“how long can use the battery in a high volume !!! 4 hrs our 5hrs ?”

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• The default Music playtime of our JBL PartyBox 310 is 18 hours of battery life which is only a reference value and may vary depending on the music content and battery age after numerous charging and discharging cycles. This runtime can be achieved with a predefined music source, deactivated light show, a volume of 18 and a Bluetooth streaming source.

  Answered by JBL Support 4 years ago

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