How long for fitbit alta hr to charge

Fitbit Charge 2 Wristband Charging Cable for HR/One/Force/Surge/Blaze/Alta

USB Charging Cable for Fitbit Charge 6/ 5/ 4/ 3/ 2 Charger for Fitbit Inspire 3 2 Ace3 2 LTE Alta HR Alta Versa 4 3 2 Sense 2

55cm Replacement USB Charging Cable Cord for Fitbit Alta HR

Fitbit Alta HR Charger - EURO MEGA - USB Cable Adapter - Power and Charging for Fitbit Alta HR