Subject: How much energy can a Robo hamster generate and can it be harnessed?

After a recent trip to the pet store, I became fascinated with Robo hamsters. 
They are incredibly energetic and active creatures that can run miles and 
miles in a day. Lately I've been doing research on alternative energy sources, 
and correlated their energetic nature with energy conservation. Can they 
create enough energy to charge a battery and if so, how much? Even if it's 
enough to power a small fan, I think we have something here.

Re: How much energy can a Robo hamster generate and can it be harnessed?