New Prius Battery Kit (GEN2, 2004-2009)

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New Prius Battery Kit (GEN2, 2004-2009)

The next shipment is expected around Nov 10th 2020


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.

37 Reviews Hide Reviews Show Reviews

  • 5
    Prius gen2 battery

    Posted by Unknown on Jul 23rd 2019

    The batteries were easy to install with the mostly clear instructions sent with the batteries. Online support is timely and informed.
    After installation my car worked without any further issue. Will purchase again if these batteries die after another 150k miles of use.

  • 5
    New Prius Battery Kit Gen. 2

    Posted by on Jul 22nd 2019

    This is the only alternative to the Toyota dealer for a new battery. If you have the time( 4-6 hours) and the ordinary tools needed, assembly is not a problem. My car has been running like new since I put this in just over a month ago and the state of charge is very steady and fuel efficiency is high. The instruction manual is very good but not perfect, could use a little tweaking. The person at the company always responded quickly to my email questions however. Delivery was quick and I liked that shipping was included in the price. I highly recommend this battery.

  • 4
    Prius Battery Kit

    Posted by Peter Belay on Jul 20th 2019

    The kit was very well made, but the manual was hard to follow. Will need a few hours of time to install. Plan on half a day.

  • 5
    PRIUS BATTERY KIT (GEN2, 2004-2009)

    Posted by James Lane on Jul 19th 2019

    First time I have disassembled and reassembled a piece of machinery and the assembly was easier than the disassembly. I believe I used the best option on the market. My original battery lasted 15 years and 320,000 miles. I'm hoping this one will outlast the car.

  • 5
    Excellent battery replacement

    Posted by Eldon Berg on Jul 10th 2019

    After having a module go out in my 207 Prius and spending 2 weeks charging and discharging battery modules, with no end in sight of getting all the packs balanced and determining which modules I should replace. I decided to get the "New Prius Battery" and can't be happier. Also gives my wife peace of mind rather than having used cells replacing used cells.
    The kit and instructions are very easy (if you consider yourself somewhat handy with tools). The instructions are very complete and easy to follow. The parts appear to be of excellent quality and the Prius is up and running with the battery alwasy at full charge, Very satisfied.

  • 4
    New Prius Gen2 (2007) battery kit

    Posted by Randall Gould on Jun 17th 2019

    It took several days from the time I ordered the battery kit (Monday) until it was fulfilled. I wrote an Email on the third day and was answered fairly quickly. The package was sent the next day. Everything came in the following Monday. I already had the problem battery pack out and on a sturdy table. The previous replacement battery was a re-manufactured Dorman battery that lasted 4 years and almost 2 months. No instructions were included with the package. However, I had already gone online and found a good set of instructions. A few days after I got done, I received the instructions by Email. Between the online instructions that I found elsewhere and my background as a copy machine repair person and car mechanic. I avoided the pitfalls and potential mistakes that could have been disastrous. Before the final reassembly of the inside panels, I cleared all of the remaining codes. I started it up, aimed for the street. I punched it pretty well, when I hit the street OMG, it about put me in the back seat. I took it for a short road trip. The performance is impressive and the computer display indicated an improvement in fuel mileage of 2-3 mpg. Impressed, except for the no instruction issue and slow fulfillment. Now to see how long it lasts. Since it's my wife's car, she is very happy and as all good husbands know. Happy wife, happy life.

  • 5
    GEN 2 battery kit

    Posted by David Gwerder on Jun 9th 2019

    It worked well, the instructions could use a little more work. I appreciate the invoice print option on the web site, it is perfect for what I needed

  • 4
    New prius battery

    Posted by Boris Ivanov on May 31st 2019

    The battery was packed very well and shipping was very fast. Installation is not that difficult , but it is time consuming, it took me about 7.5 hours to do the swap. I have been driving the car for a week and see no issues. The only reason I'm giving it 4 stars is because I found the manual a little confusing, for example I had to dissemble the modules so I can attach the heat sensors, so I would suggest attaching the sensors while assembling the modules. All and all I am happy with the product, and I will recommend it.

  • 5
    2005 Prius battery kit install success!

    Posted by Kevin Gable on May 22nd 2019

    The battery pack install was fairly straightforward using the included pdf instructions and my car is back on the road with a battery pack that will hopefully outlast everything else on it..