This product is packaged and shipped with extra protection to help protect your investment. Optima's BlueTop battery is dual-purpose batteries. It can be used in any deep cycle or starting applications. The Optima BlueTop battery will keep you on the water longer. The patented SPIRALCELL Technology means more running time, faster recharge, and up to twice the life of traditional marine and RV batteries. The Optima is over 15 times more resistant to vibration than other batteries. The constant vibration and jarring from waves can be deadly for traditional marine batteries. The tightly wound construction in Optima batteries minimizes plate movement and subsequent damage caused by harsh conditions extending battery life. The Optima is spill-proof and maintenance free. Because of its completely sealed case, Optima batteries are extremely safe. Acid can't leak or spill, making them clean, user-friendly and environmentally sound. In addition, the maintenance free sealed case design eliminates the need to add water or clean terminals. Optima Blue Top batteries are spill proof, so they can be mounted anyplace inside a boat or RV, in almost any position. In the off-season, sometimes marine batteries sit for months at a time and lose their charge. But the Optima BlueTop battery has such a low rate of self-discharge, that it can go unused for up to one year without recharging, if kept at or below room temperature. And because of its low internal resistance, it recharges faster, getting you back on the water quickly.