![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_UF1000,1000_QL80_.jpg)
Amazon.com: WHOOP Battery Pack 4.0 – Portable, Wearable, Water-Resistant Charging Component 4.0 Wearable Health, Fitness & Activity Tracker : Electronics
![Mark Rizzo on Twitter: "The winning mentality of @whoop is clear. @willahmed & team aren't afraid to make it known either. Check out the inside of the 4.0 Battery Pack…🔥 https://t.co/VpuNFuR0iW" / Mark Rizzo on Twitter: "The winning mentality of @whoop is clear. @willahmed & team aren't afraid to make it known either. Check out the inside of the 4.0 Battery Pack…🔥 https://t.co/VpuNFuR0iW" /](https://pbs.twimg.com/media/E_avoadWYAA5lN3.jpg)
Mark Rizzo on Twitter: "The winning mentality of @whoop is clear. @willahmed & team aren't afraid to make it known either. Check out the inside of the 4.0 Battery Pack…🔥 https://t.co/VpuNFuR0iW" /
![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://images-na.ssl-images-amazon.com/images/I/71CQ6esBqFL._AC_UL750_SR750,750_.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/A1o2lgIZtsL._SY350_PKmb-play-button-overlay_.jpg)