How long can a Travelcube be operated after being fully charged? March 31, 2025 15:15 Updated A fully-charged Travelcube sound machine should be usable for at least eight full hours. Related articles How long does the Travel Mini battery take to fully recharge? 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? What do the flashing LED lights on the Travelcube sound machine mean? How do I charge my Hushh, Rohm, or Travel Mini?