“I also have a 2007 Prius, still on its original traction battery.”
Likely it’s going to die, and soon. I’m sure hot hot weather in Dallas didn’t do any favors for preserving old battery about to fail.
My local Toyota dealer said most fail 10-12 years of age.
I got a factory new battery - 3 year 30000 mile warranty. You can buy others for $1400 but 1 year warranty.
I don’t think they really resell ‘rebuilt’ ones - they’ll sell you modules if you want to tinker with it and find the bad module and replace it - of course the others are likely on last legs too.
One of the hybrid ‘gotchas’ and some are lot more than $1800 for the battery - like 3-5 times as much.
t.