It has nothing to do with the power consumption of taillights. When you stop at a red light, the engine is still running and it will still vibrate. These subtle vibrations will be transmitted to the car, and the car will vibrate or tremble in place at a smaller frequency, but it is not easy to detect. The wheels also move slightly in place, which will transmit these vibrations. When braking, the vibration will not be transmitted through slight movements, which may make the vibration feel a little stronger. This is normal, like heavenly sword. Moreover, in the case of idling, the vibration may be more obvious, and some cars will obviously feel a little "shaking", such as the rearview mirror, which will be a little blurred. This is a normal phenomenon, no problem.
The Tian Jian series uses a 5-amp battery, which is a little small, but it is enough. It is not the battery that is difficult to start in winter, but the low engine temperature leads to poor atomization of mixed gas. This phenomenon is very common, and other modes also exist. Even a car with a big battery may not have better starting performance. As long as the battery is in a normal state, it will not affect the cold start. When the car is cold, just start the damper and fully preheat it. In winter, you can also make the mixture of carburetor a little thicker, that is, withdraw it from half a circle to one circle, and then adjust it back when the weather is warm.