Note: Analog tuners are very sensitive to adjustments small movements are necessary to tune
The Dynamo hand crank charges the internal rechargeable battery circuit should dry cell batteries not be available or are depleted.
If you cranked the dynamo the recommended 6 revolutions the radio should last 5-8 mins at a moderate volume. The dynamo is for emergency purposes only, and batteries are recommended for extended periods.
No, the dynamo will only recharge the internal rechargeable battery circuit of this device and will not impact the batteries installed into the battery compartment.