Gen 4 cells in a Gen 2

That’s 1 dealer. My guess would be they got sick of everybody looking it up on their site. That seems to be the dealer I see a lot when battery price is mentioned. Check other dealers. I had no problems finding it for sale at 4 dealers around me.

Just checked Tracy Toyota current price just went up to 1699.70. Was cheaper last week. And yes it’s available for purchase.

 

Some dealers are lying? I thought dealers were as honest as Abe Lincoln! (not!)


G951047031 - Battery assembly, hv supply. Electrical, wiring, cable - Genuine Toyota Part

 

The 3 dealers on the list by me all had it. 3 different prices though.

 

I just did this today!!! I used cells from a salvaged 2017 with a nimh pack I picked up for $1300. Thank you so much for posting this, trying to rehab used cells was getting so old and time consuming. The dealership wanted $2000 and my battery core for a new (old) 2004-2009 battery. Dorman and other companies sell dangerous, overpriced “rebuilt” batteries that fail at any given moment.

My 2004 has never run better, Dr. Prius app also approves!

 

Dorman and all those others selling repaired batteries are not reliable. Other than the junkyard or from Toyota the only other solution I would recommend is the kit of new cells sold by @2k1Toaster here for $1600. You did better than that for hopefully a low mileage battery. His kit uses new cells and has stood the test of time. I linked it in my signature.

 

So you just swapped the nimh ecu and its cells into the g2 box? The ecu plugs all matched?

 

No, I swapped only the cells

 

oh cool so the G2 ecu was cool with the nimh cells. Thats excellent work there. Thank you.

 

NiMH is what's in the G2 anyway, so using NiMH from a wrecked G4 is fairly common. Are you thinking it was maybe a change from NiMH to Lithium?

 

yes sorry

I got excited there for a sec.

 

I assume this would work on a Gen 3?

 

You assume correctly. The cells in the Gen 2, Gen 3, and the Gen 4s that have NiMH are interchangeable. But, unless you do them all at once, you'll have a pretty bad mismatch.

 

This post helped me, thank you all! I just swapped 2016 gen 4 cells with 10k miles into my 2006 Gen 2 with 233k miles, for $948 OTD!
So far, so good!!
One thing that I noticed is that the cells are mirrored, from the Gen 2, to the Gen 4.
ie. Gen 2 cell 1 is neg-pos, cell 2 is pos-neg etc and Gen 4 cell 1 is pos-neg, cell 2 is neg-pos etc.

 

Yes there mirrored because there all in series pos to neg pos to neg etc.

 

The Gen 2 were in series as well. I just didn't expect the Gen 4 and Gen 2 to be opposite. Definitely glad i took pics and compared!! haha

 

Toyota says they used a higher grade of Nickel in Gen 4. At least that is what a press release said...

 

Do you have a source for that press release? I would really like to see it.

 

It was an early 2016 one.

 

Toyota’s U.S. press releases introducing the fourth-generation Prius model (November 18, 2015) and its new technology (October 13, 2015) don’t disclose the changes to NiMH battery or its cells.

In the SAE journal article on the new hybrid system [1], the authors write, “Electrode material and case structure have been re-designed for the Nickel metal hydride battery.” They explain, “Both battery packs [i.e., NiMH and Li-ion] became more compact, light, and achieved high performance by adopting newly designed cells, and optimizing the pack internal machinery layout.” A separate paper [2] discusses the Li-ion cell design, but as far as I know, there wasn’t a similar paper about the redesigned NiMH cells.

[1] Fushiki, S., “The New Generation Front Wheel Drive Hybrid System,” SAE Int. J. Alt. Power 5(1):109-114, 2016.
[2] Nagai, H., Morita, M., and Satoh, K., “Development of the Li-ion Battery Cell for Hybrid Vehicle,” SAE Technical Paper 2016-01-1207, 2016.

 

I recall seeing it but did not bookmark and cannot find it now.

Thus article mentions some improvements statistically.
Why Toyota offers 2 battery choices in next Prius