My 12V Battery is dying

According to the Napa website that's a 70Ah battery; whereas Toyota specifies 45Ah minimum. So not sure what your asking? Does it not strap-down properly?
https://www.napaonline.com/en/p/BAT7548

 

Are the dimensions roughly the same, the fiddly-design Toyota hold-down bracket fits (maybe with a washer or two)? It meets or exceeds electrical spec's? Then it's "correct".

 

It does exceed OEM specifications; so the real questions is: does it strap-down and vent properly in it's OEM position? The 2023 Prius battery got moved back into the trunk; correct? If that battery is under the hood, you can forget about item #2.
1. If it isn't properly strapped-down; it can rock around, loosen and/or break connections.
2. It needs to vent properly, since it's technically located in the cabin. There should be a vent hose connected to the battery so it can vent hydrogen out of that compartment (by-product of charging) - explosive hazard.
If that battery doesn't meet either of the above criteria, you've got a very good claim against the dealership for something that will actually meet both those criteria. That would make it a consumer protection and safety issue claim.

Good Luck.......

 

Yeah, OEMs are Panasonic or some other Japanese brand, not Napa. You could hassle them to replace it, but most likely they won't budge because it's working and not defective.

 

FWIW, the Toyota designed battery hold-down bracket is incredibly intolerant of any variation in battery height. Just a mm or two, and the damn thing is rocking, requiring washer(s) under the bracket, or shims under the battery. Not sure why they had to be clever, the usual hold-down bracket style has long rods with a hook at the bottom that hooks down there, and generous thread length at the top, that a washer and nut have at least an inch travel.