To switch these batteries on, all you need to do is add water! Let’s take a look at these useful devices, and explore some of their applications.

A water-activated battery as used in radiosondes. Credit: JonathanLamb, public domain Water can be added to the battery in a variety of ways, depending on the desired application. So-called ...

The 100-megawatt battery, built by Tesla, was officially activated on Friday. It had in fact provided some power since Thursday due to demand caused by local hot weather. South Australia has been ...