New Prius Battery Kit (GEN2, 2004-2009)

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New Prius Battery Kit (GEN2, 2004-2009)

The next shipment is expected around May 15th 2021


What is this?

This is a DIY kit to completely and fully replace your aging or dead Toyota Prius Hybrid Battery (a.k.a. Traction Battery) with brand new battery modules, bus-bars, battery wiring harness, and interconnects. You retain your original metal enclosure and hybrid ECU.

Will this work with my Vehicle?

This is meant for Generation-2 Toyota Prius vehicles, model years 2004 through 2009. We also have kits available for Generation-1 (2001-2003) and Generation-3 (2010-2015) available with request. These modules will work in any number of Toyota and other makes that use the same Panasonic battery design, but the wiring kit is specific to the Prius. With extra (and non-supported) DIY, you could potentially make it work with many more vehicles.
Brand New Batteries: Not a refurb or rebuild. These are brand new modules fresh out of the factory and have never been in a vehicle. ZERO miles driven.
Superior Design: Cylindrical cells, half the battery modules, and all the same functionality. Upgrade your Hybrid Pack today!
Factory Warranty: A 2 year or 25,000 mile warranty on the modules. Fleet vehicles included.

How Much?

For $1600 and 4 hours of installation time, you will get a brand new hybrid battery backed by a 2-year or 25,000 mile warranty including fleet vehicles. There is nothing comparable out there. All other options that are not original Toyota Hybrid packs, are used modules. Some are refurbished and/or balanced to be better matched with one another, but they are still all used batteries from wrecked, salvaged, totalled, or other failed Prius vehicles. In contrast these batteries from are brand new and never used. When you start driving on your new pack, it starts with zero miles on it, just like a brand new Prius from the factory.

The Smarter Financial Investment

Don't waste your money on refurbished or remanufactured batteries. The only real solution to repair your Toyota Prius Hybrid Battery is to replace the entire pack. Anything else is a temporary band-aid, akin to playing the game whack-a-mole. Why spend the same money to put in used modules inside a refurbished pack instead of buying new modules from us? Our batteries at are the smartest choice for any Toyota Prius needing a Hybrid Battery pack replacement.


The Hybrid Battery is different than an original Toyota Hybrid Battery, but it is made to be interchangeable. The largest differences and features are highlighted below
Half the Modules: An original Toyota pack uses 28 modules paired into 14 blocks. We've simplified the design and now you just need 14 larger modules making the same 14 blocks
Fully Compatible: Designed to be 100% backwards compatible with the original modules. Uses the same wire connectors, same mounting, same temperature sensors, same enclosure.
Factory Warranty: A 2 year or 25,000 mile warranty on the modules
Cylindrical Cells: These cells are shaped like a series of large D-Cell batteries instead of the rectangular bricks of the original.
New Bus Bars: The kit comes complete with new solid metal bus-bars to connect adjacent modules together, new nuts, and new wiring.
No Core Charge: When you order, you get your battery pack kit. There is no extra charge for a core, and no deposit required. Your old parts can be saved or sold to offset the cost.
Standard Installation Flow

These kits are no more difficult to install than a standard battery swap. In fact, it is recommended to follow one of the many YouTube videos of how to disassemble your 2004-2009 Toyota Prius [Contact Us for Gen1 (2001-2003) and Gen3 kits (2010-2015)] to access the Hybrid Battery and to put it back together.

Disassemble Prius to Access Hybrid Battery
This involves removing the false floor, some interior plastic panels, and disconnecting the rear seats. All can be done with a socket wrench and a screw-driver. A power-drill is recommended with a socket attachment to make life easier. Average time for a first-time disassemble is roughly 1 hour. An experienced rebuilder can usually do this within 5-10 minutes.
Remove Hybrid Battery from Vehicle
This is a heavy part, it is best to have help. You will need to access the bottom of the pack, so it does need to be fully removed. It cannot be worked on in the car.
Disassemble Original Hybrid Battery
Remove the cover, remove the battery nuts, remove the bus bars, disconnect the venting, disconnect the temperature sensors, remove the tension bar, and end up with the shell of a battery. Since there is no core charge, you are welcome to keep your old modules or to sell them on eBay for others venturing to make refurbished used packs to help offset the cost of your brand new pack! Remember if you ever intend to extract a core exchange fee, you will need your original modules at this time.
Assemble Brand New Hybrid Traction Pack
Line up your modules in serial order. Each of the 14 modules is marked from #1 through #14, and put them in order. Attach the bus-bars, battery nuts, and new wiring harness. Move battery to original enclosure. Attach temperature sensors via included clips. Attach modules from the bottom to the original battery enclosure. Complete the wiring, and put the cover back on the battery. That's it! Average time for a first install is about 1 hour if you are taking your time.
Re-Install Hybrid Battery in Vehicle
Again, this is a heavy part and it is best to have help. Carefully place the newly assembled battery back into the Prius.
Reassemble the Prius
Now it is time to put all the bolts, screws, and plastic panels that make up the rear of Prius back together. This may take an hour for a first time builder, again 5-10 minutes for an experienced installer.
Complete Install
Make sure to latch the orange safety interconnect back in-place (it can be tricky!) and READY the vehicle. If you have codes, it is best to clear them before driving. Your brand new battery is now installed and should be trouble free and worry free for a very long time. You also have the peace of mind that your brand new battery from is fully warranted for 2 years or 25,000 miles, whichever comes first. In the unlikely event of a warranty replacement, we will send you a new battery module for you to install.
Included in the Kit

The Prius Battery Kit requires some installation. If you are not comfortable working with high voltage DC, any hybrid battery installer local to your area should be able to provide the service for you, and the installer may contact us with any questions.
14 Cylindrical Battery Modules: The life-blood of your Hybrid Battery Pack.
Bus-Bars and Nuts: Solid metal bus-bars and nuts to connect the battery modules together and to the enclosure.
Wiring Harness: A new wiring harness to connect to each of the 14 modules, the safety interconnect, and the HV ECU.
Mounting Screws: To secure the battery modules to the original Toyota metal enclosure.
Battery Module Spacers: Orange High Voltage plastic spacers to secure the battery modules.
Battery Module Covers: Orange High Voltage plastic covers to limit exposed high voltage connections.
Temperature Sensor Mounts: Three plastic clips that secure the original temperature sensors to the new battery modules
Customer Support Email: If you have questions before, during, or after your installation feel free to contact us.

