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Customer Ratings & Reviews

Your price for this item is $13.99
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The comparable value price is $59.99

Customer reviews

Rating 4.7 out of 5 stars with 1403 reviews

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Rating by feature

  • Value

    Rating 4.6 out of 5 stars

  • Quality

    Rating 4.7 out of 5 stars

  • Ease of Use

    Rating 4.8 out of 5 stars

Pros mentioned filter

Cons mentioned filter

93%would recommend to a friend

Customers are saying

Customers have good things to say about the PowerCore III 20K mAh USB-C Portable Battery Charger's long battery life, convenient portability, and compact size. Many appreciate its multiple charging ports, including USB-C, and find the performance and design to be excellent. While some find it a bit heavy, most agree it's a worthwhile purchase.

This summary was generated by AI based on customer reviews.

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Page 70 Showing 1,381-1,400 of 1,403 reviews
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Kept my phone alive

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Lasted me a whole day and then some when at a music festival!

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Held great charge

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Used on 10 hour trip and didn't need to recharge at all

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Literally never runs out!

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I love this thing. I've been using it for my led light therapy brace for weeks, and it's still almost full!

    I would recommend this to a friend
  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    Good product

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Very good products l dont have any regrets of buying.very handy and long lasting charge

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    GREAT

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Works like its sopposed to.It has a sleek design defiantly worth the 60 buckaroons.

    I would recommend this to a friend
  • Rated 3 out of 5 stars

    Ok for phones, surprising limits though

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Was on a long road trip with the family and picked up one of these to keep everyone's devices up and running. We picked up the 20k version hoping it would be enough juice to handle a wide range of devices. Worked great for phones, iPhone 13 through USB C charged fairly quickly but I was a bit surprised that the PowerCore was down to 50% after a few hours of charging 1 or 2 phones in the car. Recharged overnight as I needed it for the main issue which is MacBook Pro 16". Initially plugged it in via USB C and it wouldn't charge at all. I turned off wifi, bluetooth, safari, mail, almost all apps and cranked the brightness way down. It only seemed to charge the laptop when it was shutdown. Going from 13% to 43% in a few hours. I was then able to work (again in low power mode, no internet, etc) and the battery stalled at 43% no gain but no loss. About a bit less than 2 hours of use and the PowerCore was down to 25%. I expected a lot more from a 20k charging unit. Not enough power for a Laptop. Not even close to the advertised amount of charge it would hold - in half a day it ran down to 50% on 2 phones, another half day down to 25% on the laptop. Had high hopes for this as it seemed a great solution for long road trips, etc. but now just seems another device that needs full recharge before every use.

    No, I would not recommend this to a friend
    • Brand response from Anker Team
      Posted .

      Thank you so much for sharing your experience. We're really sorry you've encountered this issue!

      If possible, please try the following steps to see if the issue persists:
      - How many charges the battery can give your device when you're not using it (when it's in power-saving mode)
      - If another cable helps at all
      - How the PowerCore works with other phones/devices 

      If those don't help, please reach out to us via support@anker.com or call us at +1 (800) 988 7973. We are more than happy to assist you further.

      We offer an 18-month warranty for this product, plus lifetime technical support. Our standard for responding to email quests is less than 24 hours, and we look forward to hearing from you! anker

  • Rated 5 out of 5 stars

    Worth it

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great product! Would highly recommend it. Good for everything

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    My energizer

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Work really well. So convenient I take where ever I go out .

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Excellent

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Does exactly what it says and I can charge multiple devices at once. I love this thing.

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Great overall

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great design and great build quality, solid product.

    I would recommend this to a friend
  • Rated 4 out of 5 stars

    PowerCore lll 20k

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Always happy with Anker products. I wish the battery level indicator was brighter

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    This is a good one

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Works as advertised. And here are the other 30 needed characters

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Portable energy bank

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Excellent product, cheaper and easy to use and fast shipping

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Great charger

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    My daughter really enjoyed getting this for Christmas.

    I would recommend this to a friend
  • Cons mentioned:
    Weight

    Rated 3 out of 5 stars

    None

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    The charger is heavy. I didn’t except to be light.

    No, I would not recommend this to a friend
  • Rated 2 out of 5 stars

    Not As Durable, but definitely can hold a charge

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I had bought this in the beginning of September for College, when my 5-year old iPhone battery began drying out throughout the days I would be at Uni. It worked great until it had suffered a drop, the result of which had made it unable to charge, both in-take charge and charge my phone. I was thoroughly disappointed to find out that these powerbanks are not as durable as they may seem. What a shame.

    No, I would not recommend this to a friend
    • Brand response from Anker Team
      Posted .

      Dear Customer,

      I am truly sorry to hear that you are experiencing this issue. We understand how frustrating it can be and we appreciate your patience.

      Please rest assured that we stand behind our products and are willing to provide assistance within our capacity. We are committed to ensuring your satisfaction and resolving your concerns promptly.

      You can reach out to us via support@anker.com or call us at +1 (800) 988 7973. Our customer service team is always ready to help you.

      We look forward to your message so we can address your issue as soon as possible. Thank you for bringing this to our attention and giving us the opportunity to make things right.

      Best Regards, anker

  • Pros mentioned:
    Battery life

    Rated 5 out of 5 stars

    This is perfect

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    excellent powerbank for using it when there is no power.

    I would recommend this to a friend
  • Rated 1 out of 5 stars

    Will Not Charge my devices

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Bought this because it was the highest rated. I can charge the powerbank, but I cannot charge any phone on it. I've tried OEM cables, and 3rd party cables. I can't get the device to enter "trickle" mode either. I tap the button and the lights come on and then they go away. I'm not sure if I bought a faulty device. I don't have my receipt anymore. Feels like a big waste of time and money for this to flop right out of the box.

    No, I would not recommend this to a friend
  • Rated 2 out of 5 stars

    Charger/ returned it….

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    So sorry to rate so low but no matter how many instructions it had we had a hard time figuring it out… I will just stick to my plug in charger…..Thank you….

    No, I would not recommend this to a friend
    • Brand response from Anker Team
      Posted .

      Thank you so much for sharing your experience. We're really sorry you've encountered this issue!

      If possible, please try the following steps to see if the issue persists:
      - To recharge the battery itself, try another wall charger, wall outlet, and cable
      - To charge another device, try another cable and try the powerbank on another device

      If those don't help, please reach out to us via support@anker.com or call us at +1 (800) 988 7973. We are more than happy to assist you further.

      We offer an 18-month warranty for this product, plus lifetime technical support. Our standard for responding to email quests is less than 24 hours, and we look forward to hearing from you! anker

  • Rated 2 out of 5 stars

    Missing pouch.

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Just bought this today from local best buy. It DID NOT come with a pouch as advertized on the website and on the box.

    I would recommend this to a friend
    • Brand response from Anker Team
      Posted .

      Thank you so much for sharing your experience. We are sorry to hear you are not satisfied with this item. We really appreciate your feedback to make this item better.

      Kindly note that in order to get a sustainable supply of some components/materials, we have canceled the pouch for some of our products. We have updated the listing to remind the customer that the pouch is not included in the "What you get". So sorry that this does not draw your attention and causes an unpleasant experience. anker