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 How long will the battery last on the Travel Mini Sound Machine? How do I charge my Hushh, Rohm, or Go? What do the flashing LED lights on the Travelcube sound machine mean? Can I use my portable sound machine (Rohm, Hushh,or Go) while it's plugged in and charging? How do I turn the sound on for my Travel Mini?