Dr. Prius results: Weak Unbalanced Block on hybrid battery

2010 Prius. I’m original owner. 180k. Over the past year I made a lot of investments in the car, such as new tires, brake pads, new 12v and some other things.

About a week ago, my dashboard lit up like a Christmas tree. I received the P0A80 “replace Hybrid battery pack” code. I cleared the code by unplugging the 12 V and plugging it back in and have been driving around a little for about a week with no problems. Today I ran the Dr. Prius app Life Exoectency Test. The results were:
25% capacity remaining
Weak block detected #8
Unbalanced block detected #8

I found a mechanic nearby who specializes in Prius battery maintenance & replacement. He said i could either have him:
1) replace the battery with a refurbished battery and a 1 year warranty or
2) replace block #8 (or the cells?? I can’t remember his exact language) but withno warranty, and for far cheaper than replacing the battery.

Any suggestions on how to proceed? Money is tight, so I’m leaning towards option number two. Especially since I now know how to use the Dr. Prius app and if I have to, I can just have them replace more cells at a later date of more cells go bad. Is this a solid plan?

And how many miles can one drive around with 25% capacity left?