Sealed Factory Activated AGM GEL Lead Acid Battery. No messing around with battery acid – just fit and go! This type of battery can be used in any position and must be securely mounted to prevent any movement. Dynavolt [MG 20HL-BS] or GP Pro [GTX20L-BS] 12 Volt 20Ah Capacity [Cranking Amps 450] Dimensions (mm) – L 175 x W 87 x H 155 Terminal configuration – Negative [Black] LH front polarity Terminal type – T 9 COPPER or T4 LEAD construction. Upgrade OR replacement for CTX20L-BS & DTX20HL-BS Note – Check terminal voltage prior to fitting. If below 12.6V, then charge the battery for best service life. Product may vary from image