Sealed starter battery for lawn tractor lawn mower mower 12V - 18ah Positive pole on the right side Measures: Length: 180 mm Depth: 76 mm Height: 165 mm Overall height: 165 mm Original part number: 18120002 When the time comes to change the battery because it is too low, a first assessment to make is to distinguish a traditional 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 charging cycles they undergo; they can withstand three times as many charging 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.