Amazon.com: Youejoeq SUN-INTE-103, 2INR19/66-2 Replacement Battery for JBL Xtreme 2 Bluetooth Speaker (5200mAh) : Electronics
Amazon.com: Youejoeq 6800mAh High-Capacity Extended Replacement Battery for J B L Xtreme 3 Wireless Bluetooth Speaker, fits Part no GSP-2S2P-XT3A : Electronics
6800mAh IBA001GA, GSP-2S2P-XT3A Battery for JBL Xtreme 3 Bluetooth Speaker | eBay