i always worry about the lightning connector shorting out when it's not plugged in to something.

When they were babies both of my kids happily chewed on lightning cables that were plugged into a charger. They're both still here but all of those cables stopped working shortly thereafter.

"When a Lightning cable is just lying somewhere connected to a charger/computer, but not connected to a device, HiFive limits current on the PWR to a really small value (around 10-15 mA according to my measurements). To enable full current, 0x74 request must be issued by Tristar and processed by HiFive."

https://nyansatan.github.io/lightning/

Woke up with a lightning connector burning into my back, was very uncomfortable