quentron.com

[Madebymonkeys]

What do you mean by BOM @madebymonkeys  you mean the 1liter? do you know how much power goes to waste in such ipods? Maybe 70percent I would say,for example let's start with the earphones,if we replace coil phones with the finest funkiest sounding piezo phones we drop the requirements straight into the micro-watt range!! The amp would only need to boost to around 1 milliwatt! Adapting the ipod to the battery is where the money is my friend.

BOM = Bill Of Materials.
As for the efficiency of the iPod shuffle, I don't know that. Some of the inefficiencies will be unavoidable of course.
Look at some circuits and tell me just how to drive a pair of 20kOhm piezoelectric speakers at a reasonable volume consuming only uW's - that's worth more than this Karpen funny-business!
In reality, it would mean a radical change in headphones as the drivers wouldn't be backwards compatible with moving coil. Oh and don't forget that piezoelectric headphones have been around for a long time, they didn't exactly catch on.

Adapting to the battery - already done, it's called Li-Ion. The battery is considered at the initial design stages whatever the technology. There's no money in adapting other peoples electronics to match a terrible battery tech.

[Philip Hardcastle]

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[profitis]

@sarkeizen I don't think anyone is going to mind carrying around a 50ml to listen to their favourite numbers all day and night.it will be the cool thing to have and brag to ones friends about I reckon. You saw the power density of mr karpens original long ago now I come here to shrink the size of that thing to a 40th for the same power and you complain?

[Madebymonkeys]

Grow up.

[profitis]

Cost of the radio/ipod battery will be roughly the same or slightly less than a lithium @madebymonkeys.I can tell you one thing for certain,electronics labs will definitely adapt the pleasure device to the cell if it gets to market for maximum reduction in battery size while retaining cool sound vibes.so must I do do this then @madebymonkeys. 150000 pounds sterling for a demo of a everlasting milliwatt range ipod,radio or digital thingy from off the shelves using a 30-50ml bat.