How do you charge the Big battery of a 2009 Toyota Prius

The fuel will likely have to be siphoned out, disposed of properly, and then the tank refilled with fresh fuel. It is unknown what kind of efforts are needed to clear then rest of the fuel system -- certainly may take some priming to get the fuel in proper quality and quantity to the engine. Spark plugs may be fouled and in need of cleaning or replacement. This must happen before the hybrid battery can get recharged by the running of the engine. www.repairpal.com/repair-shops