Ferrofluid speakers are nothing new. We have covered a bunch of them here in the past. The sovenomund Dancing Ferrofluid Speaker is another cool one that brings your music to life. It has a 4-color adjustable light. It has a transparent container, so you can see all the action.
This speaker has a 3000mAh battery that lasts over 8 hours. As long as you don’t expose it to warm weather and the sun, this should last you a while.