1.manufacter for 16 years 2.service:OEM Agent 3.certificate :CE/ ISO9001,ISO14001,ISO/TS16949/ SASO.SONCAP 4.long service The car maintenance free battery is made from silver alloy grid and have better function of discharging and supper cold cranking performance.It has 20% longger service life(2 to 3 years) and long storing time witn no leak of acid,absolutely maintenance free,being environment ...