Fitbit Alta Battery Replacement - iFixit Repair Guide
Battery Replacement for Fitbit ALTA Activity Tracker Smart Fitness Watch Fb406 for sale online | eBay
Fitbit Flex Failure and Teardown - YouTube
Insten Usb Charger Compatible With Fitbit Flex 2 Wireless Activity And Fitness Tracker Wristband, With 10-inch Cable, Not Compatible With Flex, Black : Target
Teardown: Fitbit Flex doesn't easily give up its secrets - EDN