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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

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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 67 Showing 1,321-1,340 of 1,403 reviews
  • Rated 1 out of 5 stars

    Did not charge

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Bought to take on vacation with me and the battery did not charge. You only have a 15 day warranty so if you buy make sure the actual battery charges and all its accessories work. Waste of my money.

    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 1 out of 5 stars

    Battery sucks

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    Posted . Owned for 2 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This thing does not work, I just tried it for the first time today and I see it’s already not returnable? I’m in Europe and will not be back until 6/1.

    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

  • Pros mentioned:
    Battery life, Charging speed, Portability
    Tech Insider Network Member

    Rated 5 out of 5 stars

    Nice Power Brick

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    Tech Insider Network Member
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Anker has a penchant for making helpful devices, and this portable battery charger is no different. It charges quickly via whatever cable your device uses. My only complaint is that doesn't have wireless capability, but it is not marketed as having wireless charging ability. Instead, if focuses on a USB connection, which is faster, anyway. It's a great option for things like camping or hiking trips. It stores a lot more juice than most other portable battery chargers. It's blazingly easy to use and will match up with your device's fastest charging speed. Of course, it's not going to be as fast as having your device plugged into a wall outlet, but it is extremely efficient for a portable charger.

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

    No travel pouch : (

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

    The travel pouch listed on the box was not included. The user guide should explain flashing light when charging the Anker PowerCore. The optional output charging at 2.4 amps is great.

    I would recommend this to a friend
  • Pros mentioned:
    Battery life, Size, Usb-c
    Tech Insider Network Member

    Rated 5 out of 5 stars

    Perfect Pocket Charger

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    Tech Insider Network Member
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This is a perfect pocket charger, that helps me keep my phone charged. Did some testing with it and it easily charged my phone for a multiple days. I was thrilled, even for the size it still easy to carry in a pocket of my winter coat or my laptop bag. Will fast charge my Nokia phone. It just works as a battery. I can easily charge two devices if needed. This is perfect if you travel a bit as its easier to charge your devices without having to find a plug or worry when visiting friends about leaving the phone behind since you can charge in your pocket. This is just a perfect size and since it holds enough for a few charges you can be a friend to your friends too.

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

    This item is just ok.

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    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    this item is just ok, slow to charge sometimes but will power cell phone and electronic items such as ear pieces.

    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:
      - The model of your phone, such as iPhone 7 or Galaxy S8
      - How long does the battery take to fully charge your phone when you're not using the phone (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 1 out of 5 stars

    Waste of money - stopped working after first use.

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Bought two of these for an overseas trip where power is scarce. Both stopped working after the first use? A waste of $120.

    No, I would not recommend this to a friend
  • Rated 1 out of 5 stars

    Stopped working

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    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Stopped working two weeks after I bought it. Very disappointed since I usually think highly of anker.

    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

  • Rated 1 out of 5 stars

    Not worth the money!

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Wont charge. Tried for 48 hours only hit one bar. Doesn't hold charge long. Returned for a refund.

    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

  • Rated 1 out of 5 stars

    Quality Not the Same

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    Posted . Owned for 1 year when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This worked as it should up until December 2022. Kept trying to get it to work. Unfornatatly, it will not charge anything.

    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 1 out of 5 stars

    Not really good

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    Posted . Owned for 4 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Lo pude usar unos meses,ya luego no me quiso coger mas carga

    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

  • Rated 1 out of 5 stars

    Unhappy

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    Posted . Owned for less than 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Paid for a new one sent me a used one. Open box wow thanks a lot best buy

    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

  • Rated 1 out of 5 stars

    Paper weight

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Takes forever to recharge the charger and and doesn’t last long charged my phone twice before needing to be recharged

    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!

      To help us pinpoint the issue, please let us know the following information:
      - How long will the battery last if it is not used after fully charged?
      - If another cable and another charger helps at all

      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 1 out of 5 stars

    Nope!

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    Posted . Owned for 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Doesn’t hold as much and I couldn’t charge my phone more than 1.5 times ! Don’t waste your money

    No, I would not recommend this to a friend
  • Rated 1 out of 5 stars

    Open box

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    Posted . Owned for 9 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Picked it up open box and it didn't work, had to get the new in box

    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

  • Rated 1 out of 5 stars

    Horrible product

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    Posted . Owned for 9 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Horrible device. It literally takes a few days for the charger to charge. definitely not ideal for daily 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!

      Normally, this battery takes about 7-7.5 hours to fully recharge with a 5V/3A wall charger. To help us pinpoint the issue, please let us know the following information:
      - What model and type of wall charger/AC adapter you are using
      - If the battery charges fine with another wall charger and cable
      - About how long it takes to recharge the battery (if it will charge fully at all)

      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 1 out of 5 stars

    Received discussing unit

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    Posted . Owned for less than 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Order this as "Open Box - Excellent" the item is scuffed and has gunk in the charging ports. Far from "Excellent"

    No, I would not recommend this to a friend
    • Brand response from Roav 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.

      We are dedicated to ensuring your 100% satisfaction. 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! roav

    • 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.

      We are dedicated to ensuring your 100% satisfaction. 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 1 out of 5 stars

    Wouldn’t charge two iPads at once

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    Posted . Owned for less than 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This unit wouldn’t charge two iPads at once. I exchanged for a Mophie and it seems to be doing the job fine.

    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 let us know the model of your device(such as iPhone 6 or Galaxy S8) and try the following steps to see if the issue persists:
      - If another known working cable helps

      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 1 out of 5 stars

    Sure

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    One output stop working after 2 weeks of using and is hard to charge

    No, I would not recommend this to a friend
  • Rated 1 out of 5 stars

    Does not deliver for the price

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    Posted . Owned for 3 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Would not recommend this, not worthy for the price , battery performance is below average

    No, I would not 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.

      We are dedicated to ensuring your 100% satisfaction. 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