That sounds like a neat scooter! I went through a scooter stage. My nieces, nephews and grandchildren would all come over to ride them with me. They were all cheap kid type scooters. We had a couple gas scooters and a couple of electric scooters. I also put an 80cc 2 stroke motor on a mountain bike. That was fun! Fortunately I sold it before I got a ticket. I sold all but one of the scooters, and one motorcycle.
We have a small airplane; the batteries for that cost a small fortune these days. Because airplane batteries sit for long periods between charges they often last only a couple years because of sulphating. The desulphting charger has really paid for itself many times over.
I had a PA22/108 (Colt). A good starting battery in a plane is really essential if you stop the engine in flight for slope soaring (well, at least not losing altitude as quickly in the Colt) and then need to restart it.