Gen 4 cells in a Gen 2

Good advice thanks, do it right the first time as they say. Will order a wire frame #2 in that case.

 

I've got an 07 Gen 2 that has several bad cells. I would like to put cells a Gthe from28 cells from a Gen 4 in the 07. Have been reading some of these articles. My question is if I go to a junkyard or call them how do I know which Gen 4 has NIMH batteries?

 

where are places that I can go about finding wrecked gen 4 nimh batteries to put in my gen 2? My hv battery is operational and I am confident that it still has some life in it. It is original tho, and I would definitely change the battery before failing if I was able to find one of these. (if it made sense price wise in comparison to a new gen 2 battery from toyota) It seems to be difficult to locate them on my google searches, but I can keep it on my radar throughout the next several months. Any feedback would be appreciated.

 

The two quotes below are ways to determine it is NiMh:

 

As quoted above, the Lithium batteries are much lighter. NiMH in a Gen 2 is over 80 pounds. Not sure of the Lithium, but it's substantially lighter.

Also, you can look up the brochures. As I recall, the regular trim 2 (not the ECO 2) was NiMH for the first several years and all others were Lithium. Now the AWD version is the only one with NiMH.

For example:
2016 brochure:


2019 brochure:

 

Every battery case has a very clear label on the exterior as to whether it is NiMH or Li-ON

Try http://www.car-part.com

or this (51534 zip code as a guess)

Search Results

 

This was just what I needed. Thank you!!!!

 

Trim Two ( NOT Two Eco) and, I think, Trim One from late 2017 onward.

 

Hi. Is the Prius V considered a Gen 3? Are the NiMH cells interchangeable with a Prius V?

 

The v is very gen 3. The hybrid batteries are interchangeable although I read somewhere that the 7-seat v uses Lithium.

 

I just bought a hybrid battery pack out of a 2017 Level 2.

Has anyone installed one into a gen3? I'm wondering if the Gen 4 voltage sensor harness (a.k.a "wire frame #2" but for Gen3) is plug and play in Gen 3? I cannot find a new harness online to purchase.

 

This is actually a really good question. I have a Gen 3 harness that was removed from a new Toyota Gen 3 HV battery. I also have a handful of Gen 4 harnesses. I think I need to put them side by side and see how they look.

 

The gen 3 and gen 4 are not identical. The 2018 harness I just checked only has 10 sensing points/10 wires.

 

Ok thanks! They look almost identical.

This gives me a good reason to buy a spare harness and prep it.

 

Just wanted to update this thread. My original gen2 prius hybrid battery pack has finally died. Previously I was going to upgrade the cells to gen4, but was able to get more life out of the original battery after balancing all the cells and putting new bus bars on. Well as of 27th May 2026 it drove its final kilometers before the RTOD and a total loss of power. This original hybrid pack is 18 years old!! (2008 prius) I'm very impressed its lived this long! I have a low mileage G9510-47130 pack arriving tonight that cost me $750AUD and a new Wireframe harness #2 coming from Japan($140AUD. So this Gen2 prius will live another 18 years hopefully

 

I hope your "low mileage" replacement is from a newer car? Not a 2008 with low mileage