Interslice:

 

I was looking at the Ryobi but I don't like how they use a different battery for their 36v tools where as Ozito use the same battery that can be used in anything from drills to an electric bike. Also doing research on Ozito before my purchase it turns out they are basically rebranded Einhell tools and came with a 5 year warranty out the box. 

 

Ryobi did one like that which I had for a while but returned it. The new ones that take 2 batteries are just 18v and use one as a spare for the other so are even worse. The ozito was not a thing when I was looking or I probably would have got it, but went milwaukee as I had batteries already. Self propelled on the milwaukee which is something I really wanted but is hard to find in battery mowers.