Made exclusively for the PartyBox 520 and Boombox 4, the JBL Battery 600 gives you twice the running time.
Double your playback time The JBL Battery 600 makes your PartyBox 520 or Boombox 4 speaker even longer-lasting. With a regular battery life of 15 hours, once the supplied battery is exhausted, simply slot in the Battery 600 and keep the party going for a total of 30 hours.
Fast charge capability With fast charging capability, the Battery 600 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.
