But after a year and a half with a use of 1 time per week in average, change the batteries 2. For a price of about 60 euro. This is prohibitive !!!
For this reason, I recommend buying this type of robot (unless the battery warranty increased to 2 years).
In English:
Dont buy this kind of robot. it works well purpose you must buy 2 new battery After 1 years (50-60 Euro)