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Roomba i3 vs. i4: Which Robot Vacuum is the Best?

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Julian Smith

I need a robotic vacuum cleaner that is autonomous as much as possible for routine cleaning; for extensive cleanings, I expected to use my powerful Miele Classic C1. iRobot is a famous production company of robots, so I have decided to purchase their model. I wanted to buy a budget model with a docking station. That was my path to the comparison of i3+ and i4+. First, I was looking at the mode advanced model i4+, but in your comparison, their differences are only navigation software and runtime; I decided to save some money.
The i3+ cleans in rows and stays longer in dirty areas; that is all I need from the robot. I set the required cleaning rooms in the app and received a result. I like that it can go under my furniture, which is difficult to access with my Miele. 75 minutes is enough for my three bedroom 80 sqm house, bedrooms have low-pile carpets. I do not need a wet cleaning, so dry cleaning with 10x suction power is enough. The robot has an Automatic Disposable station, making this model autonomous, and you do not need to clean it every time.
I have had this model for 9 months already, and since then, I have had error 26 several times. This error appears if you do not clean a filter for a long time, which I honestly forget as all dust is collected in the Disposable Station. That is why I have already changed the filter twice (but the filter is non-washable; I do not think regular cleaning without water will reduce the frequency). And two times, I had error 34 because my Wi-Fi did not work, and Roomba lost connection with the app.
I definitely recommend this model as it is worth its money. The only thing is, please check if 75 minutes is enough for you; for a larger house, it will not be enough.


As I understand it, the main difference between the two models is battery life. Can I purchase the battery for my Roomba i3+ as the battery for the i4+?

Richard Harrison

The battery in all Roomba i models (excluding i8) is the same – Replacement Lithium Ion Battery. The difference is the robot software and operation logic, which allows i4+ to work longer with the same battery.

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