The battery life of Bose speakers can vary depending on the specific model and how it is being used. Some Bose portable speakers have a battery life of up to 20 hours, while others may have a shorter battery life of around 8-10 hours. It's important to refer to the specific product documentation for information on the battery life of a particular Bose speaker. In general, you can expect most Bose portable speakers to have a battery life of at least a few hours, with some models offering much longer battery life.