Hi Lisa! Speaking with our Parts Department, a replacement battery for your 2018 Honda HR-V would be $10.29! Please let us know if we can help with anything else.
You might be able to replace the battery yourself. When my fob was broken, I bought a new shell from them for something like 30 or 50 dollars, not sure anymore. I still had the electronic fob from the broken one. They put in a new battery too. Just go there and ask them if you cannot do it yourself. It shouldn't be pricey. Hope this helps.
You tube how to change it yourself first. Most times when you are just changing a battery no reprogramming is necessary.
I know it is around 250.00 I would use Honda to make sure the key works properly. And you may have one free key depending on the package you got with your car.
Try Wal-Mart first
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