Marshall's Portable Speaker Lets You Swap the Battery Instead of Tossing the Whole Thing

Marshall's new Stockwell III speaker ($249.99) ships with a battery you can pull out and replace yourself—unusual for the industry. It runs 40 hours on a charge, double the previous model. Most competitors seal their devices shut to avoid customer repairs. Marshall's approach means a worn battery doesn't force you to buy a new speaker, reducing electronic waste.