Hybrid battery replacement 2nd Gen

Okay so I'm not the original owner bought the car last year in TX(2008 2nd Gen). So it looks like i have a bad module so i already bought a few of the replacement Cell's but not until i got the battery pack out could i tell that it's already been replaced its not OEM its a dorman battery.

Already talked to them apparently they don't cover any warranty not bought by another owner if it trades hands.

Ok skip to the part where i get the cover off and after checking each cell do i find out These are FIRST GEN battery cell's

I feel like i got shafted royally here. Not only did i purchase the replacement Cell's but now i feel like i should just replace the whole battery pack. But at the moment with out any "work" i'm trying to do this, at the least amount of cost.

If i do just replace the bad cell how long do you think it would be before I have to replace another bad cell?

Or should I just go ahead and replace the whole battery pack being that there First Gen battery cell's?

I do plan to balance the whole thing and do cycle charge of the batteries to try and extend the life of these cell's.

 

Doing deep cycle charges until i can get nearly the most capacity evenly thought-out the pack. Using a few hobby chargers. There only 10amp but it still does the job of restoring the life for capacity.

And after i get them all as equal on capacity i will try to balance them by connected in parallel to get them very closely within .2 or .3

Also using a headlamp to do load testing on each module to see how quickly the voltage delta v re-stabilizes.

Thanks for the information you provided me.