products: special batteries (size:4lr44, lr825,23a,27a,aaaa,etc.) 1,the special battery can be designed jacket,packing,duration,size, and so on at your request. it can be used at a wide spectrum. such as when yo u are calling somebody outside,your mobile phone is less of power ,it could be used for charging the mobile phone;it can be used at various remote controllers. 2, super long lasting power 3, extra long life span 4, no mercury and cadmium added,which is enviromental friendly 5, excellent leakproof, as a result of pure material 6, oem is welcome