SOLVED: How to replace battery - JBL XTREME - iFixit
Newell SUN-INTE-103, 2INR19/66-2 Battery for Xtreme 2 - Newell Pro - Camera Batteries, Chargers, LED lights and more
JBL Xtreme Splashproof Portable Bluetooth Speaker with 10,000 mAh Battery, Dual USB Charging Port and Handsfree - Black : Amazon.de: Electronics & Photo
CELLONIC® Ersatzakku GSP0931134 für JBL Xtreme, Extreme, Extrem Lautsprecher Musikbox Akku 5000mAh + Werkzeug-Set 23tlg Soundbox Batterie, Speaker Battery: Amazon.de: Elektronik & Foto