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BMW i3 s Range Extender

Batteries for BMW i3 s Range Extender 102 hp

BMW · i3

Which battery does a BMW i3 s Range Extender need?

Specifications and battery: s Range Extender (102 hp)

BMW i3 s Range Extender (102 hp) uses a 21 Ah, 350 A AGM battery (205 × 90 × 165 mm), with the positive terminal on the right. As a Start-Stop battery, always replace it with another AGM.

Battery for this engine

VersionTechnologyCapacityCold cranking (EN)Size (L×W×H)Polarity
MainAGM21 Ah350 A205 × 90 × 165 mm+ on the right

This engine shares its battery with the Electric (170 hp), Electric (102 hp), s Electric (184 hp), s Electric (102 hp) and 1 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 BMW i3 s Range Extender

Quick answer You need an AGM battery of 21 Ah. Our recommendation: EXIDE ETX24HL-BS.

Batteries in your BMW i3 s Range Extender

Which battery do you want to replace?
MainOne optionSee all in the list →
Our recommendation
EXIDE ETX24HL-BS
EXIDE ETX24HL-BS
AGM21 Ah350 A
205 × 90 × 165 mm
€82.80Buy
AuxiliaryOne optionSee all in the list →
Our recommendation
EXIDE ETX24HL-BS
EXIDE ETX24HL-BS
AGM21 Ah350 A
205 × 90 × 165 mm
€82.80Buy

Prices and availability updated on 26/10/2026

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

📋 What we found

For your BMW i3 s Range Extender we found 2 compatible 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.

⭐ Our recommendation

Our recommendation

For your BMW i3 s Range Extender we recommend the EXIDE ETX24HL-BS (AGM, 21 Ah). It's one of the most installed references on this type of vehicle.

  • Get it on Wednesday before 5 PM — your product ships tomorrow.
  • The best value price among compatible options.
See this battery →
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Verified selection

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

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 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.
Category Make Reference Capacity Cold cranking Dimensions Technology Price
Auxiliary Battery EXIDE ETX24HL-BS 21 Ah 350 A 205×90×165 mm AGM €82.80 More info
Auxiliary Battery EXIDE AGM12-23 21 Ah 350 A 205×90×165 mm AGM €91.30 More info

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Chargers

Chargers for your battery

1 product Chargers keep your battery in optimal condition, especially if you do not drive daily.

Trustpilot reviews about the battery service in baterias.com

Frequently asked questions

BMW i3 s Range Extender (102 hp) uses a 21 Ah, 350 A AGM battery (205 × 90 × 165 mm), with the positive terminal on the right. As a Start-Stop battery, always replace it with another AGM. Compatible batteries offer 21 Ah, 340 A (CCA), 12 V, case TX24HL-BS, conventional flooded technology. Browse the compatible battery list below.
If your Bmw I3 S Range Extender has start-stop, regenerative braking or many electrical accessories, you will need an AGM or EFB battery. Check your vehicle's technical specifications.
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 delivery takes 24-48 working hours if you order before 6:00 pm (Monday to Friday) and the battery is in stock; mainland Portugal takes 1 to 4 working days, the Balearic Islands 2 to 5 working days and other EU destinations 4 to 7 working days. Batteries are shipped fully charged and ready to install.

Guides

This vehicle has no Start-Stop. According to the manufacturer, it does not need to be registered after the change.

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