As i left work my indicator showed a full battery all bars in blue. as i was driving down the coast i noticed the battery started to quickly deplete, in approx 8.6 miles my indicator showed 1 blue bar. at that time i was making a left onto the canyon road. i thought this was odd. as i turned left noticed a decrease in acceleration power. didn't think much of it but about until about 2 miles in i noticed the prius started losing acceleration power the motor was running and the indicator did not show that it was in ev mode even coasting through the canyon and braking. i had to accelerate to come up a slope through a tunnel i had almost no acceleration power. the car felt like it was hesitating i think by the down hill coast and a few spurts of power surges i was able to make it through the tunnel by the 5th mile i had no power to accelerate luckily there was a road where i could make a right. as i coasted to the intersection i turned right then attempted to pull a uturn on a patch of dirt as i was 3/4 of the through the turn there was zero power the vehicle was on but no power engine cut out. no check engine light whatsoever i got suck in the middle of the 2 lane highway blocking both directions! i put on my hazards and attempted to put the car in neutral it indicated it was in neutral, then i shifted to drive but again no power the car was just making a noise and like a very faint grinding noise. at this point cars were on both lanes trying to head each direction i had to get out and push the car backwards to get 1 tire off the side grade then i was still sideways in the middle of the road. i cycle the car 3 times by putting it in park with parking brake with no luck, or power. it wasn't until 4th try it got some power the engine kicked on and i was able to pull back in the right lane and i was stuck at the corner with my hazards on. *tr