Whoop Band 4.0 - new firmware for the battery pack
WHOOP 4.0 fitness band review - Tracks your sleep and recovery - The Gadgeteer
Can You Charge Whoop Without Battery Pack? (Solved!)
How to Charge Your WHOOP 4.0 - YouTube
WHOOP 4.0 fitness band review - Tracks your sleep and recovery - The Gadgeteer
WHOOP strap isn't charging? Tips to fix it - MyHealthyApple
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
Charging Your WHOOP - YouTube
Hands-On WHOOP 4.0 Review: The Best Fitness & Sleep Tracker