Description
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JBL Battery 400 Spare Battery – Compatible with The JBL PartyBox Stage 320 and Xtreme 4 Portable Speaker (Speaker Sold Separately)
The JBL Battery 400 is an external battery designed to extend the playtime of compatible JBL speakers. Here’s a breakdown of its key features:
Double the Playtime:
- Each battery provides up to 18 hours of additional playtime for your speaker, effectively doubling the total playtime on a single charge.
- This is perfect for extended outdoor parties, camping trips, or any situation where you don’t want the music to stop.
Fast Charging:
- In just 10 minutes of charging, the JBL Battery 400 can provide your JBL PartyBox Stage 320 or Xtreme 4 with an extra 2 hours of playtime.
- This is a lifesaver if you find your battery running low and need a quick boost to keep the party going.
Guaranteed JBL Quality:
- As an official JBL product, the Battery 400 is designed to perfectly match the power requirements of your JBL speaker.
- You can be confident that it will deliver safe and reliable performance.
Monitor Battery Health (PartyBox Stage 320 only):
- With the JBL PartyBox app, you can easily check the health of your PartyBox Stage 320’s internal battery.
- This helps you decide when it’s time to swap in a fresh JBL Battery 400.
Eco-Friendly Design:
- JBL cares about the environment. The Battery 400 comes in FSC-certified packaging, which means the cardboard comes from responsibly managed forests.
- Additionally, the packaging is printed with soy ink, a more sustainable alternative to traditional inks.
Compatibility:
- It’s important to note that the JBL Battery 400 is only compatible with two JBL speaker models:
- JBL PartyBox Stage 320
- JBL Xtreme 4
Overall, the JBL Battery 400 is a great option for JBL PartyBox Stage 320 and Xtreme 4 owners who want to extend their speaker’s playtime and keep the party going all night long.


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