So it got hot, and I stopped for a while on this. Its now not as hot and I'm trying to find time for it again.
I realized that I still needed a charger holder of some sort since they're coming off the mower. I'm really hoping this improves their lifespan as it hasn't been great. It should make life a lot easier without tons of vibration and jostling around. So, I took the time to design a 3d printed carrier. I think it came out pretty nice.