... TS16949,CE,SASO.SONCAP etc1.The maintenance free battery is made from silver alloy grid and ... and long storing time witn no leak of acid,absolutely maintenance free,being environment protective product. 3 ... fixing for users having no chance to touch acid liquid, (7)no tempature rising during regular ... ,and no liquid or gaseous acid comes into being and no pullution to environment. lead acid car battery