I am not sure? I will have to look for the users manual to see if I can find out. I have a few different robot pool skimmers. I could make a video comparing the different backets in them. I think they are all pretty much the same size though. But I never compared them side by side.
I have had it since April of this year and it still works great. I will make an update video. I have a few different models that were sent to me to make some videos about too. I was thinking of making a comparison video.
The solar seems to do a great job keeping the robot charged. But if the batteries run down the solar can take a while to recharge it. I like to charge it with AC and then put it in the pool. It will run all day that way. Then I take it out after sunset and put it back in the pool in the morning. It seems to work best that way. I will have to make some update videos.