I alwayz keep this back up light with me because it conveniently fitz in the credit card slot in my wallet. It easily flips up and provideZ me with light whenever I need it. This way I can save my cell phone battery when I need it most and instead get my light from this mini, pocket sized, portable LED light. The card shaped LED light fitz right in my wallet just like any of my credit cardz. It is wonderful for my bedroom, baby room, bathroom, corridor and anywhere around my house! I also like to use it when I leave home and go to bars, cafes, restaurants, weddings, partys, camping and other places too. It is very useful to have on me and easy to keep in my wallet. It takez up to no space because of it’s intelligent credit card design and I alwayz like to be prepared! I can slip the light in my wallet and forget about it until I need it, then I alwayz have it with me…brilliant!