Once again you've penned more
Once again you've penned more garbage, proving you are clueless. The 12V battery that runs 12V charging plugs is completely seperate from the main hybrid battery pack, and should never be allowed to run down, or you're stranded. It's a smaller version of the same 12V battery found in a regular car. IThe 12V battery is not recharged by the regenerative braking system, as the main battery is.
Former Prius owner for 10 years.
Dont do what this dude says. Read the owners manual!