It’s time to get supercapacitor-powered with Blueshift Hydrogen. That’s not a term from Back to the Future, it’s right here and now, and it’s a speaker to be reckoned with. It runs with Bluetooth - connects to your smartphone or tablet with Bluetooth, that is - and it’s set to be rechargeable up to half a million times. That means no cords unless you’re charging, and it means super-powerful sound. This device will be able to be charged fully in 5 minutes, and will be able to play "more than 4 hours at 80% volume." Sound like a winning combination to you?