The manufacturer part number for this battery is YTX5L-BS. Yuasa YTX5L-BS, 12v 4.2Ah (20HR) / 4Ah (10HR) 80 CCA Sealed AGM Motorcycle Battery. 12Volt, 4AH. All YUASA YTX series "Liquifix" batteries use AGM technology which consists of an Absorbent Glass-fibre Matting between the lead plates inside the battery.