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 What do the flashing LED lights on the Travelcube sound machine mean? Can I use my portable sound machine while it’s plugged in and charging? My Hushh/Rohm/Travel Mini/Pocket Baby Soother will not turn on/off, and I have already made sure that the child lock is deactivated. How can I fix this? How long does the Travel Mini battery take to fully recharge? How long will the battery last on the Travel Mini Sound Machine?