# Varta A11 · Start-Stop battery 12V 45Ah 370A

![Varta A11 · Start-Stop battery 12V 45Ah 370A](https://bateriasonline.es/1544-home_default/varta-a11.jpg)

> Varta A11 (ETN 545902037): 45 Ah Start-Stop battery, 370 A (EN), 236×126×224 mm, positive terminal on the left, B24 case, AGM.

**Category:** [Start-Stop batteries (AGM and EFB)](https://bateriasonline.es/en/start-stop-batteries-agm-efb) → [Varta](https://bateriasonline.es/en/varta-batteries)

- **Canonical URL**: https://bateriasonline.es/en/varta-a11
- **Language**: en
- **Brand**: Varta
- **Reference**: BOL-VARTA-A11
- **EAN**: 4016987169940
- **MPN**: A11
- **Price**: 135,55 € (VAT incl., Spain)
- **Last updated**: 2026-11-07

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Varta |
| Range | VARTA Dynamic AGM |
| Application | Start-Stop cars |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 45 Ah |
| Cold cranking amps (EN) | 370 A |
| Length | 236 mm |
| Width | 126 mm |
| Height | 224 mm |
| Weight | 13.18 kg |
| Polarity | Positive terminal on the left |
| Case size | B24 (238 × 129 × 227 mm) |
| ETN code | 545902037 |

## Quick description

Varta A11 (ETN 545 902 037, also written A 11 or 545902037): Start-Stop battery (AGM) with 12 V, 45 Ah and 370 A cold cranking current, case size B24 (236 × 126 × 224 mm), with the positive terminal on the left.

## Description

## The Varta A11 at a glance

The Varta A11 is designed for automatic engine stop and regenerative braking. It takes repeated discharges without losing capacity the way a conventional battery would.
At 45 Ah it is a small size: the usual choice for petrol superminis and city cars with little equipment. In the Varta catalogue, the A11 belongs to the Dynamic AGM JIS line. [The full range of Varta batteries](https://bateriasonline.es/en/varta-batteries)

## Varta A11 vs A12: differences

What sets the A11 apart from its neighbours in the Varta range:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Varta A11 (this one) | 45 Ah | 370 A | 236 × 126 × 224 | left | 13.18 kg |
| Varta A12 | 35 Ah | 340 A | 196 × 126 × 223 | left | 11 kg |

- Varta A12: 10 Ah less, 30 A less cranking power, a different case (196 × 126 × 223 mm).

## Varta A11 codes and part numbers

This is how the Varta A11 appears on the label and in parts catalogues:

| Commercial reference | A11 (A 11) |
|---|---|
| ETN code | 545902037 (also 545 902 037) |
| EAN | 4016987169940 |
| Case size (EN) | B24 |
| Case size according to Varta | B24R |
| Base hold-down | B00 |
| Also known as | Varta A 11 · Varta 545902037 · Varta 545 902 037 · B24R |
| Not to be confused with | Varta E11 (74 Ah, 680 A, positive terminal on the right), Varta A17 (41 Ah, 360 A, positive terminal on the right), Varta C11 (53 Ah, 500 A, positive terminal on the right) |

## Equivalents and alternatives to the Varta A11

No other reference in the catalogue fully matches the dimensions and polarity of the A11; you will find the closest ones among our [start-Stop batteries (AGM and EFB)](https://bateriasonline.es/en/start-stop-batteries-agm-efb).

## Before ordering the A11, check this

- Measure the space: the A11 takes up 236 × 126 × 224 mm (European case size B24).
- Polarity of the A11: positive terminal on the left (if yours has it on the other side, the cables will not reach).
- Capacity of the A11: 45 Ah; the same as your current battery or slightly more is fine.
- Check the EN amps on your battery: if it says 370 A or less, the A11 covers your engine.
- The A11 is AGM: it replaces an AGM or an EFB of the same size. You can swap an EFB for an AGM, but not an AGM for an EFB.

## AGM technology in the A11

Inside, the A11 has glass fibre separators (AGM) that hold the electrolyte. The A11 needs a charger with an AGM mode that does not exceed 14.7 V.

## Frequently asked questions about the Varta A11

### Varta A11 or A12?

Compared with the A11, the Varta A12 has 10 Ah less and 30 A less cranking power. The A11 cranks harder; the A12 is only a good option if your original battery says 340 A or less. Mind the space: the A12 measures 196 × 126 × 223 mm.

### What does the code 545 902 037 on the Varta A11 mean?

It is its ETN (European Type Number), also written 545902037. The first three digits (545) encode voltage and capacity: 12 V and 45 Ah (5xx = under 100 Ah, 6xx = 100 to 199 Ah, 7xx = 200 Ah or more). The middle group (902) identifies the specific model within that capacity, and the last three digits (037) multiplied by 10 give the cold cranking current: 370 A.

### Can the Varta A11 be used in a car with Start-Stop?

Yes. As an AGM battery, the A11 handles automatic engine stop and brake energy recovery, and it can replace an EFB of the same size.

### How much does the Varta A11 weigh?

The A11 weighs 13.18 kg. For reference, the Varta A12 (35 Ah) weighs 11 kg.

### What case size is the Varta A11?

Case size B24: 236 × 126 × 224 mm (Varta lists it as B24R). The A11 fits any standard B24 battery tray.

### Which side is the positive terminal on the Varta A11?

The A11 has the positive terminal on the left, looking at the battery from its long side with the terminals closest to you.

## Keep comparing: alternatives to the A11

- [Other start-Stop batteries (AGM and EFB)](https://bateriasonline.es/en/start-stop-batteries-agm-efb)
- [The whole Varta range](https://bateriasonline.es/en/varta-batteries)
- [Exide EK508](https://bateriasonline.es/en/exide-ek508) · 50 Ah, 800 A, 260×173×206 mm

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*bateriasonline.es — Batteries and accessories · 2026-11-10*