3mk Endurance Powerbank til Apple Watch 49 mm 2,5W 1200mAh USB-C - sort3mk Endurance With energy in constant motion! Small size and ability to charge while wearing Strong magnet for wireless charging Up to 15 hours on a single charge Power bank and charger function Raised edges to protect the screen Completely safe 10 security systems Guaranteed uninterrupted measurements A low battery Apple Watch means you lose your workout data. It stops tracking your steps during daily activity. It doesn't track your sleep quality at