High Capacity5000mAh/37Wh High Capacity For JBL Xtreme Xtreme1 Xtreme 1 Bluetooth Speaker. Voltage:7.4V DC.Part number:GSP0931134. Battery typeLithium Polymer Battery.Size:145*32*19mm. Weigh: 251g. Easy to install100% match the original Battery. Economical and PracticalWhen the original battery works not so well. Replace a new battery is more economical than to buy a new speaker.Please feel free to contact us for any questions. After-sales ServicOne year warranty. 30 days Money Back. 24*7 email reply.