I suddenly lost electrical power in my Rossion yesterday, noticed steering became heavy (power steering shut down), and the engine/RPM gauge went down to zero. Luckily I was able to pull to the side of the road and stop. I was surprised to be able to re-start the car and drive it back home. Being the 3rd owner, I am inclined to believe that the battery (Yellow Top Optima?) has never been replaced. The car is a 2010 (RUS#56). I am not sure what the Optima battery model # is, or if anybody else has replaced their battery with an equivalent brand/model battery, please let me know which one? I plan to order one and swap it out myself. Also read on here about relocating the battery to behind the passenger seat, which sounds like a great idea. Thanks, everyone!