Last-Minute SavingsLimited quantities.Shop now

Skip to content
Gift Ideas
Main Content

Customer Ratings & Reviews

No content
  • Front. Insignia™ - 20,000 mAh Portable Charger for Most USB-Enabled Devices.
  • Alt View 1. Insignia™ - 20,000 mAh Portable Charger for Most USB-Enabled Devices.
  • Alt View 11. Insignia™ - 20,000 mAh Portable Charger for Most USB-Enabled Devices.
  • Alt View 12. Insignia™ - 20,000 mAh Portable Charger for Most USB-Enabled Devices.
  • Alt View 13. Insignia™ - 20,000 mAh Portable Charger for Most USB-Enabled Devices.
  • Alt View 14. Insignia™ - 20,000 mAh Portable Charger for Most USB-Enabled Devices.
  • Alt View 15. Insignia™ - 20,000 mAh Portable Charger for Most USB-Enabled Devices.
  • Alt View 16. Insignia™ - 20,000 mAh Portable Charger for Most USB-Enabled Devices.
  • Product Feature: Insignia 20,000 mAh Portable Charger video 0 minutes 50 seconds

Insignia™ - 20,000 mAh Portable Charger for Most USB-Enabled Devices - Black

Model:
NS-MB20K
SKU:
6362533
Highly rated by customers for:
Your price for this item is $38.99
Clearance
The comparable value price is $44.99

Customer reviews

Rating 4.6 out of 5 stars with 483 reviews

Rating Filter

Rating by feature

  • Value

    Rating 4.6 out of 5 stars

  • Quality

    Rating 4.6 out of 5 stars

  • Ease of Use

    Rating 4.7 out of 5 stars

Pros mentioned filter

Cons mentioned filter

93%would recommend to a friend

Customers are saying

Customers regard the 20,000 mAh Portable Charger favorably due to its impressive battery life and ease of use, finding it particularly convenient for travel. Many appreciate its value for the price and large capacity, although some find it somewhat bulky and heavy. The charger's compatibility with multiple devices is also a plus for many users.

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 16 Showing 301-320 of 483 reviews
  • Pros mentioned:
    Ease of use

    Great product for the price

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

    Great product for for price. Easy to use & instructions where easy to follow. I would recommend to others

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

    Works

    |
    |
    Posted . Owned for 6 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Works as advertised. Charges quickly and gets charged fairly quickly.

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

    Oldie but a goodie

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

    Old model but still gets the job done. Chargest decently fast.

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

    Power

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

    Couldn’t miss any movies and calls with it, good power backup.

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

    Good battery bank.

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

    Charges my phone several times before the battery itself needs a re-charge.

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

    great battery

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

    Great battery. Just what I needed. Holds a charge for a long time.

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

    great

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

    love this I can get about 4x charges with one charge . great for my flights

    I would recommend this to a friend

  • Great product!

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

    Quick to charge multiple items with one charge! Great for vacation!

    I would recommend this to a friend
  • Pros mentioned:
    Ease of use

    Great charger.

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

    Works as advertised. Easy to use and recharge. Highly recommend it.

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

    Battery rescuer

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

    Another road trip buddy. You'll never run out of battery.

    I would recommend this to a friend
  • Cons mentioned:
    Size

    Average

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

    Lovely design and good quality, although I wish it wasn’t as heavy and big.

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

    Great buy !!!

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

    Works perfect when I work late hours needed my devices charge up .

    I would recommend this to a friend

  • Nice

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

    Excellent.. power always at my fingertips for my iPhone!!

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

    Review

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

    Excellent product with multiple use options and long lasting before charge is needed

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

    Ready for hurricane season

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

    Quick charging, will be useful during power outages in the home.

    I would recommend this to a friend

  • Best portable charger

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

    This device is amazing!!! It works so well and I’m extremely pleased

    I would recommend this to a friend
  • Cons mentioned:
    Size

    Decent Charger for your first portable purchase

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

    This is ok, I wish it had more information and was a little smaller, but it gets the job done.

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

    Value for money

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

    Value for money great product Will reccomend this for everyone. Thanks

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

    Works great

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

    Charges good and lasts for a long time and works as I had expected

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

    Awesome backup charger for traveling

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

    Gets the job done, charges my phone sufficiently when I need a backup

    I would recommend this to a friend
Page 16, Showing 301-320 of 483 reviews
Sign in or Create Account

Get the latest deals and more.

Best Buy appLearn more
Share on YouTubeShare on InstagramShare on TikTokShare on FacebookShare on PinterestShare on X
Best Buy Canada
AccessibilityTerms & ConditionsPrivacyInterest-Based AdsState Privacy RightsHealth Data PrivacyDo Not Sell/Share My Personal InformationLimit Use of My Sensitive Personal InformationTargeted Advertising Opt OutCA Supply Chain Transparency Act
In-store pricing may vary. Prices and offers are subject to change. © 2025 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.