Product Specifications Voltage: 12v Capacity: 28ah Format: BCI Group U1 Lead Acid Type: Starting Cold Cranking Amps: 300 Chemistry: Lead Acid Lead Acid Design: AGM Maintenance Free: yes Positive Terminal Placement: Left Terminal Type: Square Hole Nut and Bolt, NB, Nut and Bolt When looking for a new lawn mower replacement battery, be sure to match the old one regarding battery type/chemistry, size, terminal orientation, and terminal type. Both the capacity and CCA rating of the new battery should be the same or better than the capacity and CCA rating of the old battery. When wintering your lawn mower, check its Owner's Guide regarding battery maintenance - if allowed by the lawn mower manufacturer, disconnect the battery (if there are no parasite loads, there is no need to disconnect the battery) and keep it charged using a smart battery charger/maintainer.