Made exclusively for the PartyBox Stage 320 and Xtreme 4, the JBL Battery 400 gives you twice the running time.
Double your playback time The JBL Battery 400 makes your PartyBox Stage 320 or Xtreme 4 speaker even longer-lasting. With a regular battery life of 18 hours, once the supplied battery is exhausted, simply slot in the Battery 400 and keep the party going for a total of 36 hours.
Fast charge capability With fast charging capability, the Battery 400 can deliver up to two hours playback time from a quick 10-minute charge.
Monitor playtime in the JBL PartyBox app Download the JBL PartyBox app and you’ll be able to track your battery’s health. When the Battery SOH (State of Health) status alerts you, simply slot in the new battery within seconds.
