3-Day SaleEnds 12/8. Limited quantities. No rainchecks.Shop now

Skip to content
Main Content

Customer Ratings & Reviews

Your price for this item is $13.99
Clearance
The regular price is $59.99

Customer reviews

Rating 4.7 out of 5 stars with 1384 reviews

Rating Filter

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 are enthusiastic about the PowerCore III 20K mAh USB-C Portable Battery Charger's fast charging capabilities, portability, and long-lasting battery life. They appreciate its compact size and high capacity, making it convenient for travel and daily use. While some users find it to be a bit heavy, many are satisfied with its overall performance and reliability.

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 1 Showing 1-20 of 1,384 reviews
  • Pros mentioned:
    Fast charging, Portable

    Rated 5 out of 5 stars

    Great purchase

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

    This is a great portable charger. It fits perfectly in the pocket in my backpack and it is light weight. I am able to get multiple charges which I love. I use it when I am out hiking and I need to charge my phone on the go quickly.

    I would recommend this to a friend
  • Pros mentioned:
    Fast charging, Long lasting, Portable

    Rated 5 out of 5 stars

    Great product, great purchase!

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

    Works great, charges fast and lasts a while before it needs to be charged up again. Very lightweight and fits easily in your bag.

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

    Rated 5 out of 5 stars

    Reliability.

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

    Portable powerful and reliable when you don’t have time to look for an outlet and you’re running all around and 95 hours of charge you can beat it. Highly recommend it.

    I would recommend this to a friend
  • Pros mentioned:
    Capacity, Fast charging
    Cons mentioned:
    Accessories

    Rated 4 out of 5 stars

    Fast charger, no pouch.

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

    Been using a older 13k mah anker that came with a pouch. This is a faster charger, but didnt come with a pouch.

    I would recommend this to a friend
  • Pros mentioned:
    Capacity

    Rated 5 out of 5 stars

    Packs all power for all your devices

    |
    |
    Posted . Owned for 1.5 years when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I love this thing. I've had it for a few years now and it has never let me down. I have used it to charge my phone, my little one's iPad on road trips, Nintendo Switches, Bluetooth speakers, and more. I would like it even more if it had two USB-C ports but still a great product.

    I would recommend this to a friend
  • Pros mentioned:
    Capacity

    Rated 5 out of 5 stars

    Lots of juice for backpacking!

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

    Purchased this 20K mAh charger to replace a 3-yr-old 10K charger to keep my Pixel 6 Pro phone alive on a 4-day backpacking trip. Tested it before the trip and it was able to fully charge the phone 3-1/2 times. It seems to take a long time to charge the charger (overnight), but that's been my experience with multiple chargers over the years.

    I would recommend this to a friend
  • Pros mentioned:
    Capacity, Fast charging

    Rated 5 out of 5 stars

    Great power bank

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

    Was able to charge my iPhone 13 from 20% to 100% twice before having to recharge it

    I would recommend this to a friend
  • Pros mentioned:
    Long lasting, Portable

    Rated 5 out of 5 stars

    Great choice

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

    Good portable charger. Last a long time and not that heavy!

    I would recommend this to a friend
  • Pros mentioned:
    Fast charging

    Rated 5 out of 5 stars

    Backpacking battery

    |
    |
    Posted . Owned for 1.5 years when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This thing is pretty amazing. It charges fast and it lasts as long as I need to charge things up when I'm out backpacking.

    I would recommend this to a friend
  • Pros mentioned:
    Capacity

    Rated 5 out of 5 stars

    Best charger ever!

    |
    |
    Posted . Owned for 11 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    It’s an amazing charger! I bring it everywhere with me. It last around 3-4 days. The only thing that sucks is that it does take a long time to charge but besides that it’s a great charger.

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

    Great charger!!!

    |
    |
    Posted . Owned for 1.5 years when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I use this everyday and get multiple charges out of it. I have had it for 2 years now. It has been through the ringer and I'm still very impressed.

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

    Rated 5 out of 5 stars

    A good battery

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

    It has alot of battery life while also a resonable size (about the size of a cased phone) there are smaller ones than this but price to performance wise this is the sweet spot for me.

    I would recommend this to a friend
  • Pros mentioned:
    Capacity
    Best Buy Employee

    Rated 5 out of 5 stars

    Advanced Portable Battery

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

    Love this portable battery and wall charger. Enough juice to fast charge my iPhone 13 Pro x4, with power to spare for my Apple Watch and AirPods. The 4 LED lights make it easy to know how much battery you have left.

    I would recommend this to a friend
  • Pros mentioned:
    Fast charging

    Rated 5 out of 5 stars

    Best power bank!!

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

    Rapid cell phone charging, handy during trips and power outages!!

    I would recommend this to a friend
  • Pros mentioned:
    Fast charging

    Rated 5 out of 5 stars

    Fast and reliable

    |
    |
    Posted . Owned for 11 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This thing charges fast! The usb-c port charges devices more quickly and I love that it has a battery life indicator.

    I would recommend this to a friend
  • Pros mentioned:
    Fast charging

    Rated 5 out of 5 stars

    Amazing Quality and Fast Charge

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

    This is one of the best battery packs that they have at Best Buy. With the USB-C port, I can charge up all my devices super quick and super fast. Love the build quality of the product as well. It's a life-saver for my iPhone XS Max!

    I would recommend this to a friend
  • Pros mentioned:
    Long lasting

    Rated 5 out of 5 stars

    Amazing Portable Charger

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

    I have been using this charger for over 3 months and i used it on a vacation it worked amazing the whole time it was able to charge my iphone atleast 5 times fully.

    I would recommend this to a friend
  • Pros mentioned:
    Fast charging

    Rated 5 out of 5 stars

    Anker portable battery USB C

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

    It’s a good portable battery if your phone is running low in charge. It’s support fast charging up to 18 W. And it’s good for a long day use of your phone.

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

    Rated 5 out of 5 stars

    Great product.

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

    It charges my phone fast and last long I usually use it two times a day because Ive been watching the world cup games on my phone while im at work.

    I would recommend this to a friend
  • Pros mentioned:
    Fast charging, Long lasting

    Rated 5 out of 5 stars

    Amazing Quality and Fast Charge Love it!!

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

    It charges my phone fast and lasts a long I usually use it every day for my phone, AirPods, Nintendo Switch, and iPad. It’s a good portable battery.

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

      So glad you love the product! Thank you for your support. We are super excited to provide something that betters your life. We promise to continue striving to exceed your expectations!

      Remember your device comes with an 18-month warranty, and anytime you need help just let us know.
      Email: support@anker.com
      Phone number: +1 (800) 988 7973 anker