My batteries kept their charge pretty well without trickle chargers—I checked them frequently. I have been a bit OCD with my batteries, as advised by the salesman: Made in Portland, each set contains two hand-blown, 8 oz. I bolted the charger behind the seat and the leads stay connected at all times. We swapped chargers and that was that. Just an update on my issue.
The repair backlog is considerably shorter and your level of urgency is less because your grass isn't growing. I'm sure PJ and Hustler will do what ever it takes to make this right for you. Variable height adjustment is at your fingertips for either hard surface or turf work, and all the material is accumulated in a breathable-hard bottom mesh turf bag with an integral dust cover. Less noise and minimal environmental impact would be very nice. A maintenance-free transaxles.
I am sorry you are experiencing the issues you are having. Another advantage is that some of these kinds of chargers can typically be kept outdoors; even permanently fixed to the mower for convenience. My batteries kept their charge pretty well without trickle chargers—I checked them frequently. A lot of thought and engineering went into the Zeon to get the performance you expect from a commercial zero-turn mower. Until then, the mower will need to be in our attached garage. Nice feature, but if you get off the mower to open the garage door, it consistently locks up, and you again need to let it sit for a while and cycle through the sequence.