I am a new Prius owner. I inadvertently left the key in the ignition overnight. Will it harm the battery?

Asked by Aug 17, 2012 at 09:03 AM about the 2009 Toyota Prius Liftback

Question type: General

I accidentally left the key in the ignition of my 2009 Prius.  I am a brand new owner.  Will this harm the
battery or anything else?

1 Answer

216,595

If the ignition switch was left ON, it will put a drain on the battery, but will not harm anything. Drive some distance to charge the battery back up, or put it on a trickle charger/take to autozone to have them inspect it, charge it back up to full charge.

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