How do I charge my WHOOP Battery Pack 4.0?

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.

I just received my WHOOP Battery Pack 4.0, but when I clicked on my WHOOP it wasn't charging.

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.

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Battery Pack 4.0 - Portable, Wearable, Waterproof Charging Components 4.0 Wearable Health, Fitness & Activity Tracker, Not for Gen 5, Onyx

Product ID: 724787613

Details

Battery Capacity
638 Milliamp
Brand
WHOOP
Color
onyx
Connector Type
USB
Special Feature
IP68 dustproof

⚡3.11 Amps fast charging

💧IP68 waterproof & dustproof

🔋638mAh battery capacity

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KD 38.46

Duties & taxes included

In stock

Sold byAmazon KUWAITDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Stay powered, stay ahead — never miss a moment with WHOOP Battery Pack 4.0!

UNSTOPPABLE POWER - Keep your WHOOP 4.0 charged for days without missing a beat.
SAFE SMART CHARGING - Advanced overcharge and short circuit protection for worry-free use.
WEAR CHARGE FREEDOM - Charge your tracker on the go—no downtime, no hassle.
FEATHERLIGHT COMPACT - Sleek, portable design that fits seamlessly into your active lifestyle.
BUILT TO BRAVE ELEMENTS - IP68-rated dustproof and waterproof protection for every adventure.

The WHOOP Battery Pack 4.0 is a compact, lightweight, and durable portable charger designed exclusively for the WHOOP 4.0 fitness tracker. Featuring a 638mAh lithium-ion battery with 3.11 Amps output, it delivers several days of continuous tracking on a single charge. Its IP68 rating ensures dustproof and waterproof protection up to 1 meter for 2 hours, making it perfect for active professionals who demand reliable, on-the-go power with built-in safety features like overcharge and short circuit protection.

Specifications

ASIN	B0BWSFHKGW
Amazon Bestseller	#293,154 in Electronics ( See Top 100 in Electronics ) #690 in Smart Arm & Wristband Accessories
Amperage	3.11 Amps
Battery Capacity	638 Milliamp Hours
Battery Cell Type	Lithium Ion
Battery Weight	9.3 Grams
Brand	WHOOP
Built-In Media	Battery Pack
Cable Length	39.37 インチ
Color	onyx
Compatible Devices	WHOOP 4.0
Compatible Phone Models	WHOOP 4.0
Connector Type	USB
Customer Reviews	4.7 4.7 out of 5 stars (1,020)
Item Dimensions	43 x 35 x 20 mm
Item Type Name	Battery Pack
Manufacturer	WHOOP
Mfr Part Number	974-001-000
Model Name	WHOOP Battery Pack
Model Number	974-001-000
Number of Batteries	1 Lithium Polymer batteries required. (included)
Number of Items	1
Number of Ports	1
Other Special Features of the Product	IP68 dustproof, waterproof up to 1 meter for 2 hours
Portable	Yes
Power Source	Battery Operated
UPC	810114360019
Unit Count	1 Count
Voltage	3.7 Volts

Reviews

K**O

The quality of this product is really good and it performs exactly as expected. It feels well-built, easy to use, and delivers consistent results.

10.01.2026

D**A

It's defective

17.03.2026

J**E

Altijd hand om een extra baterij te hebben

5.05.2025

W**S

It is the factory whoo battery.Came pretty fast and works like it is supposed to.

3.02.2026

C**H

Great replacement battery. Works just like the original.

7.01.2026

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TrustScore 4.5 | 7,300+ reviews

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The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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1 week ago

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