How long should my 1/10 Torment 4x4 run with a 2s, 5000mah Lipo battery? Mine seems to slow down tremendously after 5mins or less. I even bought a brand new battery thinking my battery was the problem. Same runtime! If I turn it off and right back on it will run a few minutes longer at full speed and then it slows down again. Please tell me this isn't normal.