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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 7 Showing 121-140 of 1,403 reviews
  • Pros mentioned:
    Portability, Size

    Rated 5 out of 5 stars

    works as advertised

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

    Slim but still has plenty of charge, great for traveling

    I would recommend this to a friend
  • Pros mentioned:
    Battery life, Usb-c

    Rated 5 out of 5 stars

    Omg

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

    I got this on a huge sale price. This is a powerhouse of a bank. It has PD vis type C and two type A connections for the option to charge 3 devices at once. And last for days. Incan even charge my Macbook 16’ M1 Pro with it. Haha i love this product.

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

    Rated 5 out of 5 stars

    Great long lasting battery

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

    Great long lasting battery. Nice slim design. Fast charging.

    I would recommend this to a friend
  • Pros mentioned:
    Charging speed, Usb-c

    Rated 5 out of 5 stars

    Great charger for multiple devices

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

    Love that this has 2 A ports plus a C so I can charge both my older iphone and my newer iPad. Have only tried it a few times since purchasing but it works great, charges faster than the chargers that came with my 2 devices.

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

    Rated 5 out of 5 stars

    Honestly surprised me!

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

    Has lasted me for HOURS with a full charge every single time. On average, I’d say I’d use it while I’m studying in public around 3-5 hours a day and I find myself needing to charging it every 2-3 days. Not that common, but on days where I needed to use it all day (ex Disneyland), it’s always lasted me throughout and had never died on me. I can’t speak for others, but I’m a HUGE fan and this has saved me so much hassle. The main issue, which isn’t even too much of a problem, is that I find that I need to charge it for long periods for ur to be a full battery. An inconvenience when I realize it was running low, but honestly not that big of an issue since I just plug when I’m sleeping and it’s fully charged and ready when I wake up.

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

    Rated 5 out of 5 stars

    Good bang for the buck

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

    Durable, easy to use, holds quite a bit of charges. This is something you definitely want to have. It is larger than a single use but you'll be able to charge several different devices.

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

    Rated 5 out of 5 stars

    Just what you expect

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

    It’s our third power bank by this manufacturer we bought here. They all just work as they are supposed to! We had to return one from Energizer as it broke immediately, but those tree work with no flaws.

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

    Rated 5 out of 5 stars

    Battery to the 2nd power

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

    Holy battery power Batman! Took this in a 5 week trip to Japan charged my phone and Apple Watch super fast. Held tons of reserve energy and just recently used it during a black out. 10/10. Charges quick as well

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

    Rated 5 out of 5 stars

    Anker Power Core III saves the day Portable chgr

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

    Great for a 12 hour trip when you want to keep using your devices for weather, games, calls, keeping up with hotels, relatives, etc. No need to be trying to find a safe source of powering up as it is in your possession. It was nice to have this especially on a long walk when power sources are far between.

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

    Rated 5 out of 5 stars

    Charge anywhere

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

    Literally anywhere. I plug my phone into this and trow it into my back pocket. Chargest my iphone 15 pro like 4 times. Its also very fast at charging. Probably more than most people even need.

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

    Rated 5 out of 5 stars

    Practical to carry.

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

    It is practical to carry when you travel and the hours of charging for your cell phone are enough in an emergency.

    I would recommend this to a friend
  • Pros mentioned:
    Battery life, Usb-c

    Rated 5 out of 5 stars

    Fantastic USB-C charger

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

    I was looking for a USB type C charger since all chargers are now trending this way. It is both an input and output source and also comes with two USB type A ports. Charges quickly and comes with a useful battery life indicator. Highly recommend!

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

    Rated 5 out of 5 stars

    Anker never lets me down

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

    Anker has never let me down when it comes to chargers, I've had this for a while now and it still holds enough charge to fully charge my phone 5 times before needing to charge again.

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

    Rated 5 out of 5 stars

    Perfect for travel

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    Posted . Owned for 5 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Have used it on my trips to NYC and Japan to charge my phone and camera batteries. This thing is great and would definitely recommend it.

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

    Rated 4 out of 5 stars

    Charger

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

    Held the charge well, good size and was easy to use. Would be nice if it came w the cables

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

    Rated 5 out of 5 stars

    The portable battery is great.

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

    Excellent product, I recommend it 100% I'm happy to have bought it., I can go on my scooter carrying it perfectly,. I deliver food, and before it was impossible to work continuously.

    I would recommend this to a friend
  • Pros mentioned:
    Portability, Size

    Rated 5 out of 5 stars

    Great and portable!

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

    This is my second purchase of this product; I have had mine for over 3 years and use it so much I wanted my husband to have one as well. It’s great when you’re on the go or traveling with limited access to charging ports. The size is similar to a cellphone so it’s easy to carry in a purse, backpack or briefcase.

    I would recommend this to a friend
  • Pros mentioned:
    Battery life, Usb-c

    Rated 5 out of 5 stars

    Phone charger for I phone 13

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

    Rhis is a great charging block. With the new charging changes on all smartphones. This block works on the I phone 13. My other would not charge the phone. I get 3 full charges. Sad the phone makers force you to use a different phone charger and a different block that you have to buy seperate.

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

    Rated 5 out of 5 stars

    Amazing battery banks!!

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

    I will always buy Anker products when it comes to battery banks. They are sturdy and last a very long time. This is my second battery bank of theirs and my original is still working like new.

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

    Rated 5 out of 5 stars

    Good for a family when on trip

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    Posted . Owned for 5 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Very happy with this purchase. Took it on a family day trip and it kept 4 phones charged during the day when we had no place to recharge. Takes a long time to fully charge when it is very low but since it has a large capacity it is not surprising.

    I would recommend this to a friend