I have a 1300sqft house which I used to clean with Roomba 980
in the last 3 years. The 980 was great and cleaned all the house with 1 run without any battery charge in the middle.
I replaced it to a i7+ this week and it can't complete my house in 1 run like the 980 did. After 1h and 15min it goes into charging station till it full and then he will continue.
What is wrong? Does the i7+ work slower? The battery is defected?