That's exactly the situation here. I forgot the adapter when I took my crawler out this afternoon (I'm waiting for the stock ESC to take a dump running on 3s, so i haven't changed over). Wasn't able to drive another 20 minutes back home and then 20 minutes back there with an impatient wife and family in tow. So turns out, it's more than enough of a connection than needed for crawling! Connected didn't get hot. Wouldn't do it for anything other than "emergencies".
Under any other circumstance, this would have been a NO.