First off, I have a '94 corolla, and I want to relocate the battery to the trunk in order to put in a custom CAI. I searched for all the battery relocation info I could find, and noticed that people mentioned marine boxes or dry-cell batteries. Are there harmful vapors that come off of the battery that need to be released and will the marine box be safe enough? Thanks for any info....I already know how to wire it, I'm just looking for safety info and precautions. Thanks!