Tesla 12v battery cost. How Much Is A Tesla Battery Cost?

Tesla Schedule Service to Replace Low Voltage Battery!

Tesla cars use two batteries, a battery pack and a 12v battery, also known as a low-voltage battery.

These batteries are essential for your Tesla to function correctly. If the battery pack gets low, you need to charge it to use it.

However, if it’s the 12v battery that is low, you have a much bigger problem than that.

You then see a scheduled service notification saying you should replace the 12v low-voltage battery, and you wonder what it means.

When you get this notification to replace a low voltage battery, your 12v battery is low. You have a few weeks to replace it, so you should schedule a service replacement. Failure to schedule a service replacement and the battery fails, you will be unable to use your Tesla at all. However, fixing this issue is a simple thing.

In this article, I’ll explain the need for a scheduled service to replace your low-voltage battery and state its cost.

By the end of this article, you’ll understand all scheduled service notifications to replace your low-voltage battery.

Why Does a Tesla Say “Schedule Service to Replace Low Voltage Battery”?

If your Tesla says you should schedule a service replacement for a low-voltage battery, it means you should replace the 12v battery in your Tesla.

It isn’t a message that you should ignore, as ignoring this message is fatal for your car.

Instead, this message makes you know that the battery is near the end of its life expectancy.

However, seeing this notification does not mean you can’t use your Tesla; it only needs a replacement.

tesla, battery, cost, much

That’s because you will be unable to make use of your Tesla if it suddenly stops because of it.

If you fail to replace this battery in the next few weeks, the 12v battery will stop working, and so will your Tesla.

Simply put, you cannot do the things you do with your Tesla, such as open the door, power the lights, or open the window.

Just know that as soon as you get this notification, you should schedule the replacement, or you’ll need help doing essential things.

For example, because you have a low-voltage battery, you might be unable to update your system software.

If you still need some updates in your vehicle, it might have different functionalities than vehicles of the same model.

You can quickly fix this problem or contact the Tesla service center for a replacement. However, for some models, you must take it to the Service center.

How Often Do You Have to Replace Tesla Battery?

How often you replace your Tesla battery depends on the battery you’re replacing. Remember that Tesla uses two batteries in them.

The battery pack is there to power the Tesla, and the 12v battery is there to power the smaller motor and functions in the vehicle.

If you’re replacing the 12v battery in your Tesla, you should replace it every three years.

Now you don’t have to worry about when to replace it as Tesla notifies you to do that soon.

Typically, you replace them in 3 years. However, it is different for the battery pack as this lasts longer than the 12v battery.

You might have to replace your Tesla battery pack once or twice throughout your Tesla’s lifespan.

That’s because the battery has reduced to less than 70% during that time. Besides, your Tesla can last for about 22-37 years.

However, you can’t expect your battery to last that long without issues or failing, so you might have to replace it.

However, it is rare to see someone who will use a car for so long without changing it.

The chances of replacing your Tesla battery during its warranty period are slight.

According to Tesla, the Model X and S can still retain 90% of their battery after 200,000 miles.

However, if, for any reason, your Tesla battery is below 70% and is within its warranty period, Tesla will change the battery at no cost.

However, it should be at most 100,000 miles or more, depending on your model. But, of course, you will have to pay to replace it if it exceeds the mileage.

For your Tesla to reach 200,000 miles, it will take about 15 years of driving.

You drive about 14,000 miles in a year, so in 15 years, you might not have to change your Tesla battery.

Elon Musk tweeted that your Tesla batteries last between 300,000 to 500,000 miles. So before you can drive your Tesla to cover that, mileage will take a long time.

You may not need to replace your Tesla battery when you use it. That is because the average American used a car for about ten years before changing it.

The battery duration in the table doesn’t mean you will not change your battery during the specified mileage.

It means if all works according to plan, and you ride and maintain your Tesla very well, you should have no problem with your battery.

However, we cannot guarantee that everything will go right; if it doesn’t, it will only be once or twice that you’ll replace the battery.

How Much Does It Cost to Replace a Low-voltage Battery on a Tesla?

It costs about Can You Drive a Tesla with a Low Voltage Battery?

