Replacement Battery Pack 4.0

You’ve got goals and so do we—like keeping you charged wherever your day takes you. Get continuous data for days on a single charge with our waterproof* battery pack that enables you to charge on the go while you wear it.  To charge your WHOOP® 4.0, simply slide the battery pack on your device to charge on the go. Use the included USB cable to recharge your battery pack from a laptop.  *IP68 dustproof and water-resistant up to 1 meter for 2 hours. WHOOP 4.0 and membership not included. Visit join.whoop.com and sign up for a membership today!