Restart > clean connections > use a different charger > replace the cable > bring the phone closer. Check Bluetooth connection > disconnect other Bluetooth devices > restart Fitbit app > check for ...
Small electronic devices like your Fitbit Alta HR rely solely on its battery to power it up and while Fitbit did a good job in making their devices efficient enough, you would still need to charge ...
Fixes for drained battery, update issues, dirt, weak connections, and more Restart > clean connections > use a different charger > replace the cable > bring the phone closer. Check Bluetooth ...