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
JBL Xtreme 2 Speaker, Power :10000 Mah
JBL Xtreme 3 Blue (blue) portable speaker power: 100 W autonomy: 15 hours battery: 5000 mAh - AliExpress