Output Latest Price* Buy Online
RAVPower RP-PB41 26800mAh 3 5.5A $129.99 $44.99 view

Price updated on the 3rd of May 2017 at 10:00 GMT
*Product prices and availability are accurate as of the date/time indicated and are subject to change.
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Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.

The best large portable charger for power hungry mobile devices thanks to its big capacity and output.

8. LimeFuel Blast L200X PRO 20000mah Power bank

The LimeFuel Blast L200X Pro power bank also offers the rare ‘pass through charging’ technology. Being able to top-up multiple devices safely overnight while also charging the power bank is such a useful feature, especially on a high capacity power bank.

A stylish looking high capacity power bank with an anodized aluminium body, 4 USB ports and a high max output.

The LimeFuel Blast L200X PRO is a high capacity power bank with pass through charge technology

Buy Online

Price information last updated on the 3rd of January 2017 at 20:00 GMT
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com or Amazon.co.uk at the time of purchase will apply to the purchase of this product.

9. EC Technology 2nd Gen Deluxe Power Bank – 22400mAh

The EC Technology 2nd Gen high capacity power bank is exceptionally good value for money considering it’s features.

Ideal for anyone on a budget, due to its impressive reliability and overall efficiency rate. This charger rivals more expensive high capacity power banks but at a fraction of the cost.

The EC 22400mAh portable phone charger - 3rd on the best power bank 20000mAh and over list

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Price information last updated on the 3rd of May 2017 at 10:00 GMT
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com or Amazon.co.uk at the time of purchase will apply to the purchase of this product.

10. VINSIC Ultra Slim 20000mAh Power Bank

The VINSIC Ultra Slim 20000mAh Power Bank has a very slimline design.  It features a digital charge display which lights up when touched and has a nicely finished anodized aluminium case.

The VINSIC Power bank supports over-charged, over-discharged, over-voltage, over-current and short circuit protection to safe guard your devices.

The Ultra Slim Vinsic power Bank 20000mAh

Buy Online 

Price information last updated on the 3rd of May 2017 at 10:00 GMT
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com or Amazon.co.uk at the time of purchase will apply to the purchase of this product.

11. Zerolemon SolarJuice 20000mAh Power bank

The Zerolemon solarJuice power bank is rain resistant, dirt and shock proof. It features a solar panel for emergency charging and carabiner attachment making it ideal for taking outdoors.

As it’s a 20000mAh power bank, it’s not the lightest of travel batteries to take on a short hike. However, If you’re planning a long outdoor trip and are taking camera equipment, then this would be ideal and certainly worth the extra weight.

The Zerolemon is a high capacity 20000mAh Power bank designed for the outdoors

Buy Online 

Price information last updated on the 3rd of January 2017 at 20:00 GMT
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com or Amazon.co.uk at the time of purchase will apply to the purchase of this product.

Need help choosing the best 20000mAh power bank ?

If you are looking to buy a high capacity portable battery charger but are unsure of which specifications or features are important here’s some info that may be of help.

  • Capacity – Measured in mAh’s (milliampere-hour) is basically the amount of storage the power bank has. This amount is just a guide, the actual amount the battery delivers is dependent on its efficiency. This can be anywhere from 70%-85%. If you are charging a phone with a battery size of 2000mAh with a 20000mAh power bank, you’d get 10 full charges if it was 100% efficient (this will never happen). In reality, you are far more likely to get 7-8 charges.
  • Pass-through charge technology –  This allows you to plug devices into the power bank as it’s being recharged.  On high capacity power banks, this feature is extremely useful and not often seen.
  • Max Output – This refers to the overall output of the power bank. Typically more important on a high capacity portable charger, when recharging multiple devices at the same time. If your Smartphone requires 1A and your tablet requires 2.1A then a power bank with a 3.1A Max output would be sufficient.  If you were then to plug in a third device, the 3.1A would be shared, and the recharge time would take longer.
  • Additional Technology – Each power bank will have it’s own terminology, Anker call theirs ‘PowerIQ‘, RAVPower use the name ‘iSmart‘, Zendure has ‘Zen+‘ and the list goes on. There are some variables depending on the manufacturer, but in general, this relates to an adaptable output from each USB port. When you plug in a device, the power bank will identify it’s maximum recharge speed and deliver the correct amount of power.
  • Safety Systems – Most, if not all power banks will offer protection against short-circuits, over-current and overloads. Usually, the power bank will shut off and will require you to connect the charging cable to reset the system.
  • Battery Quality – This is something that you will need to consider. It’s hard to know about the quality of the Lithium battery inside without cracking the power bank open and having a look (not advisable). Generally speaking, if it’s ridiculously cheap it will likely be of a poor quality. My advice is to choose a recognised and trusted brand that has some control over their own R&D. There are so many companies attaching brand names on generic OEM power banks and selling them cheaply.  Portable charging devices like the Zendure A-Series power bank do cost more, but it’s for a good reason. – back to list

