The invention relates to the technical field of ultrathin batteries, in particular to a novel ultrathin battery. The novel ultrathin battery comprises a positive
electrode substrate, a negative
electrode substrate, a positive
electrode granular material, a negative electrode
granular material, a diaphragm, a positive tab and a negative tab, wherein the positive electrode
particle material and thenegative electrode
particle material are respectively coated on the positive electrode base material and the negative electrode base material, the positive electrode base material and the negative electrode base material are separated by using a diaphragm, and the positive electrode base material, the negative electrode base material, the positive electrode
particle material, the negative electrode particle material, the diaphragm, the positive electrode lug and the negative electrode lug are packaged by using aluminum plastic films and are filled with
electrolyte. The invention further provides a preparation process of the novel ultrathin battery, the production process is simplified, the
processing is simple, the production
consumables are small, the yield is high, the production cost islow, the
battery capacity is high, the appearance is smooth and not easy to soften, the
hardness meets the high-strength use requirement, and the novel ultrathin battery has market prospects and is suitable for popularization.