Specifications: 1) Metallic jacket, 2) Mercury free green battery, 3) Full size available, D, C, AA, AAA and 9V, 4) A variety of packages, a) Shrink pack , b) Blister card , 5) High stability and reliability, safety and long life, 6) Perfect leakproof, 7) OEM welcome , 8) Provides designing on customer special requirements,