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? What do the flashing LED lights on the Travelcube sound machine mean? 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? If the battery on a Travelcube is completely "dead", how long will it take to be recharged?