Ryobi snowblower stalls seconds after starting
Ok so I was unable to troubleshoot this on my own, and I checked the batteries out a few times, they seemed perfectly fine.  So took it into the shop, turns out the problem was a burned out motherboard.  Fixed under warranty, so that's good.

Just wanted to post the update here for anyone else encountering similar symptom.

Batteries are fine, no issues with them.

Cheers!