It there any mp3/PMP with lithium battery have solar energy like on the calculator?

Question: Will it be good if there is a solar energy for mp3/PMP with lithium battery?

It would help if going out whole day as it can be recharge without worrying for low power...

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Great idea! I'm sure we'll see something like that in the near future. Not soon enough for you, though, huh?!

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The solar cell would have to be as big as your hand to have enough energy to play music. A digital watch is a little energy.

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