The BATTERY by SOUNDBOKS is swappable and compatible with any SOUNDBOKS speaker. This allows you to throw a party without access to electricity or having to hire a generator. At mid-volume, expect 40 hours of juice for any speaker, and when turned to max volume, get ready for 6 hours for the SOUNDBOKS 4 and 10 hours for the SOUNDBOKS Go. You can play music on your SOUNDBOKS even at full blast while charging, too. The BATTERY recharges to full in 2 hours, ensuring your music is always ready to go. Just like our speakers, it s designed to handle all the bumps and drops a party throws its way. Alongside its durability, the design doubles it up as a powerbank, allowing you to charge any USB-C compatible devices. KEY FEATURES: 40 hours of playtime; Fully recharges in 2 hours; Charge and play music at the same time?; Doubles up as a powerbank?; Easily swappable?; 10W USB-C Power Delivery Output (5V, 2A); 5-Step Battery-Life Indicator; BUILD: 99.84Wh or 7.8Ah at 12.8V, Lithium Iron Phosphate (LiFePO4); IPX6 Reinforced ABS Casing; 2.2lbs; 5.9x2.5x3.7; WHAT'S IN THE BOX: The BATTERY; Manual; COMPATIBILITY: The BATTERY is compatible with any SOUNDBOKS model. You can use it to charge any USB-C compatible devices. WARRANTY: We have a two-year warranty in the event of a manufacture malfunction, and we ll repair or exchange the product free of charge within your term. We also have a 30-day return policy. About SOUNDBOKS: Originally from Copenhagen, Denmark, SOUNDBOKS has powered over 6 million parties worldwide, helping people create lifelong friends and memories. Our products give people the power to throw a party or event whenever and wherever they want. We were founded by three friends with the goal of connecting people in real life through music. You don t just hear a SOUNDBOKS. You feel it.