# Varta J3 · Truck battery 12V 125Ah 950A

![Varta J3 · Truck battery 12V 125Ah 950A](https://bateriasonline.es/1692-home_default/varta-j3.jpg)

> Varta J3 (ETN 625023000): 125 Ah truck battery, 950 A (EN), 286×269×230 mm. VAT included and shipping cost shown before you pay.

**Category:** [Truck, commercial and agricultural vehicle batteries](https://bateriasonline.es/en/truck-agricultural-batteries) → [Varta](https://bateriasonline.es/en/varta-batteries)

- **Canonical URL**: https://bateriasonline.es/en/varta-j3
- **Language**: en
- **Brand**: Varta
- **Reference**: BOL-VARTA-J3
- **EAN**: 4016987166543
- **MPN**: J3
- **Price**: 320,45 € (VAT incl., Spain)
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Varta |
| Range | VARTA ProMotive SLI |
| Application | Trucks and commercial vehicles |
| Technology | Lead-acid |
| Voltage | 12 V |
| Capacity | 125 Ah |
| Cold cranking amps (EN) | 950 A |
| Length | 286 mm |
| Width | 269 mm |
| Height | 230 mm |
| Weight | 36.8 kg |
| Terminal layout | 2 |
| ETN code | 625023000 |

## Quick description

Varta J3 (ETN 625 023 000, also written J 3 or 625023000): truck battery with 12 V, 125 Ah and 950 A cold cranking current, measuring 286 × 269 × 230 mm.

## Description

## The Varta J3 at a glance

The Varta J3 turns heavy diesel engines and powers cabs with high consumption. The J3 is fitted alone or in pairs, in series, for the 24 V system of many trucks.
In the Varta catalogue, the J3 belongs to the Promotive SLI line. [More Varta batteries](https://bateriasonline.es/en/varta-batteries)

## Lead-acid technology in the J3

Inside, the J3 is classic lead-acid: liquid electrolyte and lead plates. If the J3 is left discharged for weeks it sulphates: a maintenance charger prevents this.

## Varta J3 vs J8 and H9: differences

What sets the J3 apart from its neighbours in the Varta range:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Varta J3 (this one) | 125 Ah | 950 A | 286 × 269 × 230 | 36.8 kg |
| Varta J8 | 135 Ah | 680 A | 360 × 253 × 240 | 35.46 kg |
| Varta H9 | 100 Ah | 720 A | 313 × 175 × 205 | 22.32 kg |

- Varta J8: 10 Ah more, 270 A less cranking power, a different case (360 × 253 × 240 mm).
- Varta H9: 25 Ah less, 230 A less cranking power, a different case (313 × 175 × 205 mm).

## Equivalents and alternatives to the Varta J3

No other reference in the catalogue fully matches the dimensions and polarity of the J3; you will find the closest ones among our [truck, commercial and agricultural vehicle batteries](https://bateriasonline.es/en/truck-agricultural-batteries).

## Varta J3 codes and part numbers

This is how the Varta J3 appears on the label and in parts catalogues:

| Commercial reference | J3 (J 3) |
|---|---|
| ETN code | 625023000 (also 625 023 000) |
| EAN | 4016987166543 |
| Case size according to Varta | NATO |
| UK code | 6TN |
| Base hold-down | B00 |
| Also known as | Varta J 3 · Varta 625023000 · Varta 625 023 000 |

## What to look at before buying the J3

- Cold cranking: 950 A (EN), equal to or higher than the original.
- With 125 Ah, the J3 replaces an original battery of that capacity or slightly less.
- Length, width and height of the J3: 286 × 269 × 230 mm.

## Frequently asked questions about the Varta J3

### Varta J3 or J8?

Compared with the J3, the Varta J8 has 10 Ah more and 270 A less cranking power. The J3 cranks harder; the J8 is only a good option if your original battery says 680 A or less. Mind the space: the J8 measures 360 × 253 × 240 mm.

### What is the ETN code of the Varta J3?

625023000, also written 625 023 000. The ETN (European Type Number) is printed on the label and used in parts catalogues.

### How much does the Varta J3 weigh?

The J3 weighs 36.8 kg. For reference, the Varta J8 (135 Ah) weighs 35.46 kg.

### Which charger does the Varta J3 need?

An automatic lead-acid charger with cut-off or maintenance mode, rated at 10 to 20% of its capacity in amps. If it is a vented type, check the electrolyte level and top up only with distilled water.

## Other options if you are unsure about the J3

- [More truck, commercial and agricultural vehicle batteries](https://bateriasonline.es/en/truck-agricultural-batteries)
- [More Varta models](https://bateriasonline.es/en/varta-batteries)

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