![Amazon.com: WHOOP Battery Pack 4.0 – Portable, Wearable, Water-Resistant Charging Component 4.0 Wearable Health, Fitness & Activity Tracker : Electronics Amazon.com: WHOOP Battery Pack 4.0 – Portable, Wearable, Water-Resistant Charging Component 4.0 Wearable Health, Fitness & Activity Tracker : Electronics](https://m.media-amazon.com/images/I/41XDrk9P0dL._AC_UF894,1000_QL80_.jpg)
Amazon.com: WHOOP Battery Pack 4.0 – Portable, Wearable, Water-Resistant Charging Component 4.0 Wearable Health, Fitness & Activity Tracker : Electronics
![Amazon.com: WHOOP Battery Pack 4.0 – Portable, Wearable, Water-Resistant Charging Component 4.0 Wearable Health, Fitness & Activity Tracker : Electronics Amazon.com: WHOOP Battery Pack 4.0 – Portable, Wearable, Water-Resistant Charging Component 4.0 Wearable Health, Fitness & Activity Tracker : Electronics](https://m.media-amazon.com/images/I/41XDrk9P0dL.jpg)
Amazon.com: WHOOP Battery Pack 4.0 – Portable, Wearable, Water-Resistant Charging Component 4.0 Wearable Health, Fitness & Activity Tracker : Electronics
![Whoop review: can a wrist strap without a screen really make you fitter, healthier and faster? We put it to the test | Cycling Weekly Whoop review: can a wrist strap without a screen really make you fitter, healthier and faster? We put it to the test | Cycling Weekly](https://cdn.mos.cms.futurecdn.net/U3myauez7gS8FqNExiLDFi.jpg)
Whoop review: can a wrist strap without a screen really make you fitter, healthier and faster? We put it to the test | Cycling Weekly
![Whoop 4.0 scratched from charger after just two charge cycles. Support left me with the dreaded “the hardware team will get in touch with you”. Haven't heard back for days. : r/whoop Whoop 4.0 scratched from charger after just two charge cycles. Support left me with the dreaded “the hardware team will get in touch with you”. Haven't heard back for days. : r/whoop](https://i.redd.it/3t91kpagr1z71.jpg)