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What happened was that i was making a mobile charger myself to check my charger i plug it with jawbone. It light up for few second and then light goes off when i check my usb charger with voltage meter it gave about 14 volt throughput to jawbone in the end now my big jambox jawbone is neither turned on nor charge i checked everything in my jawbone but found nothing wrong i am very worried
Hi, You may have damaged the battery or the charging circuit in the speaker. Normally Lithium-Ion batteries should not be charged at more the 4V/cell. The speaker has an 11.1V battery (i.e. 3 cells) so the max charge voltage should be no more than 12V. You may have to start doing point to point testing of the circuit from the charge port to the battery.
The Jawbone has a battery designed to be charged up to 12 volts. The USB port power line is supposed to be a 5 volt supply, so to power the device and trickle-charge the battery, it is connected to a voltage step-up circuit. The output of that step-up circuit should be 12 volts. When you connect a 14 volt supply to the 5v line, you will certainly destroy the step-up circuit, but in the second before it blows it may send up to 35volts to the rest of the circuitry, destroying that too. The chances are that the only salvageable parts now are the box and the battery (which probably won’t be exposed to this voltage for long enough to do any harm before the components in between burn out. Sorry!
