GSP0931134 Speaker Battery for JBL XTREME / Xtreme 1 / Xtreme1 Loudspeaker Player Original Capacity Battery - AliExpress
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Amazon.com: KFD 12V-24V DC Adapter Car Charger for JBL Xtreme, Xtreme 2, Extreme Edition Portable, Extreme 1 2, JBL Boombox 1 2 Wireless Bluetooth Speaker JBL Boost TV Speaker SoundBar DC Power