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 Replacement
Amazon.com: VI VINTRONS Battery Replacement Compatible for JBL JBLPARTYBOX300CN, PartyBox 300, : Electronics
JBL PartyBox 310 splashproof speaker has an 18-hour battery life » Gadget Flow
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JBL PartyBox 300 Review - This Thing Is No Joke - YouTube
JBL PartyBox Encore Portable Party Speaker | with 2 Wireless Mics, Bluetooth connectivity, Rechargeable battery