300 Pre-sale benefits
Prime Day: June 23–26 · Starts 12:01 AM PT

Prime Day Sale

Buy 1, Get 1 FREE

U.S. Only: Buy any color 10,000mAh Built-in Cable Power Bank and get a FREE Purple Edition.

Prime Day: June 23–26 · Starts 12:01 AM PT

How It Works

Don’t Miss Your FREE Purple Unit.

Step 1 email sign-up icon

Steps 1

Enter your email to sign up.

Step 2 discount code icon

Steps 2

Get the Prime Day code by email around 11:00 PM PT on June 22, about 1 hour before the sale starts.

Step 3 free unit checkout icon

Steps 3

Use it at Prime Day launch and unlock your FREE unit on Amazon.

* Simple. Fast. Limited.

Why Charmast Built-in Cable Power Bank?

Built-in 4 Cables
Charmast power bank with four built-in cables
Charge up to 6 Devices
Charmast power bank charging multiple devices
10,000mAh Slim Design
Charmast 10000mAh slim portable charger
LED Battery Display
Charmast portable charger LED battery display

*Now get TWO for the price of ONE.

Prime Day Picks

Find Your Favorites

Charmast 10000mAh Built-in Cables | Ultra Slim | LED Display Power Bank

Charmast 10000mAh Built-in Cables | Ultra Slim | LED Display Power Bank

$30.99
Canada Buy on Amazon
Charmast 10000mAh Built-in Cables | Ultra Slim | LED Display Power Bank

Charmast 10000mAh Built-in Cables | Ultra Slim | LED Display Power Bank

$30.99
United States Buy on Amazon
Charmast 20000mAh Power Bank with Built-in Cables | USB C Battery Pack

Charmast 20000mAh Power Bank with Built-in Cables | USB C Battery Pack

$41.99
United States Buy on Amazon
Charmast 20000mAh Power Bank with Built-in Cables | USB C Battery Pack

Charmast 20000mAh Power Bank with Built-in Cables | USB C Battery Pack

$41.99
United States Buy on Amazon
FAQ

Frequently Asked Questions

Everything you need to know about the Charmast Prime Day Buy One, Get One Free offer.

How does the Buy One, Get One Free promotion work?

Purchase one 10,000mAh Built-in Cables Power Bank in White, Sky Blue, Red, Matcha Green, or Dust Pink from our Amazon Product Page during the Amazon Prime Day promotion period using the exclusive promotion code, and receive one Purple Edition power bank for free.

The Purple Edition is not available for individual purchase and is only offered as a free gift during this promotion.

Is the Buy One, Get One Free promotion available worldwide?

No. The Buy One, Get One Free promotion is available only through the Amazon US store.

Prime Day discounts may also be available in other Amazon marketplaces, but prices and promotions vary by country. Please check your local Amazon store for the latest offers.

Why can’t I see the Purple Edition or the Buy One, Get One Free offer on Amazon?

The Purple Edition is not available for direct purchase on Amazon, and the Buy One, Get One Free promotion will not be publicly displayed on the Amazon product page.

This is a newsletter-exclusive promotion. Eligible customers will receive the promotion code and redemption instructions by email before the Amazon Prime Day event begins.

How do I get the promotion code?

Simply subscribe to our newsletter. We will email the exclusive promotion code and step-by-step instructions approximately one hour before the Amazon Prime Day event begins.

Amazon Prime Day starts at 12:01 AM Pacific Time on June 23 and runs through June 26. Subscribers can expect to receive the promotion email at approximately 11:00 PM Pacific Time on June 22.

Is the promotion limited?

Yes. The promotion is limited to the first 300 qualifying orders only, while supplies last. However, the promotion code is limited to one use per Amazon account.

Does adding the product to my cart guarantee the offer?

No. Adding the product to your cart or wishlist does not guarantee the offer. The promotion is available only to the first 300 qualifying orders that successfully use the exclusive promotion code.

Tip: Subscribe early and check your inbox before Prime Day. The offer is first come, first served.