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Customer Ratings & Reviews

$29.99

Customer reviews

Rating 4.7 out of 5 stars with 421 reviews

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Rating by feature

  • Value

    Rating 4.7 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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Cons mentioned filter

92%would recommend to a friend

Customers are saying

Customers often highlight the MAX 20,000mAh power bank's fast charging speed and impressive battery life. Its overall performance and portability are also appreciated by users. However, some customers find the power bank to be heavier and larger than expected.

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 21 Showing 401-420 of 421 reviews
  • Rated 1 out of 5 stars

    Got a bad one.

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

    The unit I purchased was defective and would not power or recharge anything. I’m pretty sure the unit was repackaged. It was missing the USB cable. I returned the unit for a full refund. I was hesitant to try another unit. THE REVIEW APP WILL NOT LET YOU GIVE NO STARS.

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

      Hi LAWRENCED,
      I’m sorry to hear about your experience. Receiving a unit that would not power on, could not charge devices, and was missing the USB cable is understandably frustrating. Thank you for visiting the store to complete the return, and we understand your hesitation about trying another unit after this experience.

  • Cons mentioned:
    Weight

    Rated 2 out of 5 stars

    Not worth it

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

    Way to bulky and heavy not convenient to carry and seems not charge devices after a while

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

      Dear valued customer,
      Thank you for the comment.
      We apologize for the unsatisfactory user experience we have caused you.
      If you have any other questions about the product,
      please feel free to contact us.(service@energizerpowerbanks.com)
      We will be glad to assist you.
      Thank you.

  • Rated 3 out of 5 stars

    Good for the prize

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

    It didn't charge up to 100%. It stopped charging when it reached to 88%.

    I would recommend this to a friend
    • Brand response from Jamal Chen
      Posted .

      We're sorry to hear that your power bank is not charging to 100%. If you're experiencing this issue, we recommend trying a simple calibration cycle. Please completely discharge the power bank until it turns off, then charge it back up to 100%. This can often recalibrate the battery and resolve the issue. If the problem persists after trying this, please visit our support page at https://support.energizerpowerpacks.com/ and fill out the form so we can assist you directly.

      -- Energizer PowerPacks Service Team

  • Rated 1 out of 5 stars

    Bad purchase

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

    Bad, I only used it for a couple of months, I connected it and it turned off, it stopped working

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

      Hi SamaraM,
      We’re sorry to hear about your experience. Please contact us through our support page so we can help you directly:
      https://support.energizerpowerpacks.com/

  • Pros mentioned:
    Charging speed

    Rated 1 out of 5 stars

    Do not recommend this product

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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.

    Do not get , slow charging the same day I returned it and got myself the Anker 20,000mAh charges my iphone in 30 min I think

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

      We apologize for the disappointment caused by the slow charging of our power bank. We're glad you found a suitable alternative.

  • Rated 2 out of 5 stars

    Too heavy!

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

    I took it back. It’s too heavy to take with you on an airplane trip

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

      Hi Georgia,
      Thanks for sharing your feedback. We understand — the MAX 20,000mAh power bank does pack a lot of capacity, and with that comes extra weight. It’s more suited for long days without access to outlets than for lightweight travel. We're sorry it didn’t fit your needs and appreciate you giving it a try.
      --Energizer PowerPacks Service Team

  • Rated 2 out of 5 stars

    do not buy!

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

    takes a LONG time to charge! dies very quickly i can only get 1 charge out of it from 1 phone!

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

      We are very sorry to hear about your experience. While a 20,000mAh power bank can take a long time to fully charge, the fact that you're only getting one phone charge out of it is a clear product defect. This is not the performance you should expect. We want to help resolve this for you. Please visit our support page at https://support.energizerpowerpacks.com/ and fill out the form so we can assist you with a warranty claim.-- Energizer PowerPacks Service Team

  • Rated 1 out of 5 stars

    Portable Battery Charger/Power not recommendable

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

    This Portable Battery Charger/Power not recommendable. I bought it in July, and now in September, it no longer works. It won't charge even with a new cable. For that reason, I don't recommend it, and I can't return it to the store.

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

      Hi Eduardo,
      We’re sorry to hear the unit stopped working just two months after purchase, even with a new cable. That’s understandably frustrating, especially since it’s past the store’s return window.
      Please visit https://support.energizerpowerpacks.com/ so we can assist you with a warranty claim or replacement.
      --Energizer PowerPacks Service Team

  • Rated 1 out of 5 stars

    Energizer

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

    Too long to charge, u can ur phone twice then u have charger it again. Overall it take about 8 hours to charge.

