So I have had a Summit for about 2 years now. Went about 6+ months without using it. Recharged the batteries and it would run very slowly for about 5 minutes. Figured it was the batteries. Decided to order a new Titan 775 motor while I was at it. Swapped out the motor without issue. Put in these batteries (11.1V 5000mAh 25C Li-Polymer Battery Pack) from Tenergy. Everything powers up (ESC was red so activated I activated the Lipo function and that turned it green) and the lights all come on and steering works without a hitch. However, I cannot get the motor to turn. It tries when I randomly hit the throttle several times, but only for a quick burst (without wheel movement.) So I decided to hook up the old motor again and it does the same thing. Is it the batteries I bought? They power everything else just fine. I'm stumped. Thanks ahead for any ideas!