You don't really need all the steps and remove all the parts. I found youtube videos with instructions how to just unplug the battery and remove 2 screws and then use a dental floss to carefully remove the batteries without the liquid solution. I tested the new battery before I glued it in and it worked. After I screwed back everything and put the macbook to charge I noticed after few hours that the light indicator is still orange. Checking the battery status I noticed it is at 0% and unplugging the charger resulted in laptop turning off immediately. It looks like that charging the battery actually emptied it completely or something. Any ideas from anyone?