High Capacity Cameron Sino 5000mAh Li-Polymer Replacement Battery for JBL Xtreme, JBLXTREME, fits JBL GSP0931134 - Walmart.com
JBL - Xtreme Battery Replacement
100% Brand New Large Capacity 7.4v 10000mah Rechargeable Xtreme Gsp0931134 Battery For Jbl Xtreme Bluetooth Wireless Speaker - Mobile Phone Batteries - AliExpress
SOLVED: How to replace battery - JBL XTREME - iFixit
Amazon.com: Pickle Power GSP0931134 Battery for JBL Xtreme, Xtreme 1, JBL Extreme Bluetooth Speaker with Tools : Electronics