20pcs #7 Battery

Material:Alkaline Zinc‑ManganeseSize:21*27*3Instructions:How to Use: Please install batteries with the proper polarity.Note:Precautions: 1. Before the battery is used, it should be placed in a cool place;2. Please refer to the positive and negative (+-) poles of the electronic product to indicate the battery of the device; 3. Do not mix different brands, different types or new and old batteries; 4. Do not charge, disassemble, damage or discard the battery in fire;