Can I install a higher capacity battery in my Tesla Model 3 EV?

Yes, you can install a higher capacity (Ah) battery as long as the physical dimensions fit your Tesla Model 3 EV battery compartment and the positive terminal position matches.

What battery fits the Tesla Model 3 Ev?

The Tesla Model 3 Ev requires a battery with the correct capacity (Ah) and Cold Cranking Amps (CCA) for this engine. Compatible batteries offer 38 Ah, 460 A (CCA), 12 V, case 51R (BCI). Browse the compatible battery list below.

How many Ah does the Tesla Model 3 Ev battery need?

The exact Ah rating for the Tesla Model 3 Ev depends on the vehicle's original electrical consumers. Compatible batteries offer 38 Ah, 460 A (CCA), 12 V, case 51R (BCI). Use our finder for a precise recommendation.

What type of battery does my car need?

You need the make, model and engine. If your car has Start-Stop (the engine switches off at traffic lights), it needs an EFB or an AGM battery, depending on what it came with: if it has an AGM, fit another AGM; if it has an EFB, another EFB or an AGM. On cars with battery management (BMW, Mercedes, VAG group…), moving from EFB to AGM requires coding the new battery. Without Start-Stop, a conventional battery is fine, or an EFB or AGM if you want a longer life.

What is the difference between AGM, EFB and standard batteries?

A conventional (lead-acid) battery is for cars without Start-Stop. An EFB is a reinforced conventional battery for basic Start-Stop. An AGM offers the highest performance and is fitted as standard on cars with advanced Start-Stop, regenerative braking or high electrical demand. Replacement rule: an AGM only with another AGM; an EFB with another EFB or an AGM; a conventional battery with any of the three. Never move down in technology.

How do I find the right battery for my vehicle?

Use the search tool by selecting your vehicle's make and model. Our system automatically filters compatible part numbers verified by our technicians. If you have any questions, contact us via WhatsApp.

What warranty do the batteries have?

All our batteries come with the legal guarantee provided by consumer law against manufacturing defects. If a battery has a manufacturing defect, it will be replaced at no cost to the user.

How long does it take for the battery to arrive?

Under normal circumstances, batteries usually arrive within 1 to 2 days of ordering. However, there are some cases where delivery may take a little longer: peak seasons (Black Friday, Christmas, etc.), palletized shipments, occasional stock shortages, etc.

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Tesla Model 3 EV

Batteries for Tesla Model 3 EV 283 hp (electric, from 2020)

Tesla · Model 3

Which battery does a Tesla Model 3 EV need?

Specifications and battery: EV (283 hp)

Tesla Model 3 EV (283 hp, electric, from 2020) takes a 45 Ah, 380 A AGM battery (237 × 127 × 227 mm), with the positive terminal on the right.

Brand: Tesla
Model: Model 3 (5YJ3)
Built: 03/2020 - 2026
Power: 208 kW / 283 hp
Fuel: Electric
Body type: Saloon
Drive: Rear-Wheel Drive
Engine codes: 3D5

Battery for this engine

Version	Technology	Capacity	Cold cranking (EN)	Size (L×W×H)	Polarity
Main	AGM	45 Ah	380 A	237 × 127 × 227 mm	+ on the right

This engine shares its battery with the EV (238 hp), EV (256 hp), EV (261 hp), EV (275 hp) and 17 more: the compatible batteries are exactly the same.

Data: vehicle specifications and the battery manufacturer's application catalogue.

🔧 Battery Expert Advisor

Battery analysis for your Tesla Model 3 EV

Quick answer You need an AGM battery of 45 Ah. Our recommendation: EXIDE EK454.

Batteries in your Tesla Model 3 EV

Which battery do you want to replace?

MainOne optionSee all in the list →

Our recommendation

EXIDE EK454

AGM45 Ah380 A

237 × 127 × 227 mm

€212.40Buy

AuxiliaryOne optionSee all in the list →

Our recommendation

EXIDE EK454

AGM45 Ah380 A

237 × 127 × 227 mm

€212.40Buy

Prices and availability updated on 23/10/2026

Based on the batteries we found for your vehicle, our experts help you pick the right one.

📋 What we found

For your Tesla Model 3 EV we found 3 compatible batteries. This list includes 1 Start-Stop battery and 2 auxiliary batteries.

⚡ Starter or auxiliary battery

We detected an auxiliary battery among the compatible ones. The auxiliary is NOT your main car battery: it is a smaller secondary battery that powers sensitive electronics. Don't mix them up when buying. Usually what fails is the starter battery (the main one), but the auxiliary can also fail. If your vehicle shows intermittent electronic errors but starts fine, it may be the auxiliary; if cranking is weak, it is usually the starter battery.

✓ Your Tesla Model 3 EV uses the Start-Stop system. Every battery shown is compatible — no conventional options to confuse you.

🔋 Technology (AGM / EFB)

✓ All Start-Stop batteries in the list are AGM. If your current battery is AGM, this is the right replacement. If it is EFB, an AGM is also a valid upgrade, but on cars with battery management (BMW, Mercedes, VAG group…) it must be registered and coded for the new technology with a diagnostic tool; otherwise the car keeps charging it as an EFB.

📊 View AGM vs EFB vs Conventional — full comparison

⭐ Our recommendation

Our main recommendation

For your Tesla Model 3 EV it's the recommended battery: EXIDE EK454. Its specs: AGM technology, 45 Ah capacity, 380 CCA cranking power, 237×127×227 mm dimensions.

