Keep the party going with this high-capacity 7.4V 10000mAh lithium-ion replacement battery, specially designed for the JBL PartyBox Stage 320 and JBL Xtreme 4 portable speakers. Built to match the original JBL Battery 400 specifications, this rechargeable power pack restores long playtime, consistent power, and dependable performance so you can enjoy music without interruption.

Crafted from premium lithium-ion cells and integrated safety circuitry, this replacement battery delivers stable voltage output, extended cycle life, and reliable operation in everyday use. Whether your original battery no longer holds a full charge or drains too quickly, this high-performance pack is a cost-effective way to revive your speaker’s endurance and extend its service life.