I effectively determined that the 05 Prius will run without gas today. I knew was low on fuel, but thought I could wait and fill up after work, but didn't quite make it. I was going about 65 when the engine shut down and all the dashboard lights came on. I managed to pull off the freeway and drive about 3 miles at around 35-40 mph on electric alone. It was rather scary actually. I managed to find a station while the battery was still about 1/4 charged. I was impressed that it was able to keep running and even recharged the battery to 3/4 by the time I got to work about 10 minutes later. Has anyone else done this by accident/on purpose? Also, has anyone else noticed that the battery never seems to recharge fully. It gets to about 3/4 and that is it for me. I have not seen it in the green since I bought it three months ago.