If the DB-30 tempo resets to 120 BPM, or the unit turns off shortly after powering on, the battery is likely depleted.
- Remove the screw from the battery cover.
- Slide off the cover to expose the battery compartment.
- Remove the old battery.
- Insert a new CR2032 lithium battery, making sure the "+" side faces up.
- Close the battery cover and fasten the screw.
Note: The DB-30 uses a CR2032 lithium battery. Other battery types are not supported.