Battery, double-layer colored sleeve for packaging same and battery packaging method

The invention relates to a battery, a double-layer colored sleeve for packaging same and a battery packaging method. The double-layer colored sleeve comprises a bonded membrane coating layer and a printing layer, wherein the membrane coating layer is a bottom layer in contact with the battery, and the printing layer is an outer layer. The double-layer colored sleeve is in a double-layer structure with the printing layer and the membrane coating layer, and only one double-layer colored sleeve can accomplish the packaging of the battery through one-step sheathing and overheat contraction when used for packing the battery. Compared with the traditional packaging, one transparent sleeve is saved for each battery so that the cost is reduced by 0.4 fen/PCS; the one-step sheathing and overheat contraction are reduced so that the production working hour is reduced by 2.8 S (20%), thereby greatly reducing the packaging cost and time of the battery. Meanwhile, because the thickness of the double-layer colored sleeve is