---
product_id: 538521887
title: "Battery Pack 4.0 – Portable, Wearable, Water-Resistant Charging Component 4.0 Wearable Health, Fitness & Activity Tracker, Onyx"
brand: "whoop"
price: "$232"
currency: NZD
in_stock: true
reviews_count: 5
category: "Whoop"
url: https://www.desertcart.nz/products/538521887-battery-pack-4-0-portable-wearable-water-resistant-charging-component
store_origin: NZ
region: New Zealand
---

# 2.4A fast output current IP68 water & dust resistant 638mAh battery capacity Battery Pack 4.0 – Portable, Wearable, Water-Resistant Charging Component 4.0 Wearable Health, Fitness & Activity Tracker, Onyx

**Brand:** whoop
**Price:** $232
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your performance, rain or shine.

## Quick Answers

- **What is this?** Battery Pack 4.0 – Portable, Wearable, Water-Resistant Charging Component 4.0 Wearable Health, Fitness & Activity Tracker, Onyx by whoop
- **How much does it cost?** $232 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/538521887-battery-pack-4-0-portable-wearable-water-resistant-charging-component)

## Best For

- whoop enthusiasts

## Why This Product

- Trusted whoop brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safe Charging, Always:** Advanced overcharge and short-circuit protection keeps your WHOOP tracker secure and reliable.
- • **Plug, Slide & Power Up:** Effortless charging with a simple slide-on design and included USB cable for quick recharge.
- • **Built to Brave the Elements:** IP68-rated water and dust resistance means your battery pack works as hard as you do.
- • **Unstoppable Power On-The-Go:** Keep your WHOOP 4.0 charged for days without missing a beat.
- • **Featherlight & Ultra-Compact:** Sleek design fits seamlessly into your active lifestyle—charge anywhere, anytime.

## Overview

The WHOOP Battery Pack 4.0 is a compact, lightweight, and water-resistant charging solution designed exclusively for the WHOOP 4.0 fitness tracker. Featuring a 638mAh lithium-ion battery, it delivers fast 2.4A output current and offers IP68 dust and water resistance up to 1 meter for 2 hours. With easy slide-on charging and built-in safety protections, it ensures continuous health and activity tracking without interruption—perfect for the busy, health-conscious professional.

## Description

Get continuous data for days on a single charge with our waterproof battery pack that’s designed to charge your WHOOP while you’re wearing it. WHOOP 4.0 and membership not included. Purchase your WHOOP 4.0 and membership separately. WHOOP 4.0 is IP68 dustproof and water-resistant up to 10 meters for 2 hours. WHOOP 4.0 Battery Pack is IP68 dustproof and water-resistant up to 1 meter for 2 hours.

Review: ممتاز - ممتاز
Review: Great product - I lost my charger and got the whoop charger literally the next day Great service

## Features

- 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.
- Unit Count: 1.0
- Mounting Type: Tabletop Mount

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BWSFHKGW |
| Amperage | 3.11 Amps |
| Antenna Location | laptop |
| Battery Capacity | 638 Milliamp Hours |
| Battery Cell Type | Lithium Ion |
| Battery Charge Time | 2 Hours |
| Battery Weight | 9.3 Grams |
| Battery capacity | 638 Milliamp Hours |
| Best Sellers Rank | #1,135 in Sporting Goods ( See Top 100 in Sporting Goods ) #3 in Fitness Technology |
| Brand | WHOOP |
| Built-In Media | USB Cable |
| Cable Length | 39.37 Inches |
| Color | Onyx |
| Colour | Onyx |
| Compatible Devices | WHOOP 4.0 |
| Compatible Phone Models | WHOOP 4.0 |
| Connector Type | USB |
| Connector type | USB |
| Customer Reviews | 4.7 out of 5 stars 1,032 Reviews |
| Item Dimensions | 43 x 35 x 20 millimeters |
| Item Type Name | Battery Pack |
| Manufacturer | WHOOP |
| Model Name | WHOOP Battery Pack |
| Model Number | 974-001-000 |
| Number of Batteries | 1 Lithium Polymer batteries required. (included) |
| Number of Ports | 1 |
| Other Special Features of the Product | IP68 dust-proof and water-resistant up to 1 meter for 2 hours. |
| Output Current | 2.4 Amps |
| Portable | Yes |
| Power Source | Battery Powered |
| Special features | IP68 dust-proof and water-resistant up to 1 meter for 2 hours. |
| UPC | 810114360019 |
| Unit Count | 1.0 Count |
| Voltage | 3.7 Volts |

## Product Details

- **Battery capacity:** 638 Milliamp Hours
- **Brand:** WHOOP
- **Colour:** Onyx
- **Connector type:** USB
- **Special features:** IP68 dust-proof and water-resistant up to 1 meter for 2 hours.

## Images

![Battery Pack 4.0 – Portable, Wearable, Water-Resistant Charging Component 4.0 Wearable Health, Fitness & Activity Tracker, Onyx - Image 1](https://m.media-amazon.com/images/I/41XDrk9P0dL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: How do I charge my WHOOP Battery Pack 4.0?**
A: Plug your battery pack 4.0 into a power source using your WHOOP-provided USB-C cord. While charging, the LED will stay red. Once your battery pack is fully charged, the LED will turn green.

**Q: I just received my WHOOP Battery Pack 4.0, but when I clicked on my WHOOP it wasn't charging.**
A: Make sure you charge your WHOOP Battery Pack 4.0 before trying to charge your WHOOP. See above FAQ on how to charge your WHOOP Battery Pack 4.0.

## Customer Reviews

### ⭐⭐⭐⭐⭐ ممتاز
*by H***N on 31 March 2025*

ممتاز

### ⭐⭐⭐⭐⭐ Great product
*by P***E on 10 September 2024*

I lost my charger and got the whoop charger literally the next day Great service

### ⭐ Broke After One Month, and No Return Option?
*by M***R on 13 April 2025*

I bought this WHOOP Battery Pack 4.0 and expected it to last at least a few months, but it completely stopped working after just one month. This is beyond frustrating, especially considering the return window is already closed. Am I supposed to buy a new battery every month now? This kind of quality is unacceptable, especially for a brand like WHOOP. It’s clear there’s either a major flaw in the product or zero durability built in. I don’t recommend this to anyone unless you’re ready to keep throwing money down the drain.

## Frequently Bought Together

- WHOOP Battery Pack 4.0 – Portable, Wearable, Water-Resistant Charging Component 4.0 Wearable Health, Fitness & Activity Tracker, Onyx
- DADO Comfort Durable Silicone Wristband Compatible with WHOOP 4.0 Band, Soft Silicone Sports Loop Strap for Men & Women, with U Shapped Connector

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.nz/products/538521887-battery-pack-4-0-portable-wearable-water-resistant-charging-component](https://www.desertcart.nz/products/538521887-battery-pack-4-0-portable-wearable-water-resistant-charging-component)

---

*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-15*