Grass for 2 or is it 2 for 1

Sunday afternoon mission for Mr N and his wife welcomed me to lead me to the back garden. The massive back garden was overtaken by weed and long grass. Mr N wife looks after him and needed help with the garden. She asked me to cut the grass, but said don't worry if you don't have enough time as massive garden. The electric mower was taken out of the shed and battery inserted. 40 minutes into cutting the overgrown and wet grass the mower stopped....battery was at 1%. Oups !!!Went to see Mr N's wife and what is better than another battery ? A second mower which is with a power lead. 2 for 1 and the mowing started again. Cut the edges of the grass around the slabs that lead to the shed too. Mr N's wife was super happy with the grass cut as she did not expect me to cut it all from the terrace to the green house. Put all the tools and both mowers back in the green house. Emptied all the grass into the wheely bin so that Mrs N could just have it ready for collection.