Joe thanks for the advice. That makes a lot of sense. I will get a 2amp fuse before moving the mower on although I am a little inclined to keep it as its a great mower. It is a little too fancy for me though.
Roebuck this is the first one I have found in my travels. Now I know they are relatively easy to work I'm out the hunt for more of them. They do tend to get a little expensive especially when you need to get a new battery. Picked one up for $40 from the local battery shop so I was pretty happy with that.
I think this thread can be closed and hopefully be of use to some others.