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$19.99

Customer reviews

Rating 4.6 out of 5 stars with 515 reviews

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  • Value

    Rating 4.7 out of 5 stars

  • Quality

    Rating 4.6 out of 5 stars

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    Rating 4.7 out of 5 stars

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91%would recommend to a friend

Customers are saying

Customers express satisfaction with the MAX 10,000mAh power bank's portability, charging speed comparable to wall chargers, and outstanding battery life for its cost. Its overall performance and convenient size are also well-received. The lightweight design, reasonable price, and helpful LCD display contribute to a positive user experience.

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 24 Showing 461-480 of 515 reviews
  • Rated 5 out of 5 stars

    Good purchase

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

    Very useful item especially for emergencies, price is decent

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

    Good power bank

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

    Product worked as advertised. It was used as a supplemental power source for a heated vest.

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

    Replacement power bank

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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 was a replacement power bank for my electric coat and vest

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

    As advertised

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

    Have not used it yet, but it seems as advertised. The battery level indicator is a nice feature.

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

    Nice

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

    Not powerful. But for this price is a good item. Recommend

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

    Happy Recipients

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

    I have these as gifts to son and teen granddaughters. They were very excited to get these.

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

    Charge very slow

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

    I put my s25 on charge and its say 7 hours to full charge

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

      Hi Umesh,
      We’re sorry the charging speed feels so slow. The MAX 10,000mAh power bank supports up to 15W output, but actual charging time depends on the phone’s power draw and cable quality. For faster results, please use the USB-C port with a high-quality cable and a 15W adapter. If the speed remains unusually low, it could indicate a defect—please contact our support team for assistance or a possible replacement:

      --Energizer PowerPacks Service Team

  • Rated 2 out of 5 stars

    Missing Item

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

    This was an open box purchase of which all of its contents would be included. However, the USB cord was missing upon opening the box when I got home.

    I would recommend this to a friend
    • Brand response from Energizer PowerPacks Service Team
      Posted .

      Hi Regular,
      Sorry to hear the USB cord was missing from your open‑box purchase. Since open‑box items should still include all required accessories, the best next step is to contact the original retailer’s customer service so they can assist you with the missing item.

  • Rated 5 out of 5 stars

    Efficient and light

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

    Unexpensive and efficient. Very happy with my purchase

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

    Disappointed

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

    It does not fit my iPhone 13 and thus can not use the charger

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

      We're sorry to hear that the charger doesn't fit your iPhone 13. Please provide the following information to our dedicated email service@tennrich.com

  • Rated 5 out of 5 stars

    Battery backup

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

    Nice to have back up power unit for USB charging. Works well. Would recommend.

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

    Amazing for USB C cabkes

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

    Very great for charging portability for USB-C to lightning cables

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

    Well made and works fine.

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

    Well made and works fine. Would recommend to a friend.

    I would recommend this to a friend
  • Rated 2 out of 5 stars

    Better than nothing

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

    I guess it's better than having nothing in a pinch. Charges extremely slow. Charging one smart phone takes most of the battery. Not sure this size would be good for a tablet or laptop.

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

      Hi SensibleSam,
      Sorry to hear about the slow charging experience. This model is designed for smartphones and smaller devices, so charging a tablet or laptop will be less efficient. For faster charging and better performance with larger devices, you might consider a higher-wattage power bank (20W or above) or one with Power Delivery (PD) support.

  • Rated 5 out of 5 stars

    Good value, light weight, convenient

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

    Light weight, convenient - good for recharging your phone when traveling.

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

    Energizer battery

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

    I wished maybe i would have purchased a faster charger because this slow at charging. This takes way to long. Otherwise ita basic it perfoms adequately.

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

      Thank you for your feedback! We're glad to hear our power bank is performing adequately for your basic needs. We apologize, however, that the charging speed did not meet your expectations. The speed depends heavily on the wall adapter you use to recharge the power bank itself. For the fastest results, we recommend an adapter that supports Power Delivery or Quick Charge 3.0 to reduce the time it takes to get a full charge.

      -- Energizer PowerPacks Service Team

  • Rated 4 out of 5 stars

    Charger

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

    Doesn’t hold a charge for long if not in use. Good to have around

    I would recommend this to a friend
  • Rated 2 out of 5 stars

    A Short Life

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

    This battery pack was purchased in late 12/2024 and hasn't gotten a whole lot of use since then; probably less than 20 charge/discharge cycles. The issue with this is the ability for the discharge to remain active while hooked to a bluetooth speaker via USB-C. The battery constantly turns off and has to be reactivated by changing the port or pressing the ON button. I don't know what is causing this because I'm using it outdoors (open cab delivery truck) and it doesn't feel hot either. In any case, it was a bargain with free shipping and I'll be recycling this one as soon as a possible.

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

      Thank you for sharing your experience. The behavior you’re describing with the UE10035C power bank is likely due to its auto shut-off function, which activates when the output current is too low — a common situation when powering Bluetooth speakers.

      To resolve this, please activate the trickle-charging mode (usually done by double-pressing the power button). This mode is designed to keep the output active for low-power devices like Bluetooth speakers or earbuds.

      If you have any questions or need assistance, feel free to contact us at service@tennrich.com.

  • Rated 3 out of 5 stars

    Doesn’t last very long between charges

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

    If you’re looking for one that will charge a phone several times before it needs to be charged then you may want to look at a larger one. But that being said it does do what it is supposed to do.

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

      Thank you for your feedback! We appreciate your insight. The charging capacity of a power bank depends on its battery size and output efficiency. If you're looking for a model that can charge your phone multiple times before needing a recharge, we recommend considering a higher-capacity power bank, such as our 30,000mAh models.

      We’re glad to hear that the power bank is performing as expected. If you need recommendations for a larger model, feel free to reach out!

      Energizer Power Bank
      Service Team

  • Rated 2 out of 5 stars

    Portable bank power

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

    Dont like it at all issues with changer super slowly different cords changers

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

      Hi JhaerodE,
      Sorry you're having issues with very slow charging and needing different cords. That’s definitely frustrating. The power bank should provide consistent charging, so if it isn’t performing properly, our support team can help troubleshoot or arrange assistance:
      https://support.energizerpowerpacks.com/