We test every thing from tiny travel models to forty-pound backyard blasters. All of them incorporate rechargeable batteries for portability. Carry Documentation: Carry the documentation for your Bluetooth speaker, like its specifications and battery potential. This may be useful if airport security needs clarification about the device. You will https://www.bluetoothspeaker.top/bluetooth-speaker-wireless-sound-box-with-subwoofer-aluminum-alloy-housing-customizable-speaker/