... 5.CE,ISO Certificatemaintenance free motorcycle battery YIX30L-BS 1.Maintenance Free motorcycle battery with acid tank.2.Nominal voltage of motorcycle bttery:12v3.Capacity:28AH4.Dimensions ... : Guangzhou,China10.Certificate: ISO9001,ISO2000,CE,etc for the motorcycle battery.11.Can supply customers brand and packaging design for the battery. 12V28AH,MF YIX30L-BS motorcycle battery