re-chargeable radio

have you heard of a chargeable radio? well i got one. the sister-in-law of my former officemate is working as a sales executive in a big technology firm. they were promoting this new radio, chargeable one. as a treat, they sold it half the price. so there we were, that radio was selling like hot pancakes.

the radio has knob that you will use to re-charge it. inside it is a mini-generator which produce enough energy to keep the radio playing. for one minute of turning the knob the radio will be playing for almost five minutes. though it comes with FM and AM band only. it is also handy that you can put it inside your bag and bring it on a camping trip.

but problem is, that radio is out of stock. why? this is only my guess, maybe the battery companies bought all the units being sold commercially. if that radio will click in the market then definitely the battery companies will be affected. right? well that is just my guess. unverified guess.