Yes, you can still drive your Tesla with a low-voltage battery. The notification you get to replace it when you need to change it is just a warning to you.

It isn’t that your car won’t start. Although you need the large battery pack in your Tesla to power your vehicle, the 12v or low-voltage battery is to power the auxiliary electronics.

They work hand-in-hand with each other. For example, if, after 30 days, you still need to fix your low-voltage battery, you will be unable to open the door, not to talk of driving your car.

It would be best if you replaced this battery when it prompts you to replace it because you don’t want to be driving it when it dies.

If that happens, you might become stuck in your car as you won’t be able to do anything. You will need to call a tow service to move your car, or they’ll jumpstart it.

So, it’s best to schedule an appointment to replace this battery as soon as you get the prompt.

– 300 to replace your Tesla low-voltage battery at a Tesla service center, depending on the model and warranty.

It can also be low if you decide to replace it yourself; you only need to get the 12v battery and do the replacement yourself.

If your Tesla is under warranty, you won’t spend a dime replacing your low-voltage battery.

However, taking your Tesla to a third party for repair might affect your warranty.

When you want to replace your low-voltage battery, schedule an appointment with the Tesla service center to book an appointment.

That way, you’re sure you’re getting the best service and everything is good.

In addition, you can consider replacing your 12v battery with a third-party repair shop if you are not under warranty.

If you have the 12v battery and want to avoid paying the extra labor costs or have experience with vehicles, you can replace it yourself.

  • Power off your vehicle and open the doors and Windows.
  • Disconnect the large battery pack to avoid electrocution. Next, open the back seats and remove the black plastic cover. Then, remove the black cord with a silver attachment.
  • Open your vehicle hood and remove the black cover nearest the windshield.
  • Remove the air vent at the passenger’s side.
  • Remove the bolt that connects to your battery bracket.
  • Disconnect the negative terminal, then the positive terminal to avoid sparks.
  • Take out the old low-voltage battery.
  • Place your new battery in the place of the old one.
  • Attach the brackets.
  • Attach the positive terminal first and then the negative terminal.
  • Reinstall the bolts you removed earlier on the driver and passenger seats.
  • Reinsert the plastic clever and air vents.
  • Reconnect the large battery pack

You are good to go with your new low-voltage battery, and your car should work as it should.

However, if you can’t do it well, schedule an appointment with a Tesla service center or a third-party repair shop.

V Lithium Battery for Tesla Model S Sale

Drop-in replacement for OEM 12V battery Lasts 4x longer than OEM battery durability, reliability, and efficiency Lighter weight Bluetooth Enabled Kinder to the environment 4 Year Full-Replacement Warranty Fits Models 2012-2021.5

Note: The Manufacturer charges a 20% restocking fee for returned batteries.


The Ohmmu 12V LiFePO4 battery is lighter, more efficient, has higher usable capacity, and lasts 4x longer than the OEM battery from Tesla. It is a drop-in replacement for the Tesla OEM Battery (No firmware changes are needed). Long-time Model S owners tell us that the original OEM 12V lead-acid batteries for their vehicle can be a weak point. They have been known to fail unexpectedly. When that occurs, your Model S is immobile until the 12V battery is replaced. Our 12V Lithium Battery for Model S provides you with increased durability, longer-lasting reliability, decreased weight, higher capacity, and better 12V performance. In addition, this better performance yields improved LED Audio (higher nominal voltage, no voltage sag). Finally, these high-tech batteries yield less environmental waste (fewer batteries being used and less material in each battery) and Increased efficiency (charge and discharge at a higher efficiency than OEM).

Dimensions: 195mm x 132mm x 165mm

Lithium Iron Phosphate Battery (aka LiFePO4 or LFP)

Proprietary 12V Lithium Cell and BMS Technology

Battery Management System. Prevents Damage to Battery in Extreme Situations and Balances the Battery Cells for a Longer Service Life

Included with purchase: 12V MS LFP Battery, Warranty Card, (Optional. SAE Lug Adapters)

Replace 12V Lead Acid Battery with Lithium 12V in Model 3

When an EV is “off”, the 12V load is much higher due to the advanced computer systems that are constantly running to maintain the high-voltage battery pack, keep the vehicle “connected” via remote access features, maintain charging and BMS communications, etc. It can put up to 50 Watts of load on the 12V system when the vehicle is off. This cycle ends up draining the 12V pretty quickly and requires it to be recharged by the high-voltage battery pack regularly.

