Hey guys, So I read one other thread already about having a "potentially" full battery. Well I am in the middle of my first long road trip in the Pri (from Texas to Virginia and then back again). Life was good until I got to the Appalachian mountains (more specifically interstates 77 and 64 in West Virginia as well as interstate 64 in Virginia). These extreme inclines and declines put me in a situation I had not yet faced in the Pri. The traffic was not light and simply driving 70mph (speed limit) on these grades kinda keeps you up on the wheel. So I was not watching the dash as much as normal. But when I finally did look down...the battery was full. And I mean full...even the terminal caps showed bars. I am not sure if this equates to eight or nine bars. I assume eight? Sorry as I was not trying to count at the moment. Well once I noticed it...I got concerned, but then also found myself where there was little I could do to undo the situation. Braking just charges more and I really could not speed up on the downhills due to the road conditions. I had not yet gotten familiar with the engine brake...perhaps this is what would have helped out some. Then the car did something I did not expect. It shut off the motor (at 70mph) and kept it off. Even when I hit the bottom of the grade and started up the next incline...I was giving it a good bit of throttle and the mpg meter was still showing 100mpg (motor off). I assume this is the fail safe mode the system goes into to put all attention on battery draining. Based upon what I have been reading, the hybrid system seems to not allow over charging...but I still remain concerned. Even once I got on back on an incline...it took a while to pull the battery charge back off of full. For those that know these roads....they are not a few hundred meters of downhill steep declines, we are talking miles. Just curious if any of you have ever seen the batter bar completely full including the terminal caps. I am heading back on Thursday via the same route (backwards). I will add the B mode since I have been tinkering with it since I got here will be interesting to see how it helps. Some of the inclines are so intense...not sure even that engine brake will be enough.