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WHOOP

WHOOP Battery Pack 4.0 – Portable, Wearable, Water-Resistant Charging Component 4.0 Wearable Health, Fitness & Activity Tracker, Onyx

  • Based on 224 reviews
Condition: New
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$49.00 Why this price?

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  • – 6-month term
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Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

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This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Oct 16
Order within 23 hours and 44 minutes
Available payment plans shown during checkout

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Features

  • FSA/HSA: WHOOP is FSA/HSA eligible! As a certified retailer, you can purchase your WHOOP 4.0 Battery Pack directly with your FSA/HSA card at checkout.
  • LONG-LASTING POWER Get continuous data for days on a single charge with our battery pack that enables you to charge on-the-go while you wear it.
  • DURABLE & WATER RESISTANT Designed to provide long-lasting power for years to come. P68 dust-proof and water-resistant up to 1 meter for 2 hours.
  • COMPACT & PORTABLE Compact and lightweight, making it easy to carry with you wherever you go. Whether you're traveling, working out, or simply need to extend your WHOOP tracker's battery life, this battery pack is the perfect solution.
  • EASY TO USE To charge your WHOOP 4.0 Health and Fitness Tracker, simply slide the battery pack on your device for charging on-the-go. Use the included USB cable to recharge your battery pack from a laptop.
  • SAFE & RELIABLE Built with safety in mind, our WHOOP 4.0 Battery Pack features overcharge and short-circuit protection to ensure that your WHOOP tracker is always protected.
  • EASY SETUP: Quickly and easily charge your WHOOP Battery Pack 4.0 every time before charging your WHOOP device. Plug the battery pack into a power source using the provided USB-C cord. The LED light will stay red until it reaches fully charged, and will turn green.

Brand: WHOOP


Connectivity Technology: Wireless, USB


Connector Type: USB


Compatible Devices: Smartwatches


Included Components: Battery Pack


Cable Length: 39.37 Inches


Special Feature: IP68 dust-proof and water-resistant up to 1 meter for 2 hours.


Color: Onyx


Input Voltage: 3.85 Volts


Total USB Ports: 1


Product Dimensions: 1.7 x 1.4 x 0.8 inches


Item Weight: 2.11 ounces


Item model number: 974-001-000


Batteries: 1 Lithium Polymer batteries required. (included)


Date First Available: March 14, 2023


Manufacturer: WHOOP


Country of Origin: Mexico


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Oct 16

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Works well
Color: Onyx
Simple to use
Reviewed in the United States on February 2, 2024 by Michael Kenny
    • Love my Woop
Color: Onyx
Misplaced my woo battery. 🪫. So easy to use and filled my need.
Reviewed in the United States on January 17, 2024 by C. Connolly
    • Just as good as the one that came with my WHOOP
Color: Onyx
My husband and I both have WHOOP bands and he’s always losing his in the house. I bought an extra one so that we always have one ready to go. It was nice to get it from Amazon too. Much faster shipping than directly from WHOOP.
Reviewed in the United States on December 18, 2023 by Alexandra Williamson
    • So convenient to be able to order on Amazon!
Color: Onyx
I was traveling and forgot my charger - was able to order with the option to deliver to an Amazon locker in a local store. This is something for other small brands to consider as far as the convenience of ordering / having items delivered. Consistent Whoop quality / happy to not lose my data whilst traveling. ... show more
Reviewed in the United States on November 26, 2023 by Corinne Cook
    • Genuine Whoop Product
Color: Onyx
Genuine whoop charger. Works as advertised and ships faster than buying from Whoop.
Reviewed in the United States on December 5, 2023 by David
    • Works well!
Color: Onyx
This thing charges the product as promised! Buy!
Reviewed in the United States on November 26, 2023 by William Hughes
    • Quality.
Color: Onyx
I love the whoop 4.0 battery but as any whoop user knows, they’re so easy to lose. You always need an extra just in case. Say it misplace the current battery you have now, start the countdown to losing your streak on whoop. Pros: light weight, inconspicuous, durable Cons: easy to lose if you’re unorganized ... show more
Reviewed in the United States on October 25, 2023 by Matthew Siemaszkiewicz
    • A WHOOP Necessity!
Color: Onyx
The WHOOP Battery Pack 4.0 has proven to be a valuable accessory for my WHOOP fitness tracker, providing a convenient solution for charging on the go. Its portability is a standout feature, allowing me to easily carry it in my pocket or bag. The compact size ensures that it doesn't add unnecessary bulk to my belongings, making it an ideal companion for travel, outdoor activities, or simply when I'm away from a power source for an extended period. Mounting the Battery Pack on the WHOOP fitness tracker is a breeze. The magnetic attachment system ensures a secure connection, and the alignment is straightforward. The tracker locks into place effortlessly, and I can confidently wear it while the Battery Pack charges. The convenience of this design allows me to continue tracking my data seamlessly without interruption. However, one downside I encountered was the ease of losing the Battery Pack. Unfortunately, I misplaced the original one that came with my WHOOP fitness tracker, and had to purchase another separately. The small size makes it susceptible to getting misplaced or easily overlooked. It would be helpful if WHOOP could consider implementing some form of attachment or storage mechanism to mitigate the risk of losing the Battery Pack. Additionally, while the functionality and convenience of the Battery Pack are impressive, the price of WHOOP accessories can be a deterrent. The cost of replacing the Battery Pack or purchasing additional WHOOP accessories can add up quickly. It would be beneficial if WHOOP offered more affordable pricing options for their accessories to make them more accessible to a broader range of users. ... show more
Reviewed in the United States on June 20, 2023 by Ryan Reviews Things!

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