I am looking for some boat batteries especially Marine batteries. But before buying them I want to ask about some questions regarding the proper maintenance of these Marine boat batteries. Actually I want to know about the way to keep it safe and proper. Do I need to keep boat batteries in box or open in air? Do I need to worry about the explosion or spark happening all the time? Or should I use an open mount with cables exposed? Please help me with appropriate information pertaining to my query. Thanks.