2006 Prius no light and no power after parking back in garage

Is it just bad ACDelod 12v battery, or something caused the 12v battery discharged?
Bought used 2006 Prius, ran fine for 10k miles (it is 120k miles now).
Replaced 2 cells for the red triangle. Ran HV battery life test and parked it back in garage. 1 hour later, it doesn't have power and no light.
This is newly bought ACDelod 12v battery came at 12.4v.
Car engine can't start at 12.4v. I had to charged it to 12.85v to get engine starts.

 

Thanks.
I took the new 12v battery out and charged it to 12.95v.
put it back in, engine starts now.

2 new questions come out now.
1. The car powers on for 1st press on power button (brake is depressed): all lights stay on dashboard and power button has solid amber light (seems like car is in IG-ON mode). I has to depress the brake and press power button on 2nd time to get engine starts (ready light shows up and other warning lights disappear).
In user manual, it stays "after reconnect 12v battery, switch to N in IG-ON mode.
Do I need to do that after reconnect the 12v battery to get engine starts by pressing power button once?

2. I used Dr. Prius app to check HV battery life, it shows around 36% capacity left with poor balance for upper voltage about block #3, #6 + poor balance for bottom voltage about block #8.
Do it mean entire HV battery pack (28 cells) need to be replaced, or the battery pack still good for a white after replacing block #3, #6, and #8?


Thanks

 

Thank you.
Just a update, all the problems are related to the newly bought 12v battery from Amazon less than 15 days ago. I never through bad 12v battery can cause error for hv battery.

I replaced the entire battery pack, but Dr. prius app shows the battery pack only has 14% life.
I took the 12v battery out again, charged it up to 13.1v. Left it sit for 20 minutes without anything attach to both positive and negative terminals. It measured 12.77v.
Carried the battery to local autozone, battery was tested bad.

Bought 12v battery from autozone, put it in, car starts fine, and Dr. prius app shows the same battery pack has 89% life.