@Trish ..I keep my domestic batteries in this handy case..
...I use a lot , because recently due to the high price of energy.. I'm using the magnetic motion sensor lights all the way up my stairs.. ( they can also be charged using USB).. the batteries last for ages, and means I fon't have to use the foyer, or upstairs lights.... I've even got sensor lights in the Kithcen , toilet , and the other bedrooms, so if I'm just popping in for a minute I don't need to put the lights on and off ..so the need was great for a Battery storage Case..