Battery powered sound system

[BertKoor]

Sorry, I quoted the 72 Wh battery capacity of a JBL PartyBox 310, thought you had that, my mistake. The 110 has a capacity of 36 Wh. You reported at full volume that lasted 3 hours. So one hour (one third) at that volume took (36/3 = ) 12 Wh. Hook it up to a battery of 300 Wh, at the same volume thus the same power consumption that should give you 300 / 12 = 25 hours show time.

Lets work with that 36 Wh figure of your internal battery. Suppose we calibrate the volume knob, put a mark '1' where it consumes exactly 1 Watt. Then the battery should last 36 hours. At least, in theory...
Double the volume, mark it '2'. It now consumes 2 Watts, with 36 Wh battery capacity it lasts 36 / 2 = 18 hrs.
Double the volume, mark it '3'. It now consumes 4 Watts, with 36 Wh battery capacity it lasts 36 / 4 = 9 hrs.
Double the volume, mark it '4'. It now consumes 8 Watts, with 36 Wh battery capacity it lasts 36 / 8 = 4:30.
Double the volume, mark it '5'. It now consumes 16 Watts, with 36 Wh battery capacity it lasts 36 / 16 = 2:15.
Double the volume, mark it '6'. It now consumes 32 Watts, with 36 Wh battery capacity it lasts 36 / 32 = 1:07.
Double the volume, mark it '7'. It now consumes 64 Watts, with 36 Wh battery capacity it lasts 36 / 64 = 0:33.
Double the volume, mark it '8'. It now consumes 128 Watts, with 36 Wh battery capacity it lasts 36 / 128 = 0:16.
Double the volume, mark it '9'. It now consumes 256 Watts, with 36 Wh battery capacity it lasts 36 / 256 = 0:16.


The spec sheet of JBL says it works with any AC power between 100 and 240 V. The power plugs in America are different than in Europe. Buying that American power station in Europe makes it more expensive. But it works both ways. The Miele vacuum cleaner I can buy here for abt €250 costs abt $900 over there

[dupont]

Sorry, I quoted the 72 Wh battery capacity of a JBL PartyBox 310, thought you had that, my mistake. The 110 has a capacity of 36 Wh. You reported at full volume that lasted 3 hours. So one hour (one third) at that volume took (36/3 = ) 12 Wh. Hook it up to a battery of 300 Wh, at the same volume thus the same power consumption that should give you 300 / 12 = 25 hours show time.

Lets work with that 36 Wh figure of your internal battery. Suppose we calibrate the volume knob, put a mark '1' where it consumes exactly 1 Watt. Then the battery should last 36 hours. At least, in theory...
Double the volume, mark it '2'. It now consumes 2 Watts, with 36 Wh battery capacity it lasts 36 / 2 = 18 hrs.
Double the volume, mark it '3'. It now consumes 4 Watts, with 36 Wh battery capacity it lasts 36 / 4 = 9 hrs.
Double the volume, mark it '4'. It now consumes 8 Watts, with 36 Wh battery capacity it lasts 36 / 8 = 4:30.
Double the volume, mark it '5'. It now consumes 16 Watts, with 36 Wh battery capacity it lasts 36 / 16 = 2:15.
Double the volume, mark it '6'. It now consumes 32 Watts, with 36 Wh battery capacity it lasts 36 / 32 = 1:07.
Double the volume, mark it '7'. It now consumes 64 Watts, with 36 Wh battery capacity it lasts 36 / 64 = 0:33.
Double the volume, mark it '8'. It now consumes 128 Watts, with 36 Wh battery capacity it lasts 36 / 128 = 0:16.
Double the volume, mark it '9'. It now consumes 256 Watts, with 36 Wh battery capacity it lasts 36 / 256 = 0:16.


The spec sheet of JBL says it works with any AC power between 100 and 240 V. The power plugs in America are different than in Europe. Buying that American power station in Europe makes it more expensive. But it works both ways. The Miele vacuum cleaner I can buy here for abt €250 costs abt $900 over there

Thanks for the details.
So that's approx 12 hours for 2 jbl partybox 110 at full volume, with a 300 Wh powerstation. that's enought for me.