Oregon Scientific Smart Dynamo 2 Help Content & Faq page 6

When the smart core is fully charged, it lasts about 5-7 days. The operation time varies
depend on actual usage.
Indicators Status
Charging
Charging completed
Low battery
Action
Connect the smart core with the
charger pod and link it to USB power
supply.
Remove the smart core from the
charger pod.
Charge the smart core until fully
charged.