How long does the Travel Mini battery take to fully recharge? September 16, 2020 21:12 If the battery is fully depleted, the Travel Mini will require between 3 1/2 - 4 hours to be fully charged again. Related articles What do the flashing LED lights on the Travelcube sound machine mean? How long can a Travelcube be operated after being fully charged? What do the indicator lights mean on the Duet Sound Machine? How long will the battery last on the Travel Mini Sound Machine? Travel Mini Product and Sounds Overview