It’s possible the Braven BRV-X/2 Small Rugged Speaker can last longer than you can on outdoor adventures. With up to 18 hours of solid battery life, this small waterproof speaker can handle a day or two of hardcore adventuring. Take it with you the next time you go on the water because this Bluetooth waterproof speaker is rated IPX7. So it can handle falling in and getting a little wet. Furthermore, it can actually float, so you won’t lose it in the depths of the river or lake. With a 20W output, this rugged speaker produces some impressive booming bass sounds that will reverberate with the waves. Furthermore, this speaker has a built-in power bank that lets you power up USB-charging devices.