By Shane McGlaun
Most of the gadgets we use today have batteries of some sort inside them as do a growing number of cars. Battery tech is an area of intense research and development as an alternative power source for all sorts of products.
The world’s first air-powered battery has been unveiled and is called the STAIR (St Andrews Air) battery. The battery is charged just like any other battery directly from an AC outlet, but when power is discharged from the battery, it draws more energy form the air around it.