The optima YTR-5.0 66Ah 845A 12V battery is a dual battery, serving both starter applications and deep cycle applications. Lasts up to three times longer than conventional batteries. Provides consistent performance that keeps the battery running at the same level even during discharge processes. More power during the first seconds of the starting process compared to similar batteries. Perfect for seasonal uses. If stored fully charged, it can hold up to 12 months at room temperature (or below) and still start a car. Fifteen times more resistant to vibrations than standard lead-acid batteries. Can be installed in almost any position. Maintenance free battery, If you are looking for the maximum possible power or work in the toughest working conditions. Don't hesitate, choose a Optima YTR-5.0 battery. Optima YTR-5.0 batteries are pure power. Designed with the exclusive SPIRACELL technology to obtain the following benefits:, Batteries capable of providing great starting power, 15 times more resistance to vibrations than a conventional battery, Longer life cycle compared to traditional batteries, Constructed spill-proof, No maintenance required, Designed to work in the most demanding working conditions.