Hybrid Battery Reconditioning/Replacement Options?

So I've read up on grid chargers, refurbished hybrid batteries, and the hybrid battery replacement process. Also watched several great YouTube vids on battery reconditioning and cell replacement. It seems that not all of the cells fail, but the system can't charge cells individually. Therefore the charging system can only charge the hybrid battery until the good cells are at full capacity (~7.2Ah if I gather correctly). This means that the worn cells lag behind and pull charge from the neighboring cells, diminishing the total battery capacity.

Full charging and discharging cycles seem to have a rejuvenating effect on the worn cells, as long as heat is contained. But several pros recommend replacing cells that can't sustain around 5Ah since batteries can be fickle.

I've got a Prius that sat for 2 years and I'm wondering what my best course of action will be. A grid charger could be an easy fix, but should I go into the battery pack and balance all of the cells? Of course I can do some voltage measurements and maybe run Dr Prius once I get the car running.

Also, several of the balance chargers used on YouTube say expressly "NOT for use with hybrid battery packs, will cause damage". So can anyone recommend a balance charger that is suitable for the task? Or, should I just buy a refurb battery and drop it in?

Thanks

 

Its 2010 w 120k, low miles so I feel like its worth saving. I'm familiar with the head gasket issues but I'm confident that I'm out in front of the problem and can mitigate it.

Refurb battery is about $1200 from what I've seen so probably worthwhile if I do the labor. Looks like no coding, just plug n pray?

On the other hand, I won't mind having the grid charger around. If it can help condition the battery for longer life its probably worth it.

 

Thanks for the advice. If the Prolong can bring the battery back from the dead I'll try it. Just wasn't sure that it would revive a totally dead hybrid battery.