Started the business season, and I just got a new battery for the MacBook Air.
He's already veteran, and had seen many cities of Russia and not only (purely travel option 11 inches).
For 5 years the battery is so swollen inside that the body itself is contorted and I at first thought he had fallen and bent.
Old and new battery:
Time - 40 minutes left, the cost - remove a couple dozen bolts and all.
Now ready for the new business season in Russia.
All in all!