# Varta A7 (formerly E39): what changed and equivalents

> The Varta A7 replaces the E39: the same 70 Ah, 760 A AGM in an L3 case for Start-Stop cars. AGM equivalents and how it differs from the N70 EFB.

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- **Language**: en
- **Last update**: 2026-11-11

Updated: 27 October 2026 · Technical data from the manufacturers' datasheets ([how we write our datasheets](https://bateriasonline.es/en/how-we-write-our-battery-datasheets))
The Varta A7 is the direct replacement for the Varta E39: it is the new name for the same 70 Ah, 760 A AGM battery, with the same dimensions (278 × 175 × 190 mm), L3 case and positive terminal on the right. If your car had an E39, the A7 is the correct replacement; its ETN code is 570 901 076.
It is designed for Start-Stop cars that leave the factory with an AGM battery, often those that also recover energy under braking.

## E39 and A7: the specs side by side

| Spec | Varta E39 | Varta A7 |
|---|---|---|
| Range | VARTA SILVER dynamic AGM | VARTA Dynamic AGM |
| Technology | AGM | AGM |
| Voltage | 12 V | 12 V |
| Capacity | 70 Ah | 70 Ah |
| Cold cranking (EN) | 760 A | 760 A |
| Dimensions (L × W × H) | 278 × 175 × 190 mm | 278 × 175 × 190 mm |
| Case | L3 | L3 |
| Weight | 20.4 kg | 20.3 kg |
| Polarity | Positive terminal on the right | Positive terminal on the right |
| ETN code | — | 570 901 076 |

Capacity, cold cranking, dimensions, case and polarity are identical. The E39 was sold in the Silver Dynamic AGM range, while the A7 belongs to the VARTA Dynamic AGM range. The small weight difference in the table is the one shown on each datasheet.

## What an AGM battery is and which cars need one

In an AGM (Absorbent Glass Mat) battery the electrolyte is held in glass-fibre separators rather than being free liquid as in a conventional battery. That lets it withstand far more charge and discharge cycles, which is exactly what a Start-Stop car demands: the engine stops at every set of lights and the battery alone keeps the electronics running until the next start.
- If your car has an **AGM fitted as standard**, always replace it with another AGM: the A7 or an AGM equivalent from the table.
- If it has an **EFB fitted as standard**, you can fit another EFB or upgrade to AGM.
- If it has no Start-Stop, an AGM works too, although a conventional battery such as the [Varta E11](https://bateriasonline.es/en/varta-e11) is usually enough.

## AGM equivalents of the Varta A7

These AGM batteries in our range match the A7's specs: same voltage and polarity, dimensions within 4 mm, capacity within 6 % and comparable cold cranking. In the Exide, Tudor, Fulmen and Deta codes, the letter K means AGM.

| Battery | Brand | Technology | Capacity | Cold cranking (EN) | Dimensions (L × W × H) | Polarity |
|---|---|---|---|---|---|---|
| Exide EK720 | Exide | AGM | 72 Ah | 760 A | 278 × 175 × 190 mm | Positive terminal on the right |
| Tudor TK720 | Tudor | AGM | 72 Ah | 760 A | 278 × 175 × 190 mm | Positive terminal on the right |
| Fulmen FK700 | Fulmen | AGM | 70 Ah | 760 A | 278 × 175 × 190 mm | Positive terminal on the right |
| Fulmen FK720 | Fulmen | AGM | 72 Ah | 760 A | 278 × 175 × 190 mm | Positive terminal on the right |
| Deta DK700 | Deta | AGM | 70 Ah | 760 A | 278 × 175 × 190 mm | Positive terminal on the right |
| Deta DK720 | Deta | AGM | 72 Ah | 760 A | 278 × 175 × 190 mm | Positive terminal on the right |

Equivalents from other brands, including the Bosch reference with the same ETN, are in [Varta, Bosch, Exide and Tudor car battery equivalents table](https://bateriasonline.es/en/varta-bosch-exide-tudor-car-battery-equivalents).

## A7 (AGM) vs N70 (EFB)

The [Varta N70](https://bateriasonline.es/en/varta-n70) has the same 70 Ah, 760 A and L3 case as the A7, but it is an EFB (Enhanced Flooded Battery): a wet-electrolyte battery reinforced for Start-Stop, without AGM technology.

| Spec | Varta A7 | Varta N70 |
|---|---|---|
| Range | VARTA Dynamic AGM | VARTA Dynamic EFB |
| Technology | AGM | EFB |
| Voltage | 12 V | 12 V |
| Capacity | 70 Ah | 70 Ah |
| Cold cranking (EN) | 760 A | 760 A |
| Dimensions (L × W × H) | 278 × 175 × 190 mm | 278 × 175 × 190 mm |
| Case | L3 | L3 |
| Weight | 20.3 kg | 18.83 kg |
| Polarity | Positive terminal on the right | Positive terminal on the right |
| ETN code | 570 901 076 | 570 500 076 |

- **An A7 can replace an N70:** it is a technology upgrade in the same size.
- **An N70 should not replace an A7** in a car that came with AGM: the Start-Stop system is calibrated for the AGM.

## Other Varta AGM and EFB batteries by size

If your car takes another size, the same logic applies to the [Varta A8](https://bateriasonline.es/en/varta-a8) (60 Ah, L2 case) and the [Varta A6](https://bateriasonline.es/en/varta-a6) (80 Ah, L4 case) in AGM, and to the [Varta N80](https://bateriasonline.es/en/varta-n80) (80 Ah, L4 case) in EFB. You will find them all in [AGM Start-Stop batteries](https://bateriasonline.es/en/agm-start-stop-batteries) and [EFB Start-Stop batteries](https://bateriasonline.es/en/efb-start-stop-batteries).

## Frequently asked questions

### Is the Varta E39 the same as the A7?

Yes: the A7 replaces the E39 with the same capacity (70 Ah), cold cranking (760 A), dimensions, L3 case and polarity. Only the name and the range have changed.

### Can I fit an N70 instead of an A7?

Not if your car came from the factory with an AGM battery. An EFB does not cope as well with the cycles of a Start-Stop system designed for AGM. The other way round is fine: an A7 instead of an N70.

### Which batteries from other brands are equivalent to the Varta A7?

In our range, the Exide EK720, the Tudor TK720, the Fulmen FK700 and FK720 and the Deta DK700 and DK720, all AGM, in L3 case dimensions with the positive on the right.

### Do I need to register the new battery with the car?

On many Start-Stop cars, yes: the battery management system needs to know the battery is new in order to charge it correctly. Follow the vehicle manufacturer's procedure or have a garage do it.

### Can I charge an AGM battery with any charger?

It is better to use a charger with an AGM mode, as it controls the charging voltage this technology needs. You will find models in [Battery chargers](https://bateriasonline.es/en/battery-chargers).

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*bateriasonline.es — Batteries and accessories · 2026-11-11*