Are thre any problems using Lipo batteries in cold weather, 28 - 34 degrees.

You'll want to watch the voltage carefully. In my experience, they have quite a bit less capacity and will lose voltage quite a bit quicker when it gets that cold.

HTH
Jim

I and others have had issues using lipos while they are cold. The battery tends to surge the voltage and drops off like a rock. For example....It was around 38-40 degrees and my plane was ready to fly...the battery was cold and as I took off it lifted off and then quit. The plane fell like a rock and crunched the cowell and prop. I was able to hit the throttle again and all worked fine but it seems that the battery wigged out and stopped supplying voltage due to being cold. 3 others have had this happen to them in cold weather. I now keep my batteries in my jacket pocket to keep them warm before flight and I also run the motor for 20 - 40 seconds at mild throttle to get the battery "Working" and warmed up. No more problems using this routine.