2 year or 40,000km/25,000mi warranty. Modules are warranted for block voltage error codes. Installation, labour, and shipping are not included in the warranty. Warranty is serviced by battery factory with as the intermediary.

48 Reviews Hide Reviews Show Reviews

  • 5
    So far, so good!

    Posted by Erica on Apr 6th 2021

    Installed it yesterday with minimal issues. I’ve driven about 50 miles with absolutely no problems. My only suggestion would be to email the instructions immediately after someone purchases the battery. It was a little frustrating to realize I needed to order some insulated gloves the day before the battery was delivered. Otherwise, great product and great experience for me!

  • 5
    I can't believe I successfully performed car surgery

    Posted by Brandon on Mar 16th 2021

    Wow, what an incredible product from these guys! I've never been a "car guy" but when you're faced with the price options of a mechanic fixing your battery, or buying a new one and doing it yourself, you end up becoming a car guy.
    With the help of their extensive and informative instruction manual, in addition to a youtube video, something that would have cost over $3200 was now half of that- and probably the same amount of time too. I learned a lot about my vehicle and gained a lot of confidence in being able to dismantle and reassemble such a vital part of my life. Overall, with 2 guys it took us about 5 hours, no mishaps, no explosive fiery deaths. Great product, thanks so much!

  • 5
    Good quality, worked like a charm!

    Posted by Joel Gundy on Feb 8th 2021

    The battery seems to be really good build quality, the wiring harness all strapped together pretty well with the plastic covers in end and looked pretty professional. My only complaint was that the batteries seemed numbered backwards compared to install videos I found online. Everything is up and running flawlessly now, zippier than ever.

  • 5
    New Batteries

    Posted by George on Feb 8th 2021

    Nice batteries, seems well made. The process of replacing the batteries is well documented. I would say most people that can handle a screw driver can do this. Be prepared that it will take some effort and time. I went slow. My question/concerns were answered within a day. I'd do this again.

  • 5
    Great Investment

    Posted by Daniel Williams on Feb 3rd 2021

    Ordered these new batteries for my 2007 Prius. My hybrid battery was completely dead as it wasn't able to turn over the engine anymore after I let my prius sit for a long time without driving it. Granted it OEM battery was already on the way out. The batteries were shipped the next day I ordered and arrived on my doorstep in 3 days. Replaced all my old modules with these modules and BAM, once everything was put together the car fired right up. Before I changed my battery, I was getting roughly 43 MPG, and now I get 48 MPG and I live in the Tahoe basin area which is pretty mountainous. I intended on keeping my prius for the long haul so I see this as the best investment I could have had for my car, and now it drives great and delivers amazing MPG numbers. Highly recommend this battery if your prius battery is on its way out.

  • 5
    Batteries are performing well

    Posted by Robert Ambler on Jan 8th 2021

    I've had my batteries up and running for a few months now and have about 600 miles on them. My 2004 Prius is running just like it did when it was new. The battery State of Charge (SOC) is no longer fluctuating like it was before, and the car seems to rely less on the Internal Combustion Engine (ICE) than it had been recently. Very pleased with the results and glad that I don't have to worry about when the next module is going to give out. I have more confidence in taking a long trip and not worrying about how long the battery pack might hold out.

  • 5
    Battery works great

    Posted by Keven on Dec 27th 2020

    After doing a bunch of research, I decided to buy one of these as opposed to a reconditioned battery which was about in the same price range (although installed). I'm glad I did, as 5 months down the road this is working great. Our Prius is a 2006 with 220000 miles and runs as good as ever. As far as installation, it was a little tough, as the the polarity of the numbered cells in my kit came oriented differently than what the directions showed. Not being an expert on this I disassembled the cells to match to orientation in the directions. This, I found out later from the seller, was unnecessary as all that matters is that the polarity of the cells matches what's necessary for the installation. Also, the connection from V15 to the control module is a little short. I missed a sensor connection there, which led to a uninstall/troubleshoot/reinstall situation. So my installation advice to those like me who have some electrical/mechanical aptitude but are not experts is buy a good pair of insulated gloves (there is, IIRC, 220v at one of the connections), a good multimeter, and go slowly and methodically through the installation. Then you will have a new battery that should last years as opposed to a reconditioned one that may only last weeks. As for price, this battery was $900 cheaper than the best quote I got for a new battery installed at a reputable shop. And that was probably a bargain quote as Toyota apparently charges $3-4 G's. So with a little knowledge and patience, good tools, and a good work space the potential for savings is great.

  • 5
    Highly recommend this battery kit.

    Posted by Keith Krieger on Oct 22nd 2020

    This is my second one of these. The first one is still working perfectly after three years. I've tried rebuilt batteries but you never know how long they will last. I have alot more confidence in new unused batteries. It's worth the wait for these battery kits.

  • 4
    Works great so far.

    Posted by aaron dewitt on Oct 15th 2020

    I just purchased and installed and it worked right off the bat. the only reason I don't give this 5 stars is that I need to use the battery for a lot longer to see its longevity. if it does well for a while and I remember, I will change to 5 stars.