Hello everyone, I'm kinda new on the forum. I have early 2011 15" MacbookPro and still works very well for basic use. I've already replaced its HDD and removed the optical drive, upgraded its RAM capacity over the years. I can still use my macbook but want to make it lighter than now. Is there any way to replace my battery with the other type of macbook battery (Ex. 2014 MacbookPro) to make it lighter? If it is what kind of battery should I buy? I can fix the any kind of problems about stabilizing it. I don't mind that the new battery may shorten the time of usage. I just want to make it lighter Also I'm open to other suggestions to make early 2011 15" MacBookPro lighter. Thank you!