4.5Ah, 5Ah & 5.4Ah Sealed Lead Acid Batteries. 12v 4.5ah (as 4ah, 4.2ah & 5ah). With 4.5 Ah and AGM chemical composition, it is perfect for high and low drain devices, as well as solar/wind devices. ULTRAMAX NP4.5-12, 12V 4.5Ah Sealed Lead Acid - AGM - VRLA Battery.