NOTE: This model of battery is shipped pre-filled and sealed from factory. Charging will maybe required before first use. Features of Yuasa s GYZ Battery Series: AGM (Absorbed Glass Mat) separators with superior grid and component designs Maintenance free. No need to add water but periodic charging required when not in use Improved charge recovery capability from a deeply discharged condition Longer shelf life Improved life cycle performance Extreme vibration resistance Supplied Factory Activated (non-spillable) - all acid is absorbed in special plates and AGM separators Heavy duty flush mounted terminals. Patent pending embedded brass nut Upgrade for customized motorcylces requiring the best performance