Overall, I'm really glad I made this purchase. It has helped me to charge my devices at times that were convenient for me. For example, my phone seems to have a smaller battery charge per day but this device keeps it charged when I am outside my car or away from a wall or computer. It is very convenient to be able to charge your phone in a hotel cafeteria area having breakfast or when in bed while away from a charging outlet.
I needed to buy charging cables for my phone recently and this device helped me to determine, on the spot, that the 3rd party cables wouldn't charge my version of the iPhone. I was able to return the cables and test another set of cables for a charge without having to find my own wall outlet or go to my car. Very convenient for me.
The device holds a good amount of charge capacity so it doesn't need to be fully charged to charge your phone well. However, it you like to see the PowerCore always at a full charge, be aware that it will take some time to completely charge the Anker PowerCore (hours). The size of PowerCore is a bit long, which I understand, but it makes it difficult to charge devices somewhat in your pocket or on your person if you don't have a carry-on bag/backpack/purse or a coat with large pockets.
**UPDATE: See bottom for Anker response to my Cons** -- because of great customer service and the explanations, I will update to 5 stars.
Pros:
- Carries a big charge at full capacity (capable of charging iPad tablets, phones, etc.)
- Charges up to two devices via USB (be careful to check your cables as some do not work with devices by model)
- Convenience to charge your devices at any location (bed, table, anywhere)
- Easy-to-use
Cons:
- Takes a while to charge up to full capacity (even with 5V 2.1 Amp charger -- but you don't need full to charge your phone completely)
- Cannot receive a charge and charge other devices at the same time
- Size is a bit long so it may be difficult to use on your person/on-the-go if can't stop or put it down somewhere or in a purse/bag
Anker response to Cons: (shortening response to details)
1) "Though we are trying our best to make it more compact, as it contains 6 cells of battery inside, it might not fit completely when putting it in a pocket. However, we will file out your feedback and suggestion our future product's improvement and design."
2) "Please kindly understand that we actually made the decision to remove this function from our portable chargers. Because when pass-through charging, if there is a difference between the output of the wall charger and the input of the device being recharged it can cause the portable charger to rapidly power on and off. This increases charging times for both the portable charger and your device, risks causing damage to the battery cells and can significantly shorten the portable charger's lifespan."
3) "What concerns us is that this model seems to take long time to recharge itself for you. We have made an improvement of this model by enabling the quick recharge feature. Per our internal test, it shall be able to recharge fully with about 5 hours when you using a QC 3.0 wall charger. But if you use a 5V/2A wall charger such as iPad charger, it shall take around 10 hours then."
There is a newer model of this item:
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Compare with similar items
This Item  Anker PowerCore II 20000, 20100mAh Portable Charger with Dual USB Ports, PowerIQ 2.0 (up to 18W Output) Power Bank, Fast Charging for iPhone, Samsung and More (Compatible with Quick Charge Devices) |  |  |  |  |  | |
| Price | Currently unavailable. | $39.99 | $25.99 | $29.99 | $49.99 | -29% $49.99 List: $69.99 |
| Delivery | — | Get it as soon as Sunday, Aug 4 | Get it as soon as Sunday, Aug 4 | Get it as soon as Sunday, Aug 4 | Get it as soon as Sunday, Aug 4 | Get it as soon as Monday, Aug 5 |
| Customer Ratings | ||||||
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| Sold By | — | AnkerDirect | AnkerDirect | AnkerDirect | AnkerDirect | EnerwowDirect |
| capacity | 20100 milliampere hour | 20000 milliamp hours | 10000 milliamp hours | 10000 milliamp hours | — | 50000 milliamp hours |
| connector type | Lightning, Micro USB, USB Type C | USB-A*1+USB-C*1 | USB-C*1+Built-in C Cable*1 | USB-C*2 + USB-A*1 | USB-A*2 + USB-C*1 | USB Type C |
| number of ports | 2 | 2 | 3 | 3 | 3 | 4 |
| compatible devices | iPhone X, iPhone 8, iPhone 7 Plus, Galaxy S8, Galaxy S7 | iPhone 15/15 Pro /15 Pro Max/14/14 Pro, Samsung, iPad Pro, and More | — | — | Tablet, iPhone 15/15 Plus/15 Pro/15 Pro Max, iPhone 14/13/12 Series, Samsung, iPad Pro, AirPods, Apple Watch, and More | iPhone 14/14 Pro Max, iPhone 13/13 Pro Max, iPhone 12, iPhone 11, iPhone X, iPhone 8, iPhone 8 Plus, iPhone 7, iPhone 7 Plus, iPhone 6/6S, iPhone 6/6S Plus, iPhone 5/5S/SE, iPhone 5C; Samsung Galaxy S21 S20 S10 S9 Plus, Samsung Galaxy S 8 Plus. Samsung Galaxy S 7. Samsung Galaxy S 6, Samsung Galaxy S 6 Edge, Samsung Galaxy S 5; Note 8 oneplus 2 oneplus 5t s8 plus Samsung Galaxy Note 8 Samsung Galaxy S8 Samsung Note 8 Samsung S8 LG V30 Xiaomi Mix 2 HTC U11 Nokia 8 Google Pixel 2 OnePlus 5 Nintendo Lumia 950 Samsung S8 Plus LG V8 Plus LG V3 20 Xiaomi Mix. HTC U Ultra Nokia 7 Google Pixel Lumia 950XL LG G6 Xiaomi 6 HTC U11 Life Google Nexus 5X OnePlus 3T Samsung Galaxy S8 plus LG G5 Xiaomi 5S HTC 10 Google Nexus 6P Xiaomi 5X Xiaomi 5C Xiaomi 5 Xiaomi 4C Xiaomi Note 3 Xiaomi Note 2 Mate 30/30 Pro/ 20 Pro / 20 Pro / 20 Pro / 20 Pro / 20 Pro / 20 Pro / 20 Pro / 20 Pro / 20 Pro / 20 Pro / 10 Pro / 10 / 10 Pro. P40/ 40 Pro/ 30/ 30Pro/20/20pro/10/10 Pro |
