Design on Impulse, based in London, has created one of the smallest smartphone chargers for smartphones. An accessory called Nipper is designed to use the energy of AA batteries to charge a mobile device. According to the developers themselves, Nipper is useful, first of all, for use in the most extreme situations. That is, when there is no charger or AC source or laptop nearby. The dimensions of the miniature device are 17 x 17 x 17 mm and its weight is 10 g. The Nipper can be used as a keychain, which will facilitate its simple transportation. The accessory is compatible with almost any smartphone that has a micro-USB connector. The creators of Nipper are also creating an analogue of a charger that would be compatible with the iPhone. Money to create a miniature gadget is collected through Kickstarter.