Amp-hours / (Watts / Voltage) = Approximate run time. This means that using a lower power wheelchair with the same battery will increase run-time. However, I'm guessing that the manufacturer lists peak power and the power draw during usage will differ a lot from that number.

You're essentially asking "How do I learn C without ever coding?". There's plenty of books on reconfigurable computing, you can familiarize yourself with the state machines used for DDR memory, and learn Verilog/VHDL syntax. However, if you never actually apply that information then you're going to hit a very low ceiling very quickly.

@Nmaster88 Harmony comes installed with a load of example projects. You should look at them

It works the same way as printf() at a high level. You can familiarize yourself with the console interface in this application note: ww1.microchip.com/downloads/en/DeviceDoc/…

Can you use a polygon or plane?

If the connector board is just a straight through connection then place the ESD protection on the main board instead of the connector board. You just need to protect the receiver from ESD.

USB 2.0 uses single-ended signalling for end of packet, reset, and some other signals. My guess would be that would be why you would terminate using 45 ohms to ground

It doesn't look like you defined any of the transient analysis parameters

The design doesn't change dramatically, you just have to make sure that the components are properly rated.

Not specifically a UPS device but an HID is an HID is an HID. You either missed a command or the command wasn't visible with the options you chose. Make sure that you're not filtering out any commands and you're seeing data transfers in both directions.