prius 2010 hybrid battery

We have over 150,000 miles.

When we passed 100,000 miles I was anxious. I asked the service manager what he told me was that he routinely sees Prii over 200,000 and 300,000 still on their first battery.

 

The whole thing gets replaced as a unit.

 

You might consider performing preventative maintenance on the battery before it fails to extend it's life. We have hundreds of Prius owners using our products for this exact reason.
Prolong Battery Systems. Extending the life of your hybrid. - Hybrid Automotive

 

You can replace individual cells or the whole unit if you want, but replacing the whole unit would be the easier route and cost around 2800$. If you're replacing the individual cells, you will have to find a unit that you can remove it from and replace it with your cells. It's a little time consuming but its a cheaper route.

 

In my opinion it's nearly impossible to really predict when the hybrid battery may fail.
If I was you? If vehicle performance seems "normal", I'd just to with it.
When it fails, you'll know it.
You could wake up tomorrow with it in trouble, or go years and many, many miles trouble free.

 

just replace a cell as needed. are you capable of diy?

 

OP's (Original Poster) location say he is in Fiji. Climate wise, Fiji is nothing like Maine.

I am only aware of a few Hawaiian members who have had HV Battery failures, and it still seems to fall in line with most: 100K miles - 150K miles [160,934km - 241,401km]
Buying new Battery/ Core Credit | PriusChat

This person lives in Maine, where it its COLD; Maine gets SNOW, Fiji does not.

HV Batteries seem to last longest in cold environments, and when the terrain is flat.

Heat (ie, desert) and mountains seem to give the HV Batteries the shortest life span.

For TROUBLE FREE operation of the vehicle, you want to replace the entire HV Battery pack with a brand new HV Battery pack.

If you have more time than money, module replacement may be for you, but it is a temporary solution. This approach does not last because the remaining modules are still old, and you just introduced a module of unknown quality (maybe weaker or stronger, than the original modules in your pack). Yes, it is possible you may get months, a year, or even upto two years, with this repair, but it is more likely you will get months at best. And, Murphy's Law will have the repair fail at the worst possible time and location: hundreds of KM from home, during an epic typhoon.

Ideally, OP is setting some money aside every month, to cover said repair, when the time comes. The closest Toyota dealership, to me, will sell the HV Battery for $2071 USD. But, when one amoritizes it in terms of total miles driven at the time or replacement, the cost is reasonable; the more miles, the cheaper per mile cost.
$2071/150K miles = $.0138/mile
$2071/155K miles = $.0133/mile
$2071/160K miles = $.0129/mile

For OP, I would go by years, as an indicator. As you get closer to 2020, start preparing for an HV Battery repair/replacement.