How long does the batter last in a 2015 Toyot a camray hybrid

No real set time, I’ve seen them go as soon as 5 years while others are still running on the factory orginals.

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Depends on what kind of battery ( $$$$ ) and how it has been maintained . Each time it's drained for whatever reason it takes a little bit of life out of it . You can buy a 2 year battery or spend twice as much on an interstate battery .

Suggest you check the Owners Manual and attached Documents in the Glove Box. Used to be 10/10. 10 years or 100,000 miles.

I wouldn't buy a 9 year old hybrid. It's right in the window for the battery, the big battery, to quit. They're very expensive to replace and not a job for the do it yourselfer! Hope that helps! Jim