Product Descriptionfor use with Bose SoundDock Portable digital music system * provides up to three hours of operation * lithium ion rechargeable battery pack * battery weight: .86 lbs. *
Expensive - but then it's a Bose and worth every penny (Rating: 5 out of 5) When running the SoundDock in battery mode at a party-level (2-4 below max) of volume you get around 3-5hrs of playback. At lower levels you can go 8+ When you're out without a plugin location and want to have a good party with great music a backup battery is essential. This fills the bill!