Yeah a little bit of a head scratcher why they didn’t go with lithium, but I guess for a riding mower weight and power density is not much of a critical feature as with most other battery powered equipment.
I’d be curious about the motor temps, if that’s possible to read. There’s been a few occasions where the battery on that bike went into thermal limit a few times on 90+ degree summer days at my local sand track as I was getting faster.
You can see the light at the 1:54 mark in my video here...
I use Bike Binderz in my trailer, little on the expensive side but they work pretty dang well.
They can also be mounted in a truck bed if using the single slot E tracks.
The wreck I had on a soft sand track dislodged it out of place in the bar pad, it only took some new tie straps to set it back right. Mostly, I’m worried about the helmet hitting it.