How Do You Know If Your Hybrid Battery Is Bad. So Ive made a video in the past of symptoms your bad hybrid battery might show but it left out a lot of symptoms that Im now experiencing with my battery. First is warning light on the dash - if there is no warning light then it works at least at some level.

As your vehicle gets older fuel mileage may decline a good indicator of a battery thats gone bad. Everything You Need to Know. And whenever this hybrid vehicles battery starts to go bad then note that its symptoms are quite different than those of a conventional gas combustion engine.
Whereas the traction battery or hybrid battery as some call it is used to power the electric parts of the Prius electric motor.
I believe there is an energy monitor screen on. In this video I show how to diagnose a bad hybrid battery in a 2004 prius. 070V 50 acceptable efficiency. Other conditions that can cause the same lightsindicators to come on would well have caused serious damage to hybrid system if I continued to drive.
