TECHGEAR Replacement USB Charger Cable Compatible with Fitbit Charge 4, Fitbit Charge 3, USB Charging Power Cable Compatible with both Fitbit Charge 4 & Charge 3, Health & Fitness Tracker Wristband: Amazon.co.uk:
Insten compatible with Fitbit Flex 2 - Replacement USB Charging Cable Cord Cradle Dock Charger Adapter Fitness Wristband - Walmart.com
Fitbit Flex 2 Parts | Fitbit Flex 2 Replacement Spares