If you have found this post useful, please leave a comment or share it with friends using the social links below  – Thanks and happy charging!

35 COMMENTS

  1. I backed the Zendure Power Bank when it was being crowd funded, it’s an awesome charger. Very few have the ability to charge devices while also re-charging. This feature is amazing especially on a high capacity power bank. I plug my tablet into the Zendure and plug the Zendure into the adapter, once the iPad is fully charged the Zendure automatically stops feeding it juice and continues recharging itself until it’s also fully charged, then it shuts off the charge too.- Love it!

  2. Hi Oscar,
    Thanks for your comment, I totally agree it’s an amazing portable power bank, an absolute beast. I have the Zendure A8 and the A2, they are both awesome, the A8 for it’s huge capacity and the A2 for it’s compact size, I can’t fault them.

  3. Thanks for the guide, the whole mAh capacity thing was a little confusing. Why don’t they just label the power bank with the actual capacity after the loss of charge is account for?

    • Hi Bev, I think there are quite a few variables that will effect the efficiency. Some power banks may perform better than others, even if they are the same make and model. Even the cable itself and the device you are charging can effect it. All of the ones above perform at the top end of the scale, I’ve tested a few others that have struggled to achieve even 60% efficiency.

  4. The EasyAcc 20000mAh power bank is just what I was looking for, I burn through portable batteries like mad with photography work. I currently use two 10000mAh battery packs, because there is enough time to charge each of them over night, A 20000mAh typically takes around 12 hours from a mains adapter. Having a double input it’s ideal, I’m surprised more high capacity power banks haven’t added the feature, is this the only one that has it?

  5. The Zendure A8 does look really good, but it seems far more expenive than all the other battery packs on the list. The 20000mah LimeFuel Blast power bank seems much better value for money in my opinion. They both have pass-through charging and the LimeFuel has an extra 1A max output.

    • Hi Liam, the LimeFuel Blast is an awesome 20000mAh power bank and considerably cheaper than the Zendure A8. I do think the A8 has a far better build quality and some additional technology that sets it apart. It’s real important to have a Power bank that you can trust, the Zendure is so durable, they run it over with a car and it’s undamaged. The standby time on it is fantastic too, for a high capacity portable battery to still have 95% of it’s original charge after standing around for 6 months is pretty unique.

  6. Nice list, I was looking for an even larger power bank than 20000mAh, it seems like there are not that many decent ones to choose from, is there a reason for this? Thanks

    • Hi Ian,

      There are very few good power banks over 30000mAh. The only high capacity power banks I’ve seen above the 20000mAh bracket are poor quality and really cheap. The capacity can be a little deceiving sometimes, you will find some that suggest capacities of 50000mAh, but trust me, they are closer to 20000mAh. My advice would be to buy two good quality power banks with 20000mAh rather than a poor quality 40000mAh battery. That way you can recharge twice as quick.

  7. Thanks for the list, I’d have rated the RAVPower 26800mAh Power Bank higher, it’s got the biggest max output of them all, by far. For me, I often need to recharge 2 tablets at a time and a phone. The RAVPower Power Bank is the only one the this whole entire list with enough output to manage that without trickle charging them.

