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? Can I use my portable sound machine (Rohm, Hushh,or Go) while it's plugged in and charging? What do the green and amber lights on the Soundcenter indicate? What does the "ding" sound mean? How do I turn the sound on for my Travel Mini?