The BLUE TOP Optima Battery is a high-performance AGM battery with exceptional run time and more recharges than than you would get from a traditional battery. In addition to its outstanding vibration resistance, with the BLUE TOP's efficient power generation and faster recharge times you'll spend less time worrying about your car battery. This means more hours of fun, over and over again. This flexible boat and RV battery is ideal for those who need a power source that requires no maintenance, but still provides a reliable start with plenty of power. It is a sealed battery.