Dead battery?

welcome!
sometimes they just die, others, you might have some minor annoyances pointing you in the right direction. but the car does not offer any low voltage warnings. maybe you left a door ajar or a light on?
either way, you'll have to charge it and test it to see if it will hold a charge. if not, you'll have to replace it. any idea how old it is?

 

there's a date code on top.

 

More probably not the original 12V battery. 12-13 years in a place with actual winter would be quite unusual.

To avoid confusing newbies and non-car-type folks, it is better not to talk about just 'the battery' in a Prius when there are really two very distinct major batteries in the car: a somewhat normal 12V battery, and a high-voltage / hybrid / traction battery. The former comes with most of the regular problems of a common car starter battery. The later is the big expensive one that owners really don't want to have to replace.

 

Try to use 2 Amp battery charger on to 12 V battery after disconnect the ground cable and charged battery to 13 V.
leave the battery over nigh to see the voltage stay to 12.6V or.
its still good if you have 12,6V and you have to get new one if your battery shows lower than 12.6V. Good luck.

 

Odds are 99.9 percent that it is the 12v battery, but you have probably already figured that out by this time.

You can replace it yourself. Lots of posts in this forum, as well as a few YouTube videos would point you in the right direction.

To have it replaced by Toyota, in the USA, you'd be looking at around $300 USD, that would be for both labor and the new battery. Sometimes, dealerships in the USA have service and or parts coupons on their Web sites that can save you money.

Again, not that tough of a job, but if you don't have tools, nor have much mechanical experience, you might not want to tackle it.

One of the forum members, Mendel, is from Vancouver, BC and can probably address your concerns a bit better.

But, yes, the 12v in the Prius can give out without much -- if any real warning. And, not to scare you, but if you try to "jump-start" the car, or to try to charge the battery, be very, very careful and observe ALL precautions in the owner's manual. The Prius is not forgiving if you mess up any steps.

Not sure about Canada, but I suppose it would be the same for you....if you go to the official Toyota Motor Company's car owners Web site, using the VIN number of your car, you can register it and see what service records Toyota has on the car, as well as see if there are any recalls that have not been done -- or have been done (although the Toyota Web site has had some glitches, lately).

Again, don't get too scared, but be careful. Some people here recommend NEVER trying to jump start the Prius.