I have used this Anker PowerCore II for almost a year now. This has been a fantastic travel companion for the money, I would have no hesitation recommending it to anyone looking to extend their smart phone's operational battery life, or for simple recharging uses. 1 phone, 2 phones, Android, Apple, any phone with a USB charger has worked with this product. The amount of extended life I have gotten out of this PowerCore II has been at times exceptional. Lost power at home one weekend. I ended up entertaining myself with my Samsung Note phone for those 2 and a half days running exclusively off the Anker.... emailing, surfing the internet, watching YouTube videos (cats, mostly), and so on. I still had a couple LED dots worth of power on the Anker by the time the home electricity returned. I was impressed!
I use this device weekly, as many times I am away from a power outlet on the road, or on weekend excursions. It works, what can I say?
If there is any "down side" to the PowerCore II, it'd probably be that it takes around 6 to 10 hours to fully charge it...depending on a couple things.
If you have a direct wall plug, I've gotten from zero to full charge in 6 hours. Maybe 7 now that it's about a year old, but still... Anker was up front about that in the pamphlet supplied, and it's really not a bother. Plug it in at home, work, wherever and go about your day. By the time you're done with work, it'll be full.
What I observed that will potentially slow down the charging speed of this product is if you have it plugged into something like a power strip.
Even then, I suppose it depends on what KIND of strip it is. Newer more recently bought power strips with the built-in surge protection and red light -up click-on/off switches I have tried and the PowerCore II seems to act REALLY pokey on those in relation to charging speeds. One day I had this Anker on one such power strip and it only charged up three LED dots worth on the charge indicator after being on it for 4 hours. Bah. Maybe something with the surge-protection circuitry keeps the Anker from charging at full speed. I don't know.
However, I HAVE charged this unit at work using a really OLD power strip.... stamped metal beast of a thing with a simple on/off switch (no surge protection I am assuming) and it charged the PowerCore II just as fast as if it were plugged directly into a wall socket....so....Yay for old electrical strips I guess?
My point being, the PowerCore II prefers direct wall outlet access for maximum charging speed as far as I can tell.
I have *NOT* tried charging this Anker from a plug in a vehicle, or off of a generator as none of my cars are utilitarian enough to include a dedicated power outlet and I do not own a generator. Maybe someone else in these reviews has been lucky enough to accomplish that. I would imagine doing so would result in probably the same performance as seen from coupling to a wall outlet, but that's just an assumption on my part.
Unit has held up well, even the black mesh carry bag that came with it is still reasonably no worse for wear, despite having traveled with this device a lot between home and work, camping, beach days, and so forth.
Definite thumbs-up from me, Anker!
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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 | — | $32.99 | $36.99 | -5% $39.99 List: $41.99 | -10% $28.79 Typical: $31.99 | $36.99 |
| Delivery | — | Get it as soon as Monday, May 20 | Get it as soon as Monday, May 20 | Get it May 20 - 23 | Get it as soon as Monday, May 20 | Get it as soon as Wednesday, May 22 |
| Customer Ratings | ||||||
| For traveling | ||||||
| Battery life | ||||||
| Charging power | ||||||
| Sold By | — | weiyier | VIYISI-US | AnkerDirect | AnkerDirect | Jinjiang Jeep Czech Clothing Co., Ltd |
| capacity | 20100 milliampere hour | 20000 milliamp hours | 10000 milliamp hours | — | 20000 milliamp hours | — |
| connector type | Lightning, Micro USB, USB Type C | Lightning, USB Type C | USB type C, Lighting, Micro USB,, AC wall plug | USB-A*1 + USB-C*1 | USB Type C | USB Type C |
| number of ports | 2 | 5 | 4 | 2 | 2 | 3 |
| compatible devices | iphone | Smartphone, Smartwatch, Table Lamp, Headphone | iPhone, Airpods, USB C Android phones, Smartphone | iPhone 13 / 13 Pro / 13 Pro Max / 12 / 12 Pro, Samsung, iPad Pro, and More, Tablet, iPhone 15/15 Plus/15 Pro /15 Pro Max | iPhone 15/15 Pro /15 Pro Max/14/14 Pro, Samsung, iPad Pro, and More | Smartphone |
| voltage | 12 volts | 5 volts | 5 volts | 5 volts | 5 volts | 5 volts |
| weight | 0.81 pounds | 280 grams | 0.3 kilograms | 12.2 ounces | 465 grams | 0.22 kilograms |
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, 2020Color: whiteVerified Purchase
CHAIX
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