Rechargeable Batteries With Solar Panels Built-In

Here's an interesting one: Knut Karlsen (an inventor) has covered some rechargable C-cell batteries with small solar panels (the flexible kind). Now, when left in the sun, the batteries automatically recharge.

How much they'll charge, how fast, or even how safe this is are not questions answered by the inventor (yet), but the idea is pretty cool. HE made these in his own home workshop and nothing complicated is required: some flexible, thin-film sheets and some glue is about it.

Nice!

Click here to see Knut's workshop and his full DIY info for this project.