  8. I was planning on buying the Zendure A8, seems like they are only currently offering the Zendure A3 or A4 in the UK, shame because I really like the design 🙁

    • You may be able to buy the Zendure A8 from the US Amazon site at a cheaper price, which may compensate for the additional cost for the international postage? Worth a try, it’s a great Power Bank.

    • To get a good quality 20000mAh high capacity power bank for under $40 is a bargain, but considering the EasyAcc Monster has the double charging inputs, it’s seriously good value for money.

  9. The RAVpower 26800mAH power bank should be top of the list IMHO, max amps is worth more that pass through charging

  10. Anyone with a Quick Charge compatible phone should definetly opt for a power bank with Quick Charge technology, it makes a huge difference. You should feature more high capacity power banks with QC 2.0 and 3.0.

    • Hi Techman, thanks for the feedback! Rather than swarm the top of the list with Quick charge 3.0 power banks, I’ve added some alternative options to the RAVPower QC 3.0 charger. I do agree with you that it makes a massive difference to recharge times, but that’s only if you have the Quick Charge wall adapter too. Anker have just started selling their Powercore+ quick charge power bank with an included QC3.0 wall charger, seems like a sensible thing for the others to do as well.

  11. I bought the ravpower quick charge 3.0 power bank, I think my phone has Qualcomm 2.0 will this effect the speed?

    • Qualcomm Quick Charge technology is fully backward compatible, so if your phone has QC 2.0, a Quick Charge 3.0 power bank will provide a QC 2.0 equivalent fast charge – hope that helps.

  12. I visited quite a few sites today in search of buying advice regarding power banks. Your site was by far the best. Your research was thorough and concise and eliminated lots of the “junk” that other sites waste time on. As a result, I was able to find just the right power bank for my needs.
    Many thanks for your excellent recommendations. I also appreciated your explanation on the specs of power banks and the importance of each one relative to user needs.

    • Roy, Really appreciate the positive feedback, I’m amazed how little effort some of the more ‘well-established’ review sites make these days, especially when it comes to power bank reviews.

    • Thanks Andy! After reviewing so many power banks over the last few years, I think I’ve done the leg work required to make a useful and accurate list on the subject. I’m also looking into buying some accurate testing equipment to get some numbers on the actual efficiency rates of each of the power banks.

  13. Dear simon. Tha’ks for this brillant article. So usuful and clear! I was wondering though, how do i determin the output (or input? Not sure) my sony z5 xperia compact needs? And my galaxy tab 4? Where do i find this information in order to know what lax output i should be fine with…
    Thanks a lot!

    • Hi Jack, I believe the Sony Z5 has a 1.5A input and the Galaxy 4 would probably need a bit more. I wouldn’t be concerned about using any of the power banks on this list for either device. It’s actually the Phone or Tablet that’s drawing the charge rather than the power bank pushing it out if that makes sense? If you had a device that only required 0.5A plugged into a 2.4A output of a Power Bank, that’s all it would draw, the other 1.9A is redundant. Hope that helps and thanks for the feedback.

  14. Took your advice and bought the Ravpower 22000mah power bank, it arrived the next day (fully charged) and works like a absolute dream! Thank you! 🙂

    • You’re welcome, I’m currently using the RavPower Quick Charge 3.0 charger as my main high capacity power bank, but the 22000mAh is just as good, just takes a little longer to recharge.

  15. So pleased to see the Zendure A8 portable charger got the Quick Charge 3.0 update, Iove the original design of the power bank, but I really wanted a QC 3.0 compatible charger for my HTC 10 phone.

  16. Did anyone notice that only Zendure A8 has a digital display that accurately tells you exactly how much power it has left? That feature is awesome. Zendure A8 is also the only one that has pass-through charging. It also has the highest output: 6.1Amps!

    • You’re quite right Teddy, the Zendure A8 got a serious upgrade recently. It’s definitely going to be higher up the list, I’m just waiting for a review unit to arrive.

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