Previous battery was replaced in some service center in Moscow, Russia. When I got back in US, I realized it was so bad and the battery was dead after half a day. I have no idea how long it will be working here, we will see.
I didn't have hair dryer, so I had to borrow one. And the screws on top were made from metal which cannot be attached to screwdriver's magnet. I don't know why, maybe the guys changed it. That was part where I tried to do everything very carefully. Hard part was to pull the battery out, a lot of scary noises haha. The guys put very strong scotch tape there.
Be very careful when you trying to pull battery out. It could be scary and try to not damage any cables, contacts and other small things around. The hair dryer helped; I just didn't know how long I had to dry/warm it.