12V Auxiliary Battery Specifications
This is the small 12V battery that powers the car’s electronics — not the high-voltage traction battery. Always confirm the exact part for your build with a dealer.
Frequently Asked Questions
What 12V battery does a Renault Megane E-Tech Electric need?
A 207 x 175 x 190 mm battery — the UK 012 / 079 case. On the EV40 the catalogue lists only EFB and AGM: Exide EL550 at 55 Ah and 540 amps EN, or Varta Dynamic AGM A9 at 50 Ah and 540 amps. On the EV60 it lists a wider range from 44 to 54 Ah including plain flooded options, plus the same AGM.
Is the Megane E-Tech battery a 012 or a 079?
Both codes describe the same case: 207 x 175 x 190 mm. They are not in conflict. What does differ between products is the technology and the capacity, and those are the figures worth checking.
Should I fit an EFB or a plain lead-acid battery?
Renault says the battery is a specific type and must be replaced with the same type, without publishing what that type is. Given that, and given the catalogue offers EFB and AGM against this car, the safe course is to read the label on the battery currently fitted and match it. Defaulting to the cheapest flooded option is the risk.
Does the Megane E-Tech Electric have a starter battery?
Not in the conventional sense. It is a battery-electric car with no engine to start. The 12V battery is an auxiliary battery that runs the electronics, the same job it does on any EV, and it is charged from the traction pack.
How long does the 12V battery last on an electric Megane?
No manufacturer figure is published and we will not invent one. A 12V auxiliary battery on an EV typically lasts several years. Failure usually shows up as electrical faults and a car that will not wake up, rather than as slow cranking.
How we check fitment for this guide
We cross-reference fitment figures against manufacturer specifications and OE-supplier catalogue data where available, and matched to the standard codes that actually govern fit — battery type/group sizes, wiper lengths and fitting types, bulb fitment codes, tyre size markings, and oil specifications. We work by make, model, year, engine, and build date, because a single model can take different parts across its life. Where the right part depends on your exact vehicle, we tell you to confirm by registration or VIN. More on our method →
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