Through a series of unfortunate events, I would up with a brand new battery for a 2.2 Macbook Pro. Don't get me wrong, I'm happy to receive a free battery from Apple (we're talking a $150 value here) and I'm very pleased with their customer service but I'm not sure what to do with it. I'm happy to keep it, but I honestly can't foresee myself needing two batteries at any time in the next year. My first battery died just after the one year mark so I'm considering just keeping the new battery in the packaging for future use but I'm a little concerned that it will deteriorate if it's not used. Right now it's got about 1/2 to 2/3 of a charge as it came from the factory. Will it last in storage for a year or two?