When turning on an EV. the 12V uses no additional load. While driving, the 12V battery is used for non-driving tasks ( powers the lights, media unit, Windows, locks, etc.). while the high-voltage battery pack focuses on the driving part, which extends the driving range. The 12V battery is subjected to relatively low discharge and recharge currents due to the separation of tasks.

Tesla recommends you leave your car plugged in when not in use. This will further the life of both of your batteries.

The problem:

An EV needs a 12V battery that can handle a high number of cycles and low current requirements, and an ICE vehicle needs the exact opposite: a battery for high discharge and low cycle counts. So, while these lead-acid batteries are doing their job just fine in an ICE vehicle, what does a Tesla need?

The Solution: Lithium batteries

Lithium batteries are typically used for high-voltage battery packs, cell-phones, laptops, medical equipment, and cars where batteries are being cycled frequently, and longevity is important.

For your EV, lithium batteries are capable of tremendous cycle-life and still provide minimal capacity loss and degradation. They also weigh less.


Teslas are programmed to protect the main battery pack as much as possible, and if it’s running low, it may put the battery into a deep sleep/low energy mode. If low-power consumption mode is active due to a low charge on the main battery pack, immediately plug in your tesla to prevent the 12V battery from dying and having to do a jumpstart and/or 12V battery replacement. The 12v battery can run flat within 24 hours once the main battery pack has stopped supporting it.

How to replace 12V battery:

tesla, battery, cost, much

To gain access to the 12v battery, the steps are in the user and first responder manuals because every model and year is slightly different. This is how we did it:

What you need: 10mm ratchet 12V battery, gloves are recommended

  • Open the frunk.
  • Open your Windows to prevent being completely locked out of your car while it’s off. You can even keep a door or two open.
  • Turn off your car completely using the touchscreen. (menu safety security power off)
  • Unclip the backseat on both sides (two clips) and raise it up on the passenger side. You’ll see a black cover. Take that out (- no tools involved). Underneath that, there is a rectangular clip that you’ll release and let it hang off to the side.
  • Go back to the frunk and take out the top cover. It pops in and out with clips so be careful with them as they break easily.
  • Take out the vent cover by also popping it out with the clips. You should now be able to access the 12V battery.
  • There is a bolt right on top that you’ll take off along with the two support bars.
  • Negative side comes off first (black), then positive (red).
  • Once all is disconnected, remove the battery.
  • With the new Ohmmu battery, put the adapters on the positive and negative sides (they come with it). It’ll fit like a cone where the bottom is slightly bigger than the top and one is also a little bigger than the other, so pay attention to those two key things when applying.
  • Put the new battery in place.
  • Secure with bolt and support bars.
  • Put on positive first (red). then negative (black).
  • You should hear the car come on with a whirring noise after this part.
  • Put vent cover back on.
  • Put top cover back on – line it up before pushing in as the clips will break easily.
  • Go back to your back seat and reattach the high voltage plug and cover. The seats should snap back into place.

Specifications Of Tesla 12v Battery

Here are some For specification points for Tesla 12v battery-

The Cost Of 12V Tesla Battery

Under the terms of the standard warranty, which covers your car for four years or 50,000 miles, whichever comes first, Tesla will swap out a 12V battery at no cost to you. Depending on your Tesla model, the primary battery’s warranty is longer than eight years or between 100,000 and 150,000 miles. A replacement Li-Ion battery for your Tesla will cost you more than 400 if it is out of warranty. The older lead-acid battery can change with another for less than 100.

Li-Ion batteries are more expensive but require replacement much less frequently and have additional advantages, such as being smaller and lighter.

How To Replace a Tesla 12V Battery

While changing a 12V Tesla battery yourself is possible, we advise contacting Tesla to have a licensed professional handle the job. It helps to prevent damaging your vehicle, which is essential if you still have time left on your warranty because Tesla will replace the 12V battery at no cost. If you’re an expert, you can swap out your 12V Tesla battery independently. A fresh battery, a 10mm battery, and approximately an hour of free time are all you need.