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

      Hi user162189,
      This power bank charges slowly because it only supports 5V/2A input, and for a 20,000mAh battery, an 8‑hour recharge is normal. Getting about two full phone charges can happen due to energy loss and phone battery size. If performance feels unusually low, our support team can help check the unit: https://support.energizerpowerpacks.com/

  • Rated 1 out of 5 stars

    Do not purchase.

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

    I bought this for a trip. It worked well to recharge my phone and Apple Watch, but then I tried to charge the power bank itself, and it would not charged at all. I tried all different cords, outlets, holding the power button, and waiting a couple of days before trying again, but nothing worked. I would not recommend this product.

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

      Dear Juana23,

      We're very sorry to hear that your power bank wouldn't recharge after you used it. It's incredibly frustrating when a product fails, and we appreciate you for trying different cords and outlets to troubleshoot the issue. Since the problem persists, it seems like a product defect. We want to help resolve this for you.

      Please visit our support page at https://support.energizerpowerpacks.com/ and fill out the form so we can assist you with a warranty claim.

      -- Energizer PowerPacks Service Team

  • Rated 1 out of 5 stars

    Trash

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

    Quit charging go after less than 3 months. Not recommended.

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

      Hi Funkyredneck,
      We’re sorry to hear about your experience. Please contact us through our support page so we can help you directly:
      https://support.energizerpowerpacks.com/

  • Rated 2 out of 5 stars

    Subpar at Best

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

    It’s OK for a mid-level charger. It doesn’t hold charge very long.

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

      Dear valued customer,
      Thank you for the comment.
      We apologize for the unsatisfactory user experience we have caused you.
      If you have any other questions about the product,
      please feel free to contact us.(service@energizerpowerbanks.com)
      We will be glad to assist you.
      Thank you.

  • Rated 1 out of 5 stars

    Not Happy

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

    Aloha, Could not even charge one phone up. Nabe a defective unit. 15 day warranty was a joke.

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

      Hi JosephR, we’re sorry to hear about your experience. A power bank should easily charge a phone, so this sounds like a defective unit. Please visit https://support.energizerpowerpacks.com/ so our team can assist with a replacement or further troubleshooting.
      --Energizer PowerPacks Service Team

  • Rated 1 out of 5 stars

    Energizer 20k

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

    Its giving off a burning smell and i can barely ever charge my phone with it. Plan on returning as soon as possible

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

      Dear Customer,

      We take this issue very seriously and apologize for the problem you've experienced. We want to help resolve this for you. Please visit our support page at https://support.energizerpowerpacks.com/ and fill out the form so our team can provide you with support.-- Energizer PowerPacks Service Team

  • Rated 1 out of 5 stars

    Gross and defective

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

    Terrible. Had less than one month and it won’t take a charge now. Even tried other cords. Do not buy

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

      Dear Customer,
      We take this issue very seriously and apologize for the problem you've experienced. We want to help resolve this for you. Please visit our support page at **[https://support.energizerpowerpacks.com/](https://support.energizerpowerpacks.com/)** and fill out the form so our team can provide you with support. -- Energizer PowerPacks Service Team

  • Rated 1 out of 5 stars

    Slow charging

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

    This battery is weak it last long but takes almost 2 hours to halfway charge a iphone 11pro would not reccomend

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

      Hi DaveG,
      Thanks for your feedback, and we're sorry the charging speed didn’t meet your expectations. While this power bank supports 15W output, the iPhone 11 Pro can benefit from higher wattage fast charging, which may explain the slower performance. If you haven’t returned the product yet, please reach out to us via our support page for assistance:
      🔧 https://support.energizerpowerpacks.com/
      --Energizer PowerPacks Service Team

  • Rated 1 out of 5 stars

    Charger doesn’t work

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

    Not great. The chargers that come with these do not charge the device. You get what you pay for I guess.

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

      Dear valued customer,
      Thank you for the comment.
      We apologize for the unsatisfactory user experience we have caused you.
      If you have any other questions about the product,
      please feel free to contact us.(service@energizerpowerbanks.com)
      We will be glad to assist you.
      Thank you.

  • Pros mentioned:
    Portability

    Rated 5 out of 5 stars

    Great little item.

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

    I love that it's portable and I can use my items while I charge them. Simple and easy to use.

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

    Great value battery

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

    The battery charges at a high speed. It is a little bulky but for what it is, it is expected. If you are looking for high capacity battery backup solution for mobile devices, this is what you need!

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

    Rated 5 out of 5 stars

    Great Tech

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

    This came in so handy overseas. I got at least 4 charges on an almost depleted cell phone.

    I would recommend this to a friend