I am currently flying the Air 2s. I had the opportunity to purchase two brand new batteries, never activated for $75. I anticipate needing them in the future for some side work, but don’t need them right now. I am very picky with my battery charge cycles, and minimums to prolong the life of them, however, can I leave the new batteries in the box for an indefinite amount of time without damage if they have never been charged, or can they still develope issues by sitting idle so long? I appreciate the help.