I received such answers from a JBL representative:
Quote: LEDs on the speaker indicate the battery level, the fifth flashing white LED indicates the maximum charge.
Charging time to fully charge the battery needs 3.5 hours.
In the JBL Xtreme loudspeaker, you can hear the quiet noise caused by the power supply. This is the normal behavior of JBL wireless speakers.
Greetings,
Tomasz Nowicki
Tel: +48 32 258 08 98
Fax: +48 32 203 45 09
www.jbl.com
www.akg.com
www.harmankardon.com
I asked in detail but it did not help:
Quote: Hello,
The last LED should be permanently lit, if during charging the diode blinks, please disconnect the charging and check the diode's behavior. If it is steady, please check the battery life. If the diora still blinks, please connect for further charging.
Greetings,
Service department
Tel: +48 32 258 08 98
Fax: +48 32 203 45 09
www.jbl.pl
As for me, the answers are not full. There is no information about whether the last diode during charging should flash or stay on. At my place it flashes even after 5 hours of charging. So you really do not know when the loudspeaker is fully charged. No sound signal or specification regarding LEDs, i.e. flashing / continuous light.
Does anyone know anything about this?