Sealed starter battery for lawn tractor lawn mower 12V 30AH Positive pole on the right side Dimensions: Length: 196 mm Depth: 130 mm Height: 160 mm Total height: 176 mm When the time comes to change the battery because it is too low, a first assessment to make is to distinguish a conventional free acid battery from an AGM battery. The difference between AGM batteries is in the amount of energy they can store and in the resistance to charge cycles they undergo; they can withstand three times as many charge cycles as a normal betteria. This is why fitting a conventional lead-acid battery instead of an AGM is a mistake that can compromise both the battery and the tractor. Tightness Tilt tolerance Vibration resistance Safety Even in the event of damage to the casing, up to and including rupture, the acid remains in the fibreglass. The possibility of uncontrolled acid leakage is practically excluded.