See this battery →

Was this advisor helpful?

Verified selection

Class: Car Batteries
Brand: Tesla
Model: Model 3
Engine: EV

Order now with express shipping: your product ships today and arrives on Monday before 5 PM (Spain mainland and Portugal only).

Before you buy: check 3 key points

Although the batteries shown are sourced from information provided by manufacturers, we recommend checking on your current battery:

Dimensions (length × width × height, including terminals and protrusions)
The dimensions shown are the maximum of the battery and include the height of the terminals, small ridges at the base and any lateral protrusions. Measure your current battery completely, from edge to edge. The new one must be the same size or slightly smaller — never larger, it would not fit in the housing.
Positive terminal (left or right viewed from the front — check the battery photo carefully)
Stand facing the battery, with the manufacturer's label facing you and the terminals on top. Locate the terminal marked with +: if it is on your right, it is "positive right"; if it is on your left, it is "positive left". Do not rely on how the battery is mounted in the car — the position is always measured looking only at the battery itself.
Technology (AGM, EFB or conventional — the same as your current battery or higher)
Depending on the manufacturer, the same technology may be labelled differently: AGM may also appear as VRLA, AGM Start-Stop or AGM Deep Cycle. EFB may appear as EF, EFB+ or Enhanced Flooded Battery. Conventional may appear as SLI, Lead-Acid, Wet or Standard. If your vehicle has Start-Stop, the battery must be AGM or EFB — never conventional.

If you have any questions, just ask us and we'll be glad to advise you with no obligation.

Start-Stop & high energy demand batteries

AGM or EFB battery for start-stop vehicles and for cars with high energy demand (many electrical consumers, frequent starts). More charge cycles, better charge recovery and longer service life.

1 product

This engine comes with an AGM/EFB battery as standard: the car's charging system requires it even without Start-Stop. If in doubt, message us and we will confirm.

🔥 Most popular
Auxiliary battery Optima YTR-2.7 12V 38Ah 460A AGM
- 12 V
- 38 Ah
- 460 A
- AGM ESPIRAL
Dimensions 237×129×227 mm

€214.50
Compare

Comparison table of available products
Category	Make	Reference	Capacity	Cold cranking	Dimensions	Technology	Price
Start-Stop & high energy demand batteries	OPTIMA	YTR-2.7	38 Ah	460 A	237×129×227 mm	AGM ESPIRAL	€214.50	More info

Auxiliary Battery

Auxiliary battery for vehicles equipped with start-stop systems. It supports the main battery in functions such as engine start, the start-stop system, or additional electrical support.

2 products

Comparison table of available products
Category	Make	Reference	Capacity	Cold cranking	Dimensions	Technology	Price
Auxiliary Battery	EXIDE	EK454	45 Ah	380 A	237×127×227 mm	AGM	€212.40	More info
Auxiliary Battery	TUDOR	TK454	45 Ah	380 A	237×127×227 mm	AGM	€212.40	More info

Complete your purchase

Chargers

Chargers for your battery

1 product

Battery charger ABSAAR Pro4.0 6/12V 4A Smart Charger
- 6 V
€50.60

Frequently asked questions

: Yes, you can install a higher capacity (Ah) battery as long as the physical dimensions fit your Tesla Model 3 EV battery compartment and the positive terminal position matches.
: The Tesla Model 3 Ev requires a battery with the correct capacity (Ah) and Cold Cranking Amps (CCA) for this engine. Compatible batteries offer 38 Ah, 460 A (CCA), 12 V, case 51R (BCI). Browse the compatible battery list below.
: The exact Ah rating for the Tesla Model 3 Ev depends on the vehicle's original electrical consumers. Compatible batteries offer 38 Ah, 460 A (CCA), 12 V, case 51R (BCI). Use our finder for a precise recommendation.
: You need the make, model and engine. If your car has Start-Stop (the engine switches off at traffic lights), it needs an EFB or an AGM battery, depending on what it came with: if it has an AGM, fit another AGM; if it has an EFB, another EFB or an AGM. On cars with battery management (BMW, Mercedes, VAG group…), moving from EFB to AGM requires coding the new battery. Without Start-Stop, a conventional battery is fine, or an EFB or AGM if you want a longer life.
: A conventional (lead-acid) battery is for cars without Start-Stop. An EFB is a reinforced conventional battery for basic Start-Stop. An AGM offers the highest performance and is fitted as standard on cars with advanced Start-Stop, regenerative braking or high electrical demand. Replacement rule: an AGM only with another AGM; an EFB with another EFB or an AGM; a conventional battery with any of the three. Never move down in technology.
: Use the search tool by selecting your vehicle's make and model. Our system automatically filters compatible part numbers verified by our technicians. If you have any questions, contact us via WhatsApp.
: All our batteries come with the legal guarantee provided by consumer law against manufacturing defects. If a battery has a manufacturing defect, it will be replaced at no cost to the user.
: Under normal circumstances, batteries usually arrive within 1 to 2 days of ordering. However, there are some cases where delivery may take a little longer: peak seasons (Black Friday, Christmas, etc.), palletized shipments, occasional stock shortages, etc.
: In mainland Spain and Portugal delivery takes 24 working hours if you order before 6:00 pm and the battery is in stock; for the Balearic Islands and other EU destinations allow 2 to 5 days. Batteries are shipped fully charged and ready to install.

Guides

Batteries for Tesla Model 3 EV 283 hp (electric, from 2020)

Which battery does a Tesla Model 3 EV need?