How long should the hybrid battery be able to power the electric motor in bumper-to-bumper traffic? My NAH is running great....has 6000 miles and I've been getting 35-36 MPG on every tank of gas. But, I've been stuck in traffic twice and both times the battery meter went down very quickly (less than 5 minutes), the EV mode stopped and the engine turned on. After 5 minutes, the EV mode went back on, but then went off again after a few minutes. Is this normal? I find it very annoying to think about burning gas when I have an electric motor available.