| voltage | 12 volts | 5 volts | 5 volts | 5 volts | 5 volts | 5 volts |
| weight | 11.4 ounces | 465 grams | 0.48 pounds | — | 1 pounds | 1.46 pounds |
From the manufacturer
Product Highlights
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Perfectly PortableSlim, ergonomic design and grippable texture to go wherever you need to go. |
Twin USB OutputPump a week’s worth of power into two devices simultaneously. |
Unrivaled CompatibilityAdvanced charging technology ensures the fastest possible charge for almost any device. |
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| PowerCore II 20000 | PowerCore 20100 | PowerCore Speed 20000 | PowerCore 26800 | PowerCore Speed 20000 PD | PowerCore+ 26800 PD | |
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| Customer Reviews |
6,605
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47,315
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2,788
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37,422
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739
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2,514
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| Price | — | $49.99 | — | $59.99 | — | — |
| Charging Technology | PowerIQ 2.0 | PowerIQ | Quick Charge 3.0; PowerIQ | PowerIQ | Power Delivery; PowerIQ | Power Delivery; PowerIQ |
| # of iPhone XR charges | 4.2 | 4.2 | 4.2 | 5.6 | 4.2 | 5.6 |
| # of iPad mini 2019 charges | 2.4 | 2.4 | 2.4 | 3.2 | 2.4 | 3.2 |
| # of Samsung S10 charges | 4.5 | 4.5 | 4.5 | 6.1 | 4.5 | 6.1 |
| # of USB Charging Ports | 2 | 2 | 2 | 3 | 2 | 3 |
| Output | 18W Port: 5-9V=2A, 9-12V=1.5A; 12W Port: 5V=2.4A | 5V=4.8A (2.4A max per port) | Quick Charge 3.0: 5-8V=3A, 8-10V=2.4A, 10-12V=2A;PowerIQ: 5V=2A | 5V=6A (3A max per port) | PD Output: 5V=3A, 9V=2.6A, 15V=1.6A Standard Output: 5V=2A | PD Output: 5V=3A, 9V=3A, 12V=2.5A, 15V=2A，20V=1.25A Standard Output: 5V=3A(3A Max Per Port） |
| Max Input | 5-9V=2A | 2A | Quick Charge 3.0: 5-9V=2A, 9-12V=1.5A | 4A (dual input) | 5V=3A, 9V=3A, 15V=2A, 20V=1.5A | PD Input: 5V=3A, 9V=3A |
| Color Selection | Black. White | Black, White, Blue, Red | Black | Black, White | Black | Black |
| Size | 6.7 x 2.4 x 0.9in | 6.6 x 2.4 x 0.9in | 6.6 x 2.4 x 0.9in | 7 x 3.1 x 0.9in | 6.5 x 2.4 x 0.9in | 6.5 x 3.1 x 0.9in |
| Weight | 369g/13oz | 356g/12.56oz | 357g/12.6oz | 490g/17.28oz | 358g/13oz | 576g/20.3oz |
From the brand
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We want you to live without the inconvenience and uncertainty of where your next charge is coming from.
Our chargers and accessories don't just power up your devices, they offer the tech experience you want with zero restrictions.
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Reviews with images
... is my second Anker charger and I am very happy with this brand
This is my second Anker charger and I am very happy with this brand! My first one lasted over 3 years and still works but is on its last leg. I bought the 20,000 because it was at a great price that I couldn’t turn down and about 7,000 more capacity than my previous charger. I also loved how slender it is vs my old one which is thick and wide. My only complaint is the weight of it. I thought with technology improvements over the years that they would have figured out how to make them lighter but the new model is still quite heavy at 12.65oz which is 2oz heavier than my previous model. It’s not the biggest deal because it’s worth have an extra long battery life without having to constantly re-charge your spare battery. I also love the battery life indicator wheel which has 8 dots instead of the 4 on my previous model. The battery indicator wheel is so much easier to read now and I don’t have any issues trying to figure out when I’m running low on juice. The battery came with a nice bag with a drawstring so it doesn’t get all scratched up in the bottom of my purse. I also really appreciate the outter shell of the battery being matte instead of shiny like my previous model so I am hoping to show even less wear on it as the years go by. The battery charges quickly and is long lasting. I will update my review if anything else arises but so far so great!!
Top reviews from other countries
Redheaditor
Charge for a week, cabin bag friendly travel essential
Reviewed in the United Kingdom on February 12, 2020CHAIX
Enorme quantie d'energie en reserve pour vos smartphones. Tres belle qualite
Reviewed in France on September 19, 2019James C.
Buy with real confidence
Reviewed in the United Kingdom on September 19, 2019Björn B.
Top Verarbeitung, riesen Powerspeicher
Reviewed in Germany on December 2, 2018