top of page

Battery Terminals: SAE, Positive Top Back Left

Dimensions: 185mm x 116mm x 198mm (L x W x H) / +20mm for posts

Weight: 9 lbs
What's Included: 12V LFP Battery, Warranty Card

ATTENTION: Please note that your vehicle may prematurely recommend 12V battery replacements when a LiFePO4 battery is installed in either a Tesla Model 3 or Model Y.


To remedy this potential issue, our 12V Tesla Model 3 / Y (Rev 4+) battery now features a Bluetooth-enabled BMS that connects to the Ohmmu App, a monitoring and diagnostic tool for your battery.


Upgrade your Tesla Model Y 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.

•  4 Years Full-Replacement Limited Warranty

•  Replacement to OEM Battery

•  Lithium Iron Phosphate Battery (aka LiFePO4 or LFP)

•  Self-heating technology inside warms battery during charging in extreme cold conditions as an extra layer of protection and for continued operation.

•  Proprietary 12V Lithium cell and BMS technology that is a drop-in replacement to your existing battery (no firmware changes needed)

•  Compatible with the Ohmmu App, a monitoring and diagnostic tool

•  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.

•  Easy to Carry Handle


Ohmmu Bluetooth App

Get valuable diagnostic and lifecycle information, State of Charge (SOC), and more from this Bluetooth-enabled battery 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*:


*Please note our NEW Model Y 12V battery (T1240Y-BH) has SAE terminals (JIS to SAE adapters are no longer needed), making the install even easier.

Why go Ohmmu?
1. Increased Durability

2. Longer-Lasting Reliability

3. Decreased Weight (20+ lbs lighter than OEM)

4. Higher Capacity

5. Better 12V Performance - Improved LED & Audio (higher nominal voltage, no voltage sag)

6. Less Environmental Waste (fewer batteries being used and less material in each battery)

7. Increased Efficiency (Ohmmu 12v charges and discharges at a higher efficiency than Lead-Acid OEM)

12V Lithium Battery for Tesla Model Y

SKU: T1240Y-BH
  • Group size B19 battery for use in the TESLA Model Y, 2020–2022.3.


    Spring 2022 and later models are NOT compatible (i.e. any vehicles with revised 15.5V low voltage battery systems).


    If you're unsure if your vehicle is compatible with Ohmmu batteries, please reference this guide:  

    Tesla | All Models | Identifying Low Voltage Battery System (12V vs 15.5V)


    Replacement for: B24LS, 85B24LS, 1129182-00-A, 1129182-00-B

Product Page: Stores_Product_Widget
bottom of page