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Battery Terminals (Gen 1-3): JIS, Positive Top Front Left

Dimensions (Gen 1-3): 195mm x 122mm x 205mm+20mm posts (L x W x H)

Battery Terminals (Gen 4-5): SAE, Positive Top Back Left

Dimensions (Gen 4-5): 175mm x 175mm x 190mm (L x W x H)

Weight: 11 lbs (Gen 1-3), 8 lbs (Gen 4-5)

What's Included: 12V LFP Battery, Warranty Card, JIS to SAE Adapters (Onlyfor  Gen 1-3 12V Battery)

Upgrade your Toyota Prius 12V battery with a Lithium Iron Phosphate (LiFePO4) battery from Ohmmu!


The Ohmmu 12V LiFePO4 battery is lighter, more efficient, eco-friendly, has a higher usable capacity, and lasts 4x longer than a traditional sealed lead acid (SLA) battery.


ATTENTION: Our current Toyota Prius Gen 1-3 battery has a reverse terminal orientation from OEM (positive on the front right, negative on the front left). Depending on the battery position used for the install, this may require the positive and negative cables to cross over one another, and/or cable management clip(s) to be removed in order for the battery cables to have the proper reach to connect to their corresponding terminals.

•  4 Years Full-Replacement Limited Warranty

•  Proprietary 12V Lithium cell and BMS technology that is a drop-in replacement to your existing battery (no firmware changes needed)
•  Battery Management System (BMS): manages cell balancing for a long service life and protects your battery from high/low voltage, overcharge, high/low temperatures, and short circuits.

•  Gen 4-5 12V Battery Only: Compatible with the Ohmmu App, a monitoring and diagnostic tool

•  Gen 4-5 12V Battery Only: Battery Management System (BMS), Bluetooth-enabled: manages cell balancing for a long service life and protects your battery from high/low voltage, overcharge, high/low temperatures, and short circuits.

•  Gen 4-5 12V Battery Only: Self-heating technology inside warms battery during charging in extreme cold conditions as an extra layer of protection and for continued operation.

•  Easy to Carry Handle


Ohmmu Bluetooth App (Gen 4-5 12V Battery Only)

Get valuable diagnostic and lifecycle information, State of Charge (SOC), and more from Bluetooth-enabled batteries with the Ohmmu App. 


The Ohmmu App is available for download from the App Store for iOS and Google Play for Android devices.


12V Battery Install Video:


Why go Ohmmu?
1. Increase reliability
2. Longer lasting (more life)
3. Decrease weight
4. Increase capacity
5. Increase power (no voltage sag, better 12v performance, especially for subwoofers/amplifiers)
6. Less waste (less batteries being used and less material in each battery)
7. Increase efficiency (Ohmmu 12v charges and discharges at a higher efficiency than Lead Acid/OEM)

12V Lithium Battery for Toyota Prius

SKU: Y1240P
$379.00 Regular Price
$265.30Sale Price
  • Ohmmu's Toyota Prius Gen 1–3 (2001–2015) 12V battery is group size B19, positive terminal top front left. The Gen 4–5 (2016–2023) 12V battery is group size H3-LN0 (DIN), positive terminal top back left.


    IMPORTANT: Please be sure to select the correct Toyota Prius Generation option when ordering for proper terminal orientation and battery size. 


    Prius 12V Battery Compatibility By Model/Year:


    2001–2015 Prius, Prius Prime, and all years Prius C and Prius V:  Prius Gen 1–3 12V Battery (Y1240P)


    2016+ Prius and Prius Prime:  Prius Gen 4–5 12V Battery (Y1230P-4G-BH)


    B19 is a couple inches more narrow than B24 (the standard Prius Gen 1-3 battery) but fits in the space fine and terminals are proper orientation and size. H3-LN0 is a few inches more narrow than H5 (the standard Prius Gen 4-5 battery) but fits in the space/mounting points and terminals are proper orientation and size.


    Replacement 12V battery for: S46B24R, SLA-9A51P, BTX24HL, 2880021181, SLI51PAGM, OPT8171-767

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