My travelings include going over a 5000 ft mountain in 15 minutes. New hybrid battery works great. But at the top or before the battery indication goes into the pink. When this happens I pull over and manually charge the battery as I don't like to drain the battery too much. Is there an adjustment or settings that can cause the system to charge the battery more aggressively ? The car does well otherwise. On flat ground it never goes below 50% (blue) and charges the hybrid battery well. No problems. New battery this year. Few minor problems (ie.. level sensor for headlights is warn out and occasionally it throws a (bad cat oxygen sensor).
there are not any adjustments available. battery charging is software regulated for efficiency, life expectancy and safety. did you buy a new, oem battery from a dealer? mountains can sometimes be a bit of a challenge for prius, especially an old one. they are not the most powerful cars in the world.
I don't recall our 2007 dropping to pink bars going up the grapevine (I5 N of Los Angeles, long steep grade) or on any other long uphill grade. I have seen it in other scenarios when the last pack was on its way out. Maybe use Dr. Prius or another app to check the state of the pack? What it should do is force the pack to charge, at which point the car feels like it has lost half its power, and top speed going up drops.
