JBL PARTYBOX 1000 powered by BATTERY !!! - YouTube
JBL Partybox 300 - Running on a Lawnmower Battery - YouTube
Amazon.com: 13400mAh High-Capacity Extended SUN-INTE-125, 2INR19/66/4 Battery Replacement Compatible with JBL PartyBox 300 High Power Portable Wireless Bluetooth Party Speaker : Electronics
JBL PartyBox 300 Battery-powered Portable Bluetooth Party Speaker with Light Effects, Black - Walmart.com
JBL Partybox 110 Powerful, portable party speaker with vivid light effects, Bluetooth connectivity, Mic/Guitar input and rechargeable battery, Black - Creative Audio