The JBL 400 battery offers enough power for up to 18 hours of playback, making it easy to keep the party going for 36 hours. It is compatible with JBL PartyBox Stage 320 and JBL Xtreme 4 Bluetooth™ speakers and can replace the rechargeable battery when it starts to weaken.

• Durable quality: Provides reliable and consistent performance with the speaker.
• Fast charging: With 10 minutes of charging, you gain an additional 2 hours of playback.
• Works with the JBL PartyBox app: Check the battery status via the app and easily replace it when necessary.

Each battery comes in FSC-certified packaging printed with soy ink.