If the battery on a Travelcube is completely "dead", how long will it take to be recharged? September 30, 2020 14:39 Updated If the battery is fully depleted, the Travelcube will require between 3 1/2 to 4 hours to reach full charge. Related articles How long will the battery last on the Travel Mini Sound Machine? How long does the Travel Mini battery take to fully recharge? Can I use a timer smart plug with my sound machine? Can I use my sound machine in the nursery? What is the battery life of Hushh, Rohm, or Go?