JBLBattery 400 for PartyBox Stage 320, and Xtreme 4 Speaker

About

The JBL Battery 400 is a high-capacity, rechargeable lithium-ion replacement battery designed to extend your music experience with compatible JBL speakers. Built for convenience and reliability, it allows you to swap batteries in seconds so your party never has to stop. With up to 18 hours of playback per battery, you can effectively double your total listening time when using a spare. It also supports fast charging and can be monitored via the JBL PartyBox app for battery health status.

This battery is engineered specifically for the JBL PartyBox Stage 320 and JBL Xtreme 4, offering a seamless fit and dependable performance.

Product Features

• Extends speaker playtime up to 18 hours per battery
• Enables up to 36 hours total playback when using a spare battery
• Designed for quick, tool-free battery replacement in seconds
• Supports 10-minute fast charging for up to 2 hours of extra playtime
• Compatible with JBL PartyBox Stage 320 and JBL Xtreme 4
• Integrates with the JBL PartyBox app for battery health monitoring (State of Health indicator)
• Built as an official JBL replacement battery for reliable performance
• Compact, lightweight design for easy portability
• Lithium-ion battery technology for stable and efficient power delivery
• Comes in eco-friendly FSC-certified packaging with soy-based ink

Product Specification

• Battery Type: Lithium-ion
• Capacity: 7.2V / 9444mAh / 68Wh
• Operating Temperature: 0°C – 45°C
• Gross Weight: 404 g

What's in the Box?

• 1 x JBL Battery 400
• 1 x Quick Start guide