Updated 15 May 2026
| Brand | JBL |
| Category | Audio Equipment |
| Available at | 1 UK stores |
| 90-day avg | £69.00 |
JBL
JBL Battery 400 4 Cell Battery for PartyBox Stage 320 and Xtreme4
£69.00Fair Price
Cheapest at AV.com · 1 store
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PRICE HISTORY
Current
£73
Change
+28.5%
Avg
£65
Low
£57
High
£73
Volatility
5.6%
PRODUCT DESCRIPTION
- The JBL Battery 400 is perfect for those who enjoy long listening sessions whether youre hosting an event or relaxing outdoors. Designed for the JBL PartyBox Stage 320 this rechargeable battery gives you up to 18 hours of playtime on a single charge. When your speakers power runs low simply swap in this spare to keep the party alive without waiting for a recharge. Fast-charging support means youll be ready to go again in no time. It also doubles as a replacement for the JBL Xtreme 4s internal battery giving new life to your speaker when needed. And with the JBL app you can keep an eye on your battery levels in real time—so youre always in control of your sound.