I've had a retina macbook pro since launch and I've noticed the battery life has gotten quite worse since I first got it. I understand the battery has about 1000 full recharges until it depletes in life so it makes sense now that it's 2015 (365x3) I would notice this. If I reformat or downgrade to something like Snow Leopard (or whatever it's default OS was), would I get better battery life? I've already disabled transparency and tried doing a few other tweaks which didn't help. I want to avoid sending it into a repair shop/website to replace the battery, that would cost a fortune. Thanks!