If you want to change your Tesla battery by your own. These simple techniques can help you to replace the 12V battery in your Tesla.

  • Power off and open the Windows and doors on your Tesla.
  • The back seats should be opened, the black cover removed, and the black cord disconnected.
  • Remove the cover by the windshield and open the trunk.
  • The passenger-side air vent should be removed.
  • Battery brackets should be taken off.
  • The negative black battery terminal was removed.
  • Get rid of the 12 V battery.
  • Place the fresh battery in.
  • Attach the middle bracket once more.
  • The new battery should be connected to the red or the positive terminal.
  • Connect the new battery’s black or negative terminal.
  • Driver and passenger side brackets should be reattached.
  • Reattach the air vent on the passenger side.
  • Reconnect the black high-voltage cable behind the back seats.

Tesla’s 12V Battery Warranty Limit

tesla 12 volt battery is covered by warranty. Most consumers can speak to Tesla’s excellent customer service and commitment to offering its clients the highest quality goods and services. If your current battery fails within eight years or one hundred thousand miles, you can receive a new one at this Tesla service location for free.

In other words, Tesla will pay for any expenses that you want to replace or repair this component in your car.

Safety Reason:

There is a legal requirement to turn on the hazard lights after an accident. However, after a severe accident, Tesla automatically shuts off the main traction battery to prevent a possible fire. If there is no 12V battery, it will be impossible for Tesla drivers to turn on this hazard light.

It’s essential for safety reasons to have an auxiliary battery that can power headlights, ABS braking system, airbags, open door, and other onboard electronics.

In the event of an accident, the Tesla computer shuts down the traction battery. If there is no 12V battery, how the airbags would get deployed?

Human safety:

Tesla’s main traction battery is 400V. It’s impractical to run every onboard electronics or electrical systems on 400V. A 12V battery is safe to touch. However, a 400V might kill you. Therefore, the wires running throughout our car can’t be of high voltage.

It’s also safer for emergency responders as the traction battery is fully isolated.

So, why doesn’t Tesla use a portion of its main Lithium-ion battery to replace the 12V battery? Or, Use a separate 12V Lithium-ion battery instead of a 12V Lead-Acid battery?

We know that a Lead Acid battery is terrible for the environment. However, a Lead Acid battery is stable, can tolerate and operate at extreme temperatures, but a Lithium-ion battery can’t.

A Lead Acid battery does not freeze until.90°F, can charge and discharge over a wide range of temperatures without damage. However, a Lithium-ion battery would get damaged — lithium plating — if we try to recharge it at cold temperatures.

According to battery researchers 2. though we can discharge a Lithium-ion battery from.4°F to 140°F, we can only recharge it if the temperature is more than 32°F. over, a Lithium-ion battery performs best if the operating temperature is between 59°F to 95°F.

Therefore, if we use a Lithium-ion 12V battery, it would get damaged in extreme weather, such as in winter months, when the temperature drops below freezing. Therefore Lithium-ion 12V battery is not the right choice because Tesla ships cars all over the world. It’s why Tesla has to use a 12V Lead Acid battery.

Many suggest using a 12V lithium-ion battery with onboard cooling or heating system, similar to the traction battery.

Tesla traction battery drains 1% per day, even if it’s parked. It’s called phantom drainage. A 12V lithium-ion battery with a cooling and heating system will make this drainage worse. So, it’s not a sensible solution for all weather conditions.


In conclusion, Tesla has a 12V battery to power the onboard computer and electronics. Furthermore, In case of emergency, when the traction battery fails or shuts off, the 12V battery keeps all the vital car parts operable for safety reasons, for example, four-way flashers. Without a 12V battery, the whole car would shut down. over, the industry standardized 3rd party parts such as airbags, the lights, wiper motors, power window motors, power liftgate, ABS electronics, washer fluid pumps, mirror control, fans, power steering, power brakes, wipers motor, AC, heater, etc. operate on 12V.

It’s why Tesla uses a 12V battery on their vehicle.